Устройство передачи аналогового электрического сигнала по ВОЛС

Устройство передачи аналогового электрического сигнала по ВОЛС содержит N≥1 каналов. Каждый канал состоит из лазерного модуля, входного волокна, выходного волокна, электрооптического модулятора интенсивности по схеме интерферометра Маха-Цандера, источника питания для модулятора, приемника оптического излучения и оцифровщика. В каждом из N каналов устройства передачи содержит модулятор, высокочастотный сумматор электрических сигналов и источник высокочастотных электрических сигналов. Сумматор соединен с указанным источником и генератором электрических импульсов. Технический результат заключается в обеспечении возможности точного восстановления формы электрического сигнала по зарегистрированному оптическому аналогу, передающемуся по ВОЛС с внешней модуляцией, без проведения процедур настройки и периодического контроля рабочей точки модулятора, а следовательно, без контроллеров рабочей точки и без необходимости подачи постоянного оптического излучения на вход модулятора. 3 ил.

ФОТОЭЛЕКТРИЧЕСКИЙ ОПТОВОЛОКОННЫЙ МОДУЛЬ

Изобретение относится к области радиофотоники и может быть использовано при конструировании устройств возбуждения антенн и активных фазированных антенных решеток для связи, радиолокации и радионавигации. Сущность: фотоэлектрический оптоволоконный модуль включает оптоволокно и полупроводниковый гетероструктурный фотодиод, включающий узкозонный фотоактивный слой, заключенный между двумя широкозонными слоями. На тыльной поверхности гетероструктуры выполнены слой диэлектрика с показателем преломления <1,4 и слой металла с коэффициентом отражения более 96%. Фотодиод выполнен в виде основного цилиндра с двумя выступами, выполненными в виде частей дополнительных цилиндров. Площадь поперечного сечения основного цилиндра установлена превышающей в 20-50 раз суммарную площадь поперечных сечений выступов. При этом фронтальная поверхность одного из выступов установлена в одной плоскости с фронтальной поверхностью гетероструктуры, а фронтальная поверхность другого выступа выполнена примыкающей к торцу ...

Optical microcable network with radio connections to subscribers

The cable (2) is laid under the pavement between the lamp-posts (4), each of which has an optical connector and transmitter/receiver (7) installed in its pedestal. The signal is relayed by a radio link from an antenna (5) mounted on the lamp-post to a subscriber (TL) in a neighbouring building. The distance to each subscriber is short and a good radio link is guaranteed so that any data format, transmission method, data protection and type of modulation can be used.

Zwischenumwandlungs-Vermittlungsvorrichtung zum Senden und Empfangen von Infrarotstrahlen und Mikrowellen

Distributed network and base stations where each transmission path of a plurality of paths carries a signal representative of an operator's spectrum segment

A network is provided with a plurality of links that couple a plurality of antennas with a plurality of base stations. At least one base station or antenna location is geographically remote from the network and is connected to the network with a free space link. At least one of the plurality of links provides multiple transmission paths between at least a portion of the base stations with at least a portion of the antennas. Each transmission path of the plurality of transmission paths carries a signal representative of a respective segment of wireless spectrum that is associated with a respective operator.

A low cost wireless optical transceiver module

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

IMPROVED VCSEL SIMILAR ONE OPTICAL CONNECTION

MODULE FOR THE UBERTRAGEN OF RADIO DATA UBER OPTICAL FIBER

LOW-NOISE SIGNAL GENERATOR FOR USE IN A RFID SYSTEM

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

OPTICAL �BERTRAGUNGSSYSTEM F�R of PORTABLE RADIO SIGNALS

Data communications system

Generation of optical signals with rf components

Method and apparatus for sharing infrastructure between wireless network operators

Active optical combiner for CATV network

An active optical combiner for a CATV network.

Generation of optical signals with RF components

SYSTEMS AND METHODS FOR CLIP PREVENTION IN A CATV NETWORK

Systems and methods for preventing laser clipping in a CATV network. An optical transmitter operates in burst mode, comprising a controller capable of reducing clipping of said transmitter by at least one of varying a modulation signal to said transmitter and varying a bias of said transmitter.

Hybrid picocell communication system

RFID SYSTEM FOR DETECTING LOW POWER RESONANT TAGS

In a radio frequency identification (RFID) system using intelligent tags, amplitude and phase noise is minimized by using a low noise crystal oscillator (70) having an output frequency which is an integer multiple of the desired RF field frequency, then dividing this frequency using cascaded flip-flops for the frequency divider (72). Both outputs of the final stage flip-flop drive the transmitter antenna (34) to produce a continuous wave signal. Fiber optics (44) communicate analog tag response signals from the output of the receiver circuit (24) to the input of a tag response signal anlyzing module (20) including a digital signal processor (DSP 38), thus providing electrical isolation between these circuit elements, breaking ground loops, stopping internal switching noise from the DSP (38) from entering the receiver circuitry (24), and preventing common mode signals from interfering with the desired RFID tag signal.

MULTIPLE WAVELENGTH LIGHT SOURCE, AND GENERATION METHOD FOR MULTIPLE WAVELENGTH LIGHT

... ²It is an object of the present invention to provide a multiple wavelength ²light ²source capable of generating lights of more wavelengths, and a generation ²method for ²multiple wavelength light using a multiple wavelength light source.²A multiple wavelength light source of the present invention is a multiple ²wavelength light source having an optical comb generator for obtaining an ²input light ²and a group of lights shifted from the input light by predetermined ²frequencies; and an ²optical adjusting portion adjusting lights to be inputted to the optical comb ²generator; ²wherein the optical comb generator is composed of an optical fiber loop (105) ²which is ²provided with an optical SSB modulator (101), an optical amplifier (102) for ²compensating a conversion loss at the optical SSB modulator, an optical input ²port ²(103) for inputting lights from the light source, and an optical output port ²(104) for ²outputting lights, and the optical adjusting portion obtains a plurality of ²lights ...

HYBRID PICOCELL COMMUNICATION SYSTEM

A free-space laser communication system. The system is comprised of a large number of picocells. Each picocell comprises a base station providing conventional communication with at least one user but typically several or many users. Each base station comprises at least two laser transceivers, each transceiver having a pointing mechanism for automatic alignment. These transceivers provide communication with other base stations, relay information between other base stations or transmit information to conventional communication systems. The picocells cover relatively small geographical ranges such as about 100 meters. Applicant has demonstrated that at these distances atmospheric effects attenuating laser beams are not a serious problem. In a preferred embodiment the base stations generally comprise four laser transceivers with micro processor controlled pointing equipment which are aligned automatically to point at other base stations and an RF transceiver to provide communication with users ...

MULTICHANNEL SOFTWARE DEFINED RADIO RECEIVER WITH OPTICALLY ISOLATED ADC

A high speed split receiver interface system for sensing a series of external signals, the system including: a series of remote radio head units for receiving a sensed signal in an analog electric form, each of the remote radio head units converting their sensed signal to a corresponding digital electrical form and then to a corresponding optical data form for dispatch over an optical data interconnection; at least one optical interconnect interconnecting each remote radio head unit with a baseband unit; a first baseband unit interconnecting the series of remote head units corresponding optical interconnects, and including a converter for conversion of the received optical signals to corresponding electrical digital form and down sampling the optical signals to corresponding down sampled signals, a memory store for storing the down sampled signals, and an external network interface for transmission of the saved signals to an external device.

MOBILE COMMUNICATION SYSTEM

GAIN EQUALIZATION FOR OPTICAL FIBER DISTRIBUTION NETWORK

Circuitry in central and remote transceivers is disclosed to monitor wireless telephone signal levels and control the settings of gain control circuitry in a plurality of remote transceivers that carry telephony signals between wireless telephones and the central transceiver via an optical distribution network. The central transceiver therefore receives the remote wireless telephony signals from all transceivers within a given range of signal amplitude.

Anordnung zur Signalübertragung zwischen Stationen mittels Lichtwegen

A USB power supply fiber transmit-receive apparatus

The invention discloses a USB power supply fiber transmit-receive apparatus comprising a photoelectric conversion unit, a USB power supply unit and a monitor unit. The monitor unit comprises a processing module and a communication interface module, a temperature detection module, a display module and a network interface module which are connected with the processing module. A signal receiving end of the processing module is connected to a protocol conversion module. The USB power supply unit comprise a USB power supply interface and a power supply conversion chip. A power supply outlet wire on the power supply conversion chip is connected to the various modules in the fiber transmit-receive apparatus. The beneficial effects of the present invention are that: the USB power supply interface is arranged, and operation can be carried out once after connection to a USB interface of devices such as a computer is carried out, so that the usage is convenient; through the arrangement of the monitor ...

ELECTRONIC DEVICE AND DATA CONTROL METHOD

The invention provides an electronic device and a data control method. The disclosure provides an electronic device including a coupler, a transceiver, and a control circuit. The coupler generates a coupled downlink signal according to a downlink signal from a head-end unit. The transceiver switches between the transmission of a downlink signal and the reception of an uplink signal according to a control signal. The control circuit receives the coupled downlink signal, generates a status counting signal according to the power status of the coupled downlink signal, and generates the control signal according to the status counting signal. Only when the level of the coupled downlink signal is lower than an amplitude threshold level with a duration longer than a status counting time, the control circuit converts the status counting signal from a first logic level to a second logic level opposite to the first logic level. Otherwise, the control circuit maintains the status counting signal on ...

PRIORITY BASED RECONFIGURATION SCHEME FOR REMOTE UNITS

Method for suppressing crosstalk of OAM multiplex communication system

Methods, systems and devices for integrating wireless technology into a fiber optic network

System for simultaneous high-efficiency data down-conversion and data modulation using EAM modulator

The invention belongs to the technical field of radio-on-fiber (ROF) communication systems, and discloses a system proposal for remotely transmitting local oscillation (LO) signals and simultaneously performing data down-conversion and uplink data modulation with nonlinear characteristics of an EAM. Sidebands of all stages which are sent by a central station are taken as the LO signal, a base station selectively filters by an optical band pass filter so that the base station only needs one EAM and one optical filter to realize data uplink transmission without laser source and local oscillation radio frequency source, thus greatly reducing devices of the base station, and reducing cost of the base station. In the precondition that the central station is not changed, the cost of the whole system can be reduced by changing the base station modulator into the EAM, thus the feasibility of the proposal is high, and the system can be easily realized.

System for generating multi-path wireless and wired signals based on single modulator

Railway GSM-R optical fiber repeater system with GPS Beidou signal coverage

Bidirectional analog optical fiber transmission system with mixed WiFi and 3G signals

Distributed optical-load -WiFi-ZigBee wireless network device

A downlink, the uplink data transmission method and device

Optical transceiver access system based on multiple systems

The invention discloses an optical transceiver access system based on multiple systems, which belongs to the technical field of optical transceiver access. The system comprises a near-end machine, a far-end machine, an optical fiber module and an optical fiber cable; a downlink transmitting end of the near-end machine is connected with an uplink receiving end of the optical fiber module, and a downlink transmitting end of the optical fiber module is connected with an uplink receiving end of the far-end machine through the optical fiber cable. According to the optical transmitter and receiver access system based on the multiple systems, the signals received by the multi-system combiner can be preprocessed through the signal preprocessing module, useless interference signals can be effectively removed, the anti-interference capacity is good, signal transmission is stable, and the network quality can be fully guaranteed; the power amplitude regulation and control module can regulate and control ...

Electrical signal generating device and method thereof

The invention provides an electric signal generating device and a method thereof. The device comprises a laser light source, an optical coupler, a first electro-optical modulation module, a second electro-optical modulation module, a signal generator, a single-mode optical fiber, an optical circulator, a photoelectric detector and an electric power divider. The laser light source is connected with the optical coupler; a first coupling output port and a second coupling output port of the optical coupler are respectively connected with the first electro-optical modulation module and the second electro-optical modulation module; an optical output port of the first electro-optical modulation module is connected with the single-mode optical fiber, an optical output port of the second electro-optical modulation module is connected to a first port of the optical circulator, and a radio frequency port of the second electro-optical modulation module is connected with the signal generator; a second ...

Optimization method of carrier suppression double-sideband modulation optical fiber wireless communication system

The invention relates to the technical field of photoelectric signal processing, in particular to an optimization method of a carrier suppression double-sideband modulation optical fiber wireless communication system, which comprises the following steps: light waves emitted by a laser LD pass through an MZM modulator to be modulated by radio frequency signals, the MZM modulator is biased at a minimum output point, the phase difference between radio frequency driving signals of an upper arm and a lower arm is pi, the method is realized by a phase shifter, the extinction ratio of an actual commercial MZM modulator is limited, and when modulation indexes of an upper arm and a lower arm are equal and a phase difference between driving signals is pi, the MZM modulator outputs + 1-order and-1-order sidebands and a small amount of unnecessary carrier components under a small signal modulation condition; according to the invention, a carrier suppression double-sideband CS-DSB modulation optical ...

Signal transmission line and control method and device based on signal transmission line

The invention relates to a signal transmission line and a control method and device based on the signal transmission line, and the signal transmission line comprises a source end control unit which is used for determining a target code rate according to an output code rate of a source end and a receiving code rate of a terminal, and determining a first transmission code rate and/or a second transmission code rate based on the target code rate; the first photoelectric converter is used for outputting a first wavelength signal according to the first transmission code rate; the second photoelectric converter is used for outputting a second wavelength signal according to a second transmission code rate; the optical fiber cable is used for transmitting the first wavelength signal and/or the second wavelength signal to a receiving end of the terminal; the first wavelength signal and the second wavelength signal of the first photoelectric converter and the second photoelectric converter are adjusted ...

DEVICE Of BIDIRECTIONAL AMPLIFICATION IN a TERMINAL RADIO DEPORTEE

OPTICAL TRANSMITTER MICROWAVE WITH LASER CAR PULSATING

RADIO COMMUNICATION SYSTEM OF A SUBMARINE, BUOY RADIO COMMUNICATION FOR SUBMARINE AND METHODS FOR WIRELESS COMMUNICATION OF SUBMARINE

Le système de radiocommunication de sous-marin comprend au moins un appareil de radiocommunication (6) à bord d'un sous-marin, au moins une antenne radioélectrique (8) portée par une bouée (10), et un système de transmission radio-sur-fibre (12) configuré pour la transmission, via une liaison à fibre optique (14) reliant la bouée (10) au sous-marin (2), de signaux radioélectriques entre l'antenne radioélectrique (8) et l'appareil de radiocommunication (6).

METHOD AND APPARATUS FOR ATTENUATING NONLINEAR COMPONENTS IN MULTI-BAND OFDM-BASED ROF COMMUNICATION SYSTEM

The present invention discloses a method and apparatus for attenuating nonlinear components in a multi-band OFDM-based RoF communication system. The disclosed method comprises the steps of: (a) determining a dominant polarity for each band of a multi-band OFDM signal; (b) comparing the dominant polarity for each band, which is determined in the step (a), with a predetermined reference polarity for each band; and (c) switching the dominant polarity of a corresponding band when the determined dominant polarity of a specific band is different from the reference polarity thereof. According to the present invention, the method and apparatus are capable of attenuating nonlinear components while not requiring additional hardware in the multi-band OFDM-based RoF communication system. COPYRIGHT KIPO 2015 (600) Dominant polarity determination unit (610) Reference polarity storage unit (620) Polarity switching unit ...

이종신호 다중화 광링크 전송 장치 및 방법

... 본 발명은 이동통신 시스템 구성에 사용되는 광선로를 이용하여 수동형 광네트워크(Passive Optical Network:PON)를 추가 구성하면서도 추가 적인 광 파장을 이용하지 않도록 하여 광장비 구성을 최소화한 이종신호 다중화 광링크 전송 장치 및 방법에 관한 것으로, 이동통신 시스템 구성을 위해 사용된 광선로를 별도 데이터 전송을 위한 이종신호 전송에도 이용할 수 있도록 하면서도 이종신호 간 간섭이나 추가 광파장 이용에 따른 광장비 추가에 대한 문제를 해결하도록 하여 광범위하게 설치되는 이동 통신 기지국 구성용 광선로를 활용하여 경제적인 방식으로 별도의 데이터 전송망 구성이 가능한 효과가 있다.

Radio access system

통신 방법 및 장치

... 본 발명의 실시예는 통신 방법, 통신 기기, 통신 장치 및 베이스밴드(BBU)를 제공한다. 상기 통신 기기는, 베이스밴드 유닛(baseband unit, BBU), 및 n개의 물리적 안테나 또는 물리적 안테나들을 가지는 원격 무선 유닛(remote radio unit, RRU)을 포함하고, 상기 BBU 및 상기 RRU는 광섬유를 이용하여 연결되어 있고, 상기 n은 1 또는 2이다. 상기 BBU는 4개 채널의 신호를 획득하고, 상기 4개 채널의 신호 중 적어도 2개 채널의 신호에 기초하여 베이스밴드 디지털 신호를 생성하고, 상기 광섬유를 통해 상기 베이스밴드 디지털 신호를 상기 RRU에 전송하도록 구성되어 있고, 상기 4개 채널의 신호는 상기 BBU의 4개의 논리 포트와 일대일 대응 관계에 있다. 상기 RRU는 상기 베이스밴드 디지털 신호를 무선-주파수 신호로 변환하고, 상기 n개의 물리적 안테나 또는 물리적 안테나들을 이용하여 상기 무선-주파수 신호를 전송하도록 구성되어 있다. 본 발명의 실시예는 셀 용량 및 신호 품질을 향상시킬 수 있다.

무선 통신 시스템, 그의 광 중계 방법

... 본 발명은 모국과 자국간의 ISI를 해소하기 위하여 제안된 것으로서, 광 선로의 길이에 관계없이 동일한 딜레이가 발생하도록 신호 자체의 딜레이를 제어하는 광 중계 장치 및 그의 딜레이 제어 방법에 관한 것으로서, 기지국에서 단말로 전송할 하향 신호를 광 중계 장치에 제공함과 동시에 기 설정된 타임 어드밴스 값을 적용하여 무선 신호로 송출하고, 이때 광 중계 장치가 상기 하향 신호를 광 신호로 변환하여 광 선로로 전송하고, 광 선로의 종단에서 무선 신호로 변환하여 송출하되, 도너부와 리모트부 사이를 연결하는 광 선로에서 발생하는 딜레이를 측정하고, 딜레이 측정값과 상기 타임 어드밴스 값을 이용하여 기지국에서 송출된 무선 신호와 시간 차가 발생하지 않도록 딜레이 제어값을 산출하고, 딜레이 제어값에 따라서 상기 하향 신호를 딜레이 시키도록 구현된다.

REMOTE DEVICE OF OPTICAL RELAY SYSTEM

The present invention provides a remote device of an optical relay system. The remote device includes: a first remote driving unit and a second remote operating unit which extract transmission signals in frequency bands that are different from each other and come from downstream RF signals provided by each optical conversion unit and emits the transmission signals; and a downward path control unit that receives the downstream RF signals from the optical conversion unit and transmits the downstream RF signals to the second remote operating unit by going through the first remote operating unit or by-passing the first remote driving unit. COPYRIGHT KIPO 2015 (31) Optical conversion unit (33_1d) Downward path control unit (33_1u) Upward path control unit (35_1) First remote driving unit (35_2) Second remote driving unit ...

APPARATUS AND METHOD FOR MID-SPAN EXTENSION FOR ACCEPTANCE OF G-PON SERVICE IN XG-PON LINK BASED ON FRAME CONVERSION

An apparatus for mid-span extension device based on frame conversion of the present invention may comprise: a 10-gigabit-capable optical network unit (XG-ONU optical module) capable of transmitting and receiving wavelength signals of a 10-gigabit-capable optical line terminal (XG-OLT); a frame converting unit performing a conversion between a 10-gigabit-capable passive optical network (XG-PON) frame and a gigabit-capable passive optical network (G-PON) frame; and an optical line terminal (OLT optical module) capable of transmitting/receiving wavelength signals to/from an optical network unit (ONU). COPYRIGHT KIPO 2016 (100b) Frame conversion-based mid-span extension apparatus ...

REDUNDANT BACKUP NEAR-END MACHINE, REMOTE-END MACHINE AND SYSTEM FOR DIGITAL OPTICAL FIBER REPEATER

WIRELESS ACCESS SYSTEM

Embodiments of the present disclosure provide a wireless access System which may comprise a baseband processing unit (BBU) pool, an optical network unit (ONU) and a remote radio head (RRH), wherein the BBU pool may be connected to one or more ONUs, each of the ONUs may be connected to one or more RRHs, and the connection between each of the ONUs and the one or more RRHs may be implemented using a twisted pair. Embodiments of the présent disclosure can provide access, convergence and transport with a very large capacity from indoor antenna units to a centralized BBU as well as an easy installation, and thus they are cost economical for a large scale deployment of indoor wireless access. Furthermore, advanced wireless technologies, such as large scale MIMO and CoMP, can be supported. Embodiments of the présent disclosure further provide a remote radio head (RRH), an optical network unit (ONU), an optical line terminal (OLT) and a baseband processing unit (BBU) pool.

METHOD AND APPARATUS FOR HYBRID MULTIPLEXING / DE-MULTIPLEXING IN PASSIVE OPTICAL NETWORK

The present disclosure discloses a method and an apparatus for hybrid multiplexing/de-multiplexing in a passive optical network, the method comprising steps of: dividing N first intermediate frequency sub-bands averagely into M clusters, wherein each of the clusters contains K first intermediate frequency sub-bands and N=M*K, and wherein each of the K first intermediate frequency sub-bands carries a baseband digital electrical signal; selecting, by a software defined first intermediate frequency multiplexer, the baseband digital electrical signals of K first intermediate frequency sub-bands from the N first intermediate frequency sub-bands for software defined frequency division multiplexing and forming a cluster; and frequency division multiplexing, by an analog hardware cluster multiplexer, analog electrical signals of the M clusters on a second intermediate frequency sub-band. The hybrid analog radio over fiber scheme according to the present disclosure achieves the balance between the ...

RELAY NETWORK ELEMENT DEVICE, FAR-END NETWORK ELEMENT DEVICE AND OPTICAL FIBER DISTRIBUTED SYSTEM

Provided are a relay network element device, a far-end network element device and an optical fiber distributed system. By improving functions of the relay network element device and the far-end network element device, multiple paths of antenna signals can be modulated, by means of analog modulation, onto an intermediate frequency carrier, and are then converted by means of a radio frequency photoelectric module (ROF), such that the multiple paths of antenna signals are transmitted and made remote by means of one optical fiber, which can greatly reduce the cost and the construction difficulty of an optical fiber distributed system of a multi-antenna high-bandwidth communication system, and promotes the application of a 5G NR optical fiber distributed system indoors.

DISPERSION COMPENSATION FOR WAVEGUIDE COMMUNICATION CHANNELS

Embodiments of the present disclosure may relate to a transmitter that includes a baseband dispersion compensator to perform baseband dispersion compensation on an input signal. Embodiments may also include a receiver that includes a radio frequency (RF) dispersion compensator to perform RF dispersion compensation. Embodiments may also include a dielectric waveguide coupled with the transmitter and the receiver, the dielectric waveguide to convey the RF signal from the transmitter to the receiver. Other embodiments may be described and/or claimed.

CONTROL OF AN OPTICAL TRANSMITTER IN A RADIO OVER FIBRE SYSTEM

A radio over fibre system (5) comprises a base station (10, 20) with a first base station node (10) and a second base station node (20) connected by an optical communication link (30). At least one of the base station nodes (10, 20) comprises an optical transmitter (17, 23). A method of determining an operating parameter for the optical transmitter (17, 23) comprises receiving signal quality parameters for a plurality of user equipments (UE) served by the base station (10, 20). The method determines an operating parameter of the optical transmitter using the determined signal quality parameters of the plurality of user equipments (UE). The operating parameter of the optical transmitter can be a modulation parameter.

DYNAMIC CONTROL AND MODIFICATION OF COAXIAL TAP DIRECTIONALITY

A bi-directional coupler assembly includes a first port for connecting to one of an input forward path RF signal line and an output forward path RF signal line. A second port connects to the other of the input forward path RF signal line and the output forward path RF signal line. A relay is connected between the ports and to at least one directional coupler. In a first state of the relay, an input forward path RF signal delivered from the input forward path RF signal line and through the first port is directed through the at least one directional coupler in a first direction. In a second state of the relay, an input forward path RF signal delivered from the input forward path RF signal line and through the second port is directed through the at least one directional coupler in said first direction.

Structured substrate for optical fiber alignment

A structured substrate for optical fiber alignment is produced at least in part by forming a substrate with a plurality of buried conductive features and a plurality of top level conductive features. At least one of the plurality of top level conductive features defines a bond pad. A groove is then patterned in the substrate utilizing a portion of the plurality of top level conductive features as an etch mask and one of the plurality of buried conductive features as an etch stop. At least a portion of an optical fiber is placed into the groove.

Distributed antenna system for supporting MIMO service

A distributed antenna system supporting MIMO service is disclosed. Some embodiments provide a distributed antenna system supporting MIMO communication, including first node, second node and one transmission line. The first node receives MIMO downlink signals of a plurality of MIMO services each including N (a natural number of 2 or more) MIMO downlink signals, and performs, for each MIMO service, frequency-conversion of N−1 MIMO downlink signals among the N MIMO downlink signals, to different frequency band from original frequency band, to generate N MIMO downlink signals without mutually overlapping frequency bands. The second node performs, for each MIMO service, frequency-conversion of the MIMO downlink signals having been frequency-converted by first node, in a complementary manner, to reconstruct the MIMO downlink signals of original frequency band. The single transmission line is used between the first node and second node for transmitting N downlink signals without mutually overlapping ...

Display apparatus and control method for display apparatus

A display apparatus is disclosed. The display apparatus includes: an optical communication interface configured to communicate with an electronic device through an optical cable; and a processor for, when an optical signal including at least one signal among an image signal and a sound signal is received from the electronic device through the optical communication interface, measuring a strength of the received optical signal, and controlling an operation of the display apparatus related to a state of the optical cable, on the basis of the measured strength of the optical signal.

SYSTEMS AND METHODS FOR COMMUNICATING SIGNALING OVER AN OPTICAL DISTRIBUTED ANTENNA SYSTEM

In one embodiment, a distributed antenna system comprises: a master unit configured to receive a base station downlink radio frequency signal and to transmit a base station uplink radio frequency signal; and at least one remote antenna unit that is communicatively coupled to the master unit using at least one cable, the remote antenna unit configured to radiate a remote downlink radio frequency signal and to receive a remote uplink radio frequency signal; wherein the master unit comprises: a controller; and a respective interface to couple the controller to a first operator control panel; wherein the at least one remote antenna unit comprises: a controller; and a respective interface to couple the controller to a second operator control panel; wherein the master unit controller and the remote unit controller synchronize at least some information between the first and second operator control panels over the at least one cable.

Direct optical to RF transceiver for a wireless system

A hybrid optical-RF device, called a “stamp cell” herein, may be a small, passive repeating device that is designed to be placed close to User Equipment (UE) such that the UE only needs to reach a few meters using high frequency RF signals. The stamp cell may directly convert the received RF signal to an optical signal which may be transmitted to an optical receiver mounted on a traditional cell tower. Similarly, in the downlink direction, the stamp cell may receive optical signals from the cell tower and convert the optical signals to high frequency RF signals, which may be received by the UE.

SECURED HYBRID CODED MODULATION FOR 5G - AND BEYOND - ACCESS NETWORKS

Aspects of the present disclosure describe systems, methods, and structures that advantageously provide hybrid free-space optical (FSO)-radio frequency (RF) communication links (HFRCLs) that enable building integrated software-defined network (SDN) infrastructure capable of integrating ultra-high-throughput satellite networks, composite wireless infrastructures, heterogeneous networks (HetNets), hybrid networks, satellite networks, and fiber-optics networks—among others.

Wireless drop in a fiber-to-the-home network

One embodiment is directed to a wireless drop terminal (WDT) for use in a fiber-to-the-home (FTTH) network. The wireless drop terminal comprises a fiber interface to optically couple the wireless drop terminal to an optical line terminal (OLT) of the FTTH network via at least one optical fiber and a wireless interface communicatively coupled to the fiber interface. The wireless interface is configured to wirelessly communicate with a wireless optical network terminal (W-ONT) over a fixed directional wireless drop. Other embodiments are disclosed.

NEXT GENERATION IN-BUILDING RELAY SYSTEM AND METHOD

Provided are a next generation in-building relay system and method. The system includes: a 5G signal providing unit configured to down-convert a millimeter wave radio frequency signal to an intermediate frequency signal; a 5G master hub unit configured to convert the intermediate frequency signal into a radio over fiber (RoF) signal and transmit the RoF signal; an optical coupling unit configured to couple a digital optical signal output from a master hub unit and the analog optical signal output from the 5G master hub unit and transmit the coupled signal to an optical cable; and an optical distribution unit configured to separate the digital optical signal and the analog optical signal from the coupled signal, transmit the digital optical signal to a remote optical relay unit, and transmit the analog optical signal to distributed remote units.

SERIALLY-DISTRIBUTED DEVICES IN A COMMUNICATION NETWORK

Serially-distributed devices in a communication network include a cable including communication wires, a plurality of devices connected in series with the communication wires along a length of the cable, and a headend interface connected at one end of the cable and operable to provide a communication interface with the devices.

Local power management for remote antenna units in distributed antenna systems

Power management for remote units in a distributed communication system. Power can be managed for a remote unit configured to power modules and devices that may require more power to operate than power available to the remote unit. For example, the remote unit may be configured to include power-consuming remote unit modules to provide distributed antenna system-related services. As another example, the remote unit may be configured to provide power through powered ports in the remote unit to external power-consuming devices. Depending on the configuration of the remote unit, the power-consuming remote unit modules and/or external power-consuming devices may demand more power than is available at the remote unit. In this instance, the power available at the remote unit can be distributed to the power-consuming modules and devices based on the priority of services desired to be provided by the remote unit.

Method and system for high bandwidth, multi-consumer data and video distribution equipment

A method for use in a headend communications device, the method including receiving an input data signal over a fiber optic port, switching the input data signals to a plurality of data signals, converting the data signals to output coaxial cable signals and transmitting the output coaxial cable signals.

Method and Apparatus for Determining Propagation Delay in a Communications Network

Techniques are disclosed for determining propagation delay of a first path and or of a second path which connect a first transceiver unit associated with a first clock to a second transceiver unit associated with a second clock in a communications network, based on a first time reference representing a time of transmission of a first signal from the first transceiver unit, a second time reference representing the time of receipt of the first signal at the second transceiver unit, a third time reference representing a time of transmission of a reply to the second signal from the second transceiver unit, and a fourth time reference representing the time of receipt of the reply to the second signal at the first transceiver unit.

PHASED-ARRAY RADIO FREQUENCY RECEIVER

A method of RF signal processing comprises receiving an incoming RF signal at each of a plurality of antenna elements that are arranged in a first pattern. The received RF signals from each of the plurality of antenna elements are modulated onto an optical carrier to generate a plurality of modulated signals that each have at least one sideband. The modulated signals are directed along a corresponding plurality of optical channels with outputs arranged in a second pattern corresponding to the first pattern. A composite optical signal is formed using light emanating from the outputs of the plurality of optical channels. Non-spatial information contained in at least one of the received RF signals is extracted from the composite signal.

Wireless Communications System and Wireless Radio Frequency Apparatus

A wireless communications system includes a baseband processing unit (BBU), an optical multiplexer, M (greater than or equal to 2) first optical transceivers, and a wireless radio frequency apparatus, where the M first optical transceivers are provided between the BBU and the optical multiplexer, and operating wavelengths of the M first optical transceivers are different from each other. The wireless radio frequency apparatus includes M remote radio units (RRUs), M second optical transceivers separately corresponding to the M first optical transceivers, and at least one optical splitter, where the M second optical transceivers are separately connected to the M RRUs, and an operating wavelength of a first optical transceiver matches an operating wavelength of a corresponding second optical transceiver. The M second optical transceivers are connected to a same optical fiber by the optical splitter, and the optical fiber is connected to the optical multiplexer and the optical splitter.

APPARATUS AND METHOD FOR JOINT PROFILE-BASED SLICING OF MOBILE ACCESS AND OPTICAL BACKHAUL

Software Defined Networking concepts apply to access, fronthaul, backhaul and core networks of 5G mobile networks and beyond. Such network components currently have individual/segmented control planes and associated controllers to provide configurability, provisioning, and network slicing. This is because of technology disparity between these network components: access is wireless/cellular, backhaul and fronthaul are optical/fiber, and core is electrical/wire-line. A system/method is detailed that enables a coordinated and unified end-to-end slicing, wherein the coordination is provided in the system/method that (a) attaches to the respective controllers of these network components in real-time, (b) collects the connectivity topology of each network segment as the network evolves, (c) passes the slice-profile information (translating according to capabilities of that network segment to configure an end-to-end slice with a specified bandwidth requirement and service quality level), and ( ...

Network node and a method therein enabling a first unit to connect or to be connected ad-hoc to a second unit

Embodiments herein relate to a method in a network node configured in an optical network for enabling a first unit to connect ad-hoc to a second unit in a system configured for remote radio units and main units. The network node receives a connection request from the first unit over the optical network. The network node establishes a connection, to the first unit, for retrieving control data. The network node stores control data regarding the first unit. The control data is retrieved from the first unit over the established connection and wherein the control data enables the first unit to connect/be connected ad-hoc to the second unit for transferring user data over a physical path through the optical network.

Method of processing a digital signal for transmission, a method of processing an optical data unit upon reception, and a network element for a telecommunications network

A method of processing a digital signal for transmission is provided comprising digital data frames, by compressing the digital data frames; and generating an optical data unit for transmission comprising multiple of the compressed digital data frames. The optical data unit is configured for transport by an Optical Transport Network, OTN.

CABLE COMMUNICATION SYSTEMS AND METHODS EMPLOYING QAM UPSTREAM CHANNELS BELOW 16.4 MHZ FOR INCREASED AGGREGATE DEPLOYED UPSTREAM CAPACITY TO SUPPORT VOICE AND/OR DATA SERVICES

Cable communication systems and methods to provide voice and/or data services to subscriber premises via a cable plant that conveys upstream information over an upstream path bandwidth, and a cable modem system including one or more demodulation tuners to receive and demodulate one or more upstream radio frequency (RF) signals. One or more RF signals include an encoded carrier wave having a carrier frequency of between 5 MHz and 16.4 MHz that is modulated using a Time Division Multiple Access (TDMA) protocol or an Advanced Time Division Multiple Access (ATDMA) protocol and quadrature amplitude modulation (QAM) with voice and/or data information constituting at least some of the upstream information. An aggregate deployed upstream capacity of the one or more RF signals to convey the upstream information in a portion of the upstream path bandwidth between 5 MHz and 16.4 MHz is at least approximately 12 Megabits per second (Mbits/s). 1. A cable communication system to provide voice and/or data services to a plurality of subscriber premises , the system comprising: a first fiber optic cable;', 'a first node optical/RF converter coupled to the first fiber optic cable; and', 'a cable plant, coupled to the first node optical/RF converter, to convey at least upstream information from the plurality of subscriber premises over an upstream path bandwidth assigned to the first neighborhood node and including a range of frequencies; and, 'at least a first neighborhood node having an infrastructure comprising a headend optical/radio frequency (RF) converter coupled to the first fiber optic cable of the first neighborhood node; and', 'a cable modem system coupled to the headend optical/RF converter and including a plurality of demodulation tuners to receive and demodulate a plurality of upstream radio frequency (RF) signals from the first neighborhood node, each upstream RF signal of the plurality of upstream RF signals including an encoded carrier wave having a carrier frequency ...

WSON RESTORATION

Dynamic restoration involves routing and bandwidth assignment of an unplanned restoration path in a wavelength switched optical network (20), having regeneration nodes (60), nodes each having a ROADM (62) having drop paths and add paths. An electrical switch (68) provides configurable regeneration capacity by coupling selected drop paths to selected add paths. Some of the configurable regeneration capacity is kept for unplanned restoration paths. A PCE determines (120) routing and bandwidth assignments for an unplanned restoration path for the traffic flow to avoid a fault, and sends (130) configuration messages to the nodes to set up the unplanned restoration path dynamically and to configure the electrical switch to provide regeneration on the path. Keeping some reconfigurable regeneration capacity enables much longer unplanned paths to be found to avoid faults, and enables wavelength conversion if needed. Thus the reliability of finding at least one path avoiding the fault can be increased ...

Digital data compression and decompression device

There is provided a digital data compression device including a domain converter configured to perform frequency domain conversion on input digital I/Q data and output coefficient data corresponding to the digital I/Q data; a data converter configured to receive the coefficient data output from the domain converter and convert the input coefficient data of Cartesian coordinates into coefficient data of polar coordinates; and a quantizer configured to quantize the coefficient data of the polar coordinates output from the data converter.

Phased-array radio frequency receiver

A method of RF signal processing comprises receiving an incoming RF signal at each of a plurality of antenna elements that are arranged in a first pattern. The received RF signals from each of the plurality of antenna elements are modulated onto an optical carrier to generate a plurality of modulated signals that each have at least one sideband. The modulated signals are directed along a corresponding plurality of optical channels with outputs arranged in a second pattern corresponding to the first pattern. A composite optical signal is formed using light emanating from the outputs of the plurality of optical channels. Non-spatial information contained in at least one of the received RF signals is extracted from the composite signal.

METHOD FOR DATA TRANSMISSION USING A LINC AMPLIFIER, A LINC AMPLIFIER, A TRANSMITTING DEVICE, A RECEIVING DEVICE, AND A COMMUNICATION NETWORK THEREFOR

The invention concerns a method for transmission of a data signal from a transmitting device (BS) to a receiving device (RAH1) using a LINC amplifier (LINC1, LINC2) for signal amplification, wherein the data signal is represented by two phase modulated signal components of constant amplitude in a first part of the LINC amplifier (LINC1, LINC2) located in the transmitting device (BS), at least one of the two phase modulated signal components of constant amplitude is transmitted over at least one optical connection (OF1, 0F2, 0F4) from the transmitting device (BS) to the receiving device (RAH1), and the at least one of the two phase modulated signal components of constant amplitude is converted from an optical signal into an electrical signal in at least one opto-electrical converter (OE1, 0E2) located in said receiving device (RAH1), a LINC amplifier, a transmitting device, a receiving device, and a communication network therefor.

Distributed sensor system

A distributed sensor network that utilizes the cabling infrastructure installed for a Distributed Antenna System (“DAS”) to collect environmental data about a building. In this sensor network, an array of sensors are placed in line with the DAS communication cabling so that additional cabling is not required. The sensors use “out of band” frequencies or low level signaling so as to not interfere with the DAS signals to communicate the sensor data to the DAS head-unit.

SIGNAL PROCESSOR, RoF TRANSCEIVER, FIBER OPTIC RADIO SYSTEM, AND SIGNAL PROCESSING METHOD

Provided is a signal processor provided in a transceiver for transmitting and receiving a radio signal, and including a branch unit, a detection unit, a determination unit, and a power source controller. The branch unit branches a transmission signal and acquires a branch signal. The detection unit detects the branch signal and acquires a voltage value of the branch signal. The determination unit compares the voltage value of the branch signal with a threshold voltage previously stored in a storage unit and determines whether the voltage value of the branch signal is equal to or greater than the threshold voltage. The power source controller controls turning on and off of a power source for a reception signal amplifier of the transceiver according to a determination result determined by the determination unit.

Self-optimization of mobile networks using a distributed antenna system

A telecommunications system includes a distributed antenna system (DAS) having a master unit communicatively coupled to remote antenna units (RAUs) located remotely from the master unit, the master unit communicatively coupled to base stations; and a controller communicatively coupled to the base stations and the DAS. The controller is configured to obtain current base station performance parameter(s) including base station load data or overhead communications data from the base stations; determine an updated configuration for the DAS based on the current base station performance parameter(s), the configuration of the DAS comprising an assignment of the RAUs to one or more coverage zones and an assignment of a zone profile to each of the one or more coverage zones; and adjust the assignment of RAUs to the one or more coverage zones and/or the zone profile of each coverage zone to correspond to the determined updated configuration for the DAS.

APPARATUS AND METHOD FOR TRANSMITTING AND/OR RECEIVING DATA OVER A FIBER-OPTICAL CHANNEL EMPLOYING PERTURBATION-BASED FIBER NONLINEARITY COMPENSATION IN A PERIODIC FREQUENCY DOMAIN

An apparatus for determining an interference in a transmission medium during a transmission of a data input signal according to an embodiment has a transform module configured to transform the data input signal from a time domain to a frequency domain comprising a plurality of frequency channels to obtain a frequency-domain data signal comprising a plurality of spectral coefficients, wherein each spectral coefficient is assigned to one of the frequency channels, an analysis module configured to determine the interference by determining one or more spectral interference coefficients, wherein each spectral interference coefficient is assigned to one frequency channel. The analysis module is configured to determine each spectral interference coefficient depending on the spectral coefficients, and depending on a transfer function, wherein the transfer function is configured to receive two or more argument values, wherein each of the argument values indicates one frequency channel, and wherein ...

REPEATER AND METHOD FOR OPERATING SUCH A REPEATER

ARCHITECTURE FOR A WIRELESS NETWORK

Systems, methods and devices for providing communication signals and electrical power to active equipment are disclosed. Hybrid cables are used to transmit the electrical power and communication signals. Voltage converters are used to limit the voltage of the electrical power transmitted through the hybrid cables and delivered to the active devices.

IMPROVED STIMULATED BRILLOUIN SCATTERING (SBS) SUPPRESSION IN AN OPTICAL COMMUNICATIONS SYSTEM

WIRELESS SIGNAL DISTRIBUTION SYSTEM AND METHOD

A method for transmission of data signals using an analogue radio frequency power amplifier, a transmitting device and a receiving device therefor

DISTRIBUTED ANTENNA SYSTEM WITH MANAGED CONNECTIVITY

СИСТЕМА СВЯЗИ

В системе связи с радиостанциями и удаленными от них устройствами, например в сотовой системе мобильной радиосвязи радиостанции, передают радиосигналы и принимают радиосигналы, каждый из которых содержит сигнал связи. Согласно изобретению, максимально возможное число функций обработки смещено с неподвижных станций на удаленное оборудование. Передаваемый радиостанцией 2 радиосигнал создается тем, что в удаленном передатчике 10 вырабатывается немодулированная несущая и модулированная сигналом связи несущая, причем эти несущие разнятся по своей частоте на величину несущей частоты радиосигнала f1. Обе эти оптические несущие передаются на радиостанцию 2, там смешиваются в оптическом приемнике с образованием радиосигнала, содержащего сигнал связи. Радиосигнал, принимаемый на радиостанции 40, передается оптическим путем на удаленное устройство 44 и только там подвергается дальнейшей обработке. Эта передача происходит благодаря тому, что оптический передатчик 41, содержащийся в удаленном передатчике ...

СЕТЕВОЙ УЗЕЛ И СПОСОБ В УЗЛЕ, ОБЕСПЕЧИВАЮЩИЙ ВОЗМОЖНОСТЬ ПЕРВОМУ БЛОКУ ПОДКЛЮЧАТЬСЯ ИЛИ БЫТЬ ПОДКЛЮЧЕННЫМ КО ВТОРОМУ БЛОКУ В РЕЖИМЕ САМООРГАНИЗУЮЩЕЙСЯ СЕТИ

Изобретение относится к сетевому узлу, в частности к обеспечению возможности первому блоку подключаться ко второму блоку в режиме самоорганизующейся сети (ad-hoc) в системе, сконфигурированной для удаленных и основных блоков. Техническим результатом является обеспечение гибкого подключения основных блоков и удаленных блоков, без требования установления заранее сконфигурированной топологии сети. Предложен сетевой узел (16) в оптической сети (15), который принимает запрос на подключение от первого блока (17) по оптической сети (15). Сетевой узел (16) устанавливает подключение к первому блоку (17) для управляющих данных и сохраняет управляющие данные, относящиеся к первому блоку (17). Управляющие данные извлекаются из первого блока (17) по установленному подключению, и при этом управляющие данные обеспечивают возможность первому блоку (17) подключаться/быть подключенным ко второму блоку (18) в режиме ad-hoc для передачи пользовательских данных по физическому пути через оптическую сеть (15) ...

Устройство передачи аналогового электрического сигнала по ВОЛС

Techniques for Single Sideband Suppressed Carrier (SSBSC) Optical Signals that Scale to Bandwidths over 20 Gigahertz

A method and apparatus includes an optical source for a single order single-sideband suppressed-carrier optical signal with a bandwidth that scales from over 1 gigaHertz to greater than 20 gigaHertz. In an example embodiment, an apparatus includes a stable laser source configured to output an optical carrier signal at a carrier frequency. The apparatus includes a radio frequency electrical source configured to output an electrical radio frequency signal with a radio frequency bandwidth less than one octave. The apparatus also includes an optical modulator configured to output an optical signal with the optical carrier signal modulated by the radio frequency signal in a plurality of orders of optical frequency sidebands. The apparatus further includes an optical filter configured to pass one single order optical frequency sideband of the optical signal.

Deployable photonic link and interface module

A deployable photonic link including a deployable length of optical fiber and an interface module fusion spliced to at least one end of the optical fiber so that the module is directly connected to the fiber. The interface module including at least one of: an input for receiving a first electrical signal including a first radio frequency (RF) signal component; and an output for outputting a second RF signal component. The interface module further including, respectively, at least one of: a device for receiving the first electrical signal from the input and for producing an optical signal modulated with the first RF signal component for transmission in the optical fiber; and a device for receiving a modulated optical signal and for producing therefrom the second RF signal component for output at the output. An interface module may also contain both the input and the output and the devices for receiving RF signals and for receiving modulated optical signals.

Optical repeater system

The present invention relates to an optical relay system for transmitting multi-band frequency signals with limited bands by using optical lines. According to the present invention, a plurality of band-limited signals are band-combined into one signal by using a combiner, and the signals are transmitted through multiple outputs by using a distributor, and thus a multi-stage filter is not necessary. In addition, the present invention is capable of effectively solving various problems such as damage to the original signals caused by the band combination of the multi-stage filter, and there is no need to precisely connect each of the band-limited signals to the determined ports of the combiner and the signals can be connected to random ports, thereby improving convenience of use.

System and Method for Remotely Monitoring Communication Equipment and Signals

Several systems and method for remotely monitoring a communication system are disclosed. An RF signal received at a remote facility is analyzed at the remote facility and an ancillary data signal including information relation to at least one characteristic of the RF signal is generated. The ancillary data signal is modulated and combined with the RF signal. The combined RF signal is transmitted to a local facility in an optical form, where the ancillary data signal is recovered. An ancillary data signal block provides control signal in response to the local ancillary data signal. The control signals may be local control signals for controlling local devices or remote control signals for controlling devices at the remote facility. The ancillary data may include a power level of the RF signal and a version of the RF signal may be generated at the local facility with a power level approximately equal to the power level of the original RF signal.

Hearing aid system using wireless optical communications

Provided is a hearing aid system using a wireless optical communications method. The hearing aid system includes: a voice transmitter that converts addresser's voice into an optical signal to then transmit the converted optical signal; and a hearing aid that restores the optical signal received from the voice transmitter into the addresser's voice to then output the restored addresser's voice. Accordingly, the addresser's voice can directly be transmitted to the hard-of-hearing via wireless optical communications, to thereby prevent a voice discriminating power from lowering even in the case that ambient noise of an addresser as well as a listener is big.

Cell phone/internet communication system for rf isolated areas

A communication system for providing downlink and uplink communication between Service Providers, and users located in RF remotely located isolated areas, includes the sequential series connection of Service Provider signal sectors to Radio Interface Modules (RIM's), Service Combiner Units (SCU's), Fiber Transceiver Units (FTU's), Optical Multiplexer Units (OMU's), and Remote Fiber Nodes (RFN's), with only the RFN's being located in the RF isolated areas.

Optical communications system

An optical communications system ( 300, 400, 500 ) comprising a first transmit unit ( 301, 401, 402 ) and a first receive unit ( 302, 401, 402 ). The first transmit unit comprises an electro-optical modulator ( 311 ) for modulating one or more radio channels bearing electrical signals with a total bandwidth B by a laser signal ( 310 ) with a laser frequency f L1 , and the first transmit unit also comprises a transmit filter for outgoing signals from the electro-optical modulator. The first receive unit comprises an electro-optical demodulator ( 313 ) for demodulating the one or more electrical signals received from the first transmit unit by means of a Local Oscillator, LO ( 312 ), which produces an optical signal at a second frequency f L2 , and B ranges from the lower of f L1 and f L2 to the higher of f L1 and f L2 .

METHOD FOR TRANSMITTING FEEDBACK INFORMATION VIA A SPATIAL RANK INDEX (SRI) CHANNEL

A method for transmitting feedback information via a Spatial Rank Index (SRI) channel includes determining, at an access terminal, a value of a spatial rank index and transmitting, from the access terminal through the SRI channel, feedback information indicating the determined value of the spatial rank index according to a prescribed coding. The codeword of the prescribed coding is one of: (0,0,0,0,0,0,0,0), (1,0,1,0,1,1,0,1), (0,1,1,1,0,0,1,1), or (1,1,0,1,1,1,1,0). 1. A method for transmitting rank information at an access terminal , comprising:transmitting rank information indicating a value of a spatial rank index (SRI) through a spatial rank index (SRI) channel,wherein the value of the spatial rank index is encoded using a prescribed coding scheme, and (0,0,0,0,0,0,0,0),', '(1,0,1,0,1,1,0,1),', '(0,1,1,1,0,0,1,1), or', '(1,1,0,1,1,1,1,0)., 'wherein a codeword corresponding to the value of the spatial rank index is one of2. The method of claim 1 , wherein the prescribed coding scheme uses a (8 claim 1 , 2) code claim 1 , wherein the “8” represents a length of the codeword and the “2” represents a number of encoded information bits in the codeword.3. The method of claim 1 , wherein the codeword is:(0,0,0,0,0,0,0,0) when the value of the spatial rank index is 0,(1,0,1,0,1,1,0,1) when the value of the spatial rank index is 1,(0,1,1,1,0,0,1,1) when the value of the spatial rank index is 2, and(1,1,0,1,1,1,1,0) when the value of the spatial rank index is 3. This application is a continuation of U.S. application Ser. No. 12/845,632, filed Jul. 28, 2010, currently pending, which claims the benefit of U.S. Provisional Application Ser. No. 61/231,986, filed on Aug. 6, 2009, the contents of which are all hereby incorporated by reference herein in their entirety.The present invention generally relates to wireless communications, and in particular, to transmitting feedback information in a wireless communications channel.In the field of error correction coding, a binary ...

SUPPORTING VOICE FOR FLEXIBLE BANDWIDTH SYSTEMS

Methods, systems, and devices for supporting voice communications in a wireless communications system are provided. Some embodiments utilize multiple code channels to transmit the voice frames. These embodiments include parallel multi-code embodiments, offset multi-code embodiments, and multi-user multi-code embodiments. Some embodiments utilize flexible carrier bandwidths systems that may utilize portions of spectrum that may not be big enough to fit a normal bandwidth waveform. Some embodiments transmit and receive a subset of subframes of voice frames received over flexible bandwidth code channels. In some embodiments, a subset of subframes based on a flexible bandwidth scaling factor of one or more flexible bandwidth code channels is transmitted. The receiver may decode the voice frame based on the received subset of subframes. An outer loop power control set-point may be adjusted to provide a predetermined frame error rate based on the number of transmitted subframes. 1. A method for supporting voice over a wireless communications system , the method comprising:determining a plurality of code channels;generating a plurality of voice frames for transmission; andtransmitting the plurality of voice frames over the plurality of code channels.2. The method of claim 1 , further comprising:utilizing an offset between the plurality of code channels when transmitting the plurality of voice frames over the plurality of code channels.3. The method of claim 1 , further comprising:splitting one or more of the plurality of voice frames into a plurality of voice subframes, wherein transmitting the plurality of voice frames over the plurality of code channels comprises:transmitting the plurality of voice subframes for at least one of the plurality of voice frames over the plurality of code channels without an offset between the plurality of voice subframes.4. The method of claim 1 , wherein the wireless communications system comprises a flexible bandwidth system and the ...

METHOD OF GENERATING CODE SEQUENCE AND METHOD OF TRANSMITTING SIGNAL USING THE SAME

A method of generating a code sequence and method of adding additional information using the same are disclosed, by which a code sequence usable for a channel for synchronization is generated and by which a synchronization channel is established using the generated sequence. The present invention, in which the additional information is added to a cell common sequence for time synchronization and frequency synchronization, includes the steps of generating the sequence repeated in time domain as many as a specific count, masking the sequence using a code corresponding to the additional information to be added, and transmitting a signal including the masked sequence to a receiving end. 1. A method for transmitting a signal in a wireless communication system , the method comprising:transmitting a reference signal sequence to a receiving end, wherein:the reference signal sequence is given by repeating a base sequence at least twice and masking the repeated base sequence with an orthogonal code, andthe base sequence is CAZAC (constant amplitude zero auto-correlation) code.2. The method of claim 1 , wherein the orthogonal code is Hadamard code.3. The method of claim 1 , wherein the base sequence has a code length of a natural number L smaller than M in a manner of eliminating elements of a specific code sequence generated by a code generating algorithm enabling a length M claim 1 , andwherein M is a smallest prime number among natural numbers greater than L.5. An apparatus for transmitting a signal in a wireless communication system claim 1 , the apparatus comprising:a radio frequency (RF) module configured to transmit a reference signal sequence to a receiving end in the wireless communication system, wherein:the reference signal sequence is given by repeating a base sequence at least twice and masking the repeated base sequence with an orthogonal code, andthe base sequence is CAZAC (constant amplitude zero auto-correlation) code.6. The apparatus of claim 5 , wherein the ...

Hybrid Multi-Band Communication System

A communication system includes a hybrid signal transmitter incorporating a signal routing circuit and a driver circuit. The signal routing circuit is configured to receive a first input signal and route the first input signal through a first signal path when the frequency bandwidth of the input signal is lower than a threshold frequency and through a second signal path when the frequency bandwidth exceeds the threshold frequency. The second signal path includes a frequency down-converter circuit. The driver circuit is configured to receive the routed input signal via the first signal path or the second signal path, and convert the routed input signal into an optical signal for coupling into an optical fiber.

RFoG CPE Devices with Wavelength Collision Avoidance Using Laser Transmitter Local and/or Remote Tunability

Methods and apparatus are described for RFoG CPE devices with wavelength collision avoidance using local and/or remote tunability. A method includes tuning each of a plurality of optical transmitters to a plurality of non-overlapping frequency bands to avoid wavelength collisions in an upstream portion of a multipoint-to-point RFoG network where multiple optical transmitters from different RFoG CPE units transmit at the same time to a single shared optical receiver. 1. A method , comprising tuning each of a plurality of optical transmitters to a plurality of non-overlapping frequency bands to avoid wavelength collisions in an upstream portion of a multipoint-to-point RFoG network where multiple optical transmitters from different RFoG CPE units transmit at the same time to a single shared optical receiver.2. The method of claim 1 , wherein tuning includes local tuning.3. The method of claim 2 , wherein local tuning includes selecting an output frequency.4. The method of claim 3 , wherein selecting an output frequency includes setting a DIP switch.5. The method of claim 2 , further comprising remote tuning each of the plurality of transmitters.6. The method of claim 5 , wherein remote tuning includes selecting a heater set point and a thermoelectric cooler set point.7. The method of claim 1 , wherein tuning includes remote tuning.8. The method of claim 7 , wherein remote tuning includes selecting a heater set point and a thermoelectric cooler set point.9. The method of claim 7 , further comprising local tuning each of the plurality of transmitters.10. The method of claim 9 , wherein local tuning includes selecting an output frequency.11. The method of claim 10 , wherein selecting an output frequency includes setting a DIP switch.12. An apparatus claim 10 , comprising a plurality of optical transmitters that are tuned to a plurality of non-overlapping frequency bands to avoid wavelength collisions in an upstream portion of a multipoint-to-point RFoG network where ...

Distributed antenna system for mimo signals

A distributed antenna system includes a master unit configured to receive at least one set of multiple input multiple output (MIMO) channel signals from at least one signal source. The master unit is configured to frequency convert at least one of the MIMO channel signals to a different frequency from an original frequency, and combine the MIMO channel signals for transmission. An optical link couples the master unit with a remote for transceiving the MIMO channel signals. The remote unit is configured to receive the MIMO channel signals to be transmitted over antennas and includes an extension port configured to transceive at least one of the MIMO channel signals. An extension unit is coupled to the remote unit and is configured to frequency convert at least one of the first and second MIMO channel signals from the different frequency back to an original frequency for transmission over an antenna.

SYSTEM AND METHOD FOR MAINTAINING WIRELESS CHANNELS OVER A REVERSE LINK OF A CDMA WIRELESS COMMUNICATION SYSTEM

A subscriber access unit includes a transceiver for providing wireless communication of digital signals. The digital signals are communicated to a base station using at least one radio frequency (RF) channel via Code Division Multiple Access (CDMA) modulated radio signals defined by orthogonal codes. Orthogonal subchannels are made available by the base station within each CDMA RF channel. A bandwidth manager is connected to the transceiver, and when the transceiver is actively sending data, at least one orthogonal subchannel is allocated by the base station on an as-needed basis. The number of orthogonal subchannels being allocated changes during a given session. The transceiver, when powered on but not actively sending data, provides an idling mode connection on a reverse link. The idling mode connection is based on an orthogonal subchannel shared with at least one other subscriber access unit, but utilizes different time slots of the shared orthogonal subchannel. 1. A subscriber unit comprising:a transceiver configured to receive time interval assignment information; wherein the time interval assignment information indicates a burst pattern of time intervals for reverse link transmission; wherein each time interval includes at least one time slot;wherein the transceiver is further configured, on a condition that data is available to transmit, to transmit over a plurality of code channels in all time intervals; andwherein the transceiver is further configured, on a condition that no data available to transmit, to transmit a code channel, having the burst pattern, in at least one time interval and not transmit any code channels in other time intervals.2. The subscriber unit of wherein the transceiver is further configured on a condition that the transceiver is transmitting the code channel having the burst pattern and the subscriber unit has data to transmit claim 1 , to transmit over a plurality of code channels.3. The subscriber unit of wherein the code channel ...

Orthogonal frequency division multiple access time division multiple access-passive optical networks ofdma tdma pon architecture for 4g and beyond mobile backhaul

Systems and methods are provided for network communication using wireless base stations and an optical orthogonal frequency division multiple access (OFDMA) signal generated on an optical wavelength, with the optical OFDMA signal being composed of a plurality of OFDMA subcarriers. A multi-level modulator modulates each of the plurality of OFDMA subcarriers. A single optical wavelength propagates each of the plurality of OFDMA subcarriers to different base stations; a passive optical splitter delivers the optical OFDMA signal to different base stations; and an OFDMA subcarrier de-multiplexer delivers and extracts traffic for each of the base stations in an electronic-domain, wherein the extracted traffic is remodulated in a wireless signal format. Antennas at each of the base stations transmit wireless signals, and the wireless signals are recovered and processed from the base stations.

CARRIER EMBEDDED OPTICAL RADIO-SIGNAL MODULATION OF HETERODYNE OPTICAL CARRIER SUPPRESSION

Certain implementations of the disclosed technology may include systems, methods, and apparatus for carrier-embedded optical radio-over-fiber (RoF) communications. Example embodiments of the method may include modulating a baseband signal with and an intermediate frequency (IF) and a radio frequency (RF) carrier signal to produce a RF modulated optical signal, transmitting the RF modulated optical signal to a remote access point with an optical fiber, and detecting the transmitted RF modulated optical signal. The method may also include receiving a RF uplink signal and mixing a harmonic of the RF carrier signal with the received RF uplink signal to down-convert the received RF uplink signal to an IF uplink signal. The method may include modulating a second optical source with the IF uplink signal to produce an IF uplink optical signal, transmitting the IF uplink optical signal via an optical fiber, and detecting the IF uplink optical signal. 1. A method for providing carrier-embedded optical radio-over-fiber (RoF) communications , the method comprising:modulating, at a Radio-over-Fiber (RoF) Gateway Router, an electronic baseband signal with an intermediate frequency (IF) signal and a radio frequency (RF) carrier signal to produce a RF modulated optical signal;transmitting, by a first optical fiber, the RF modulated optical signal from the RoF Gateway Router to a remote access point;detecting, at the remote access point, the transmitted RF modulated optical signal to produce an electrical access point signal;filtering the access point signal to pass a harmonic of the RF carrier signal to an uplink section of the access point;receiving a RF uplink signal;mixing the harmonic of the RF carrier signal with the received RF uplink signal to down-convert the received RF uplink signal to an IF uplink signal;modulating a second optical source or light from the second optical source with the IF uplink signal to produce an IF uplink optical signal;transmitting, by a second ...

Active optical cable connector plug and active optical cable using same

An active optical cable connector plug includes: an electrical interface configured to connect to a first electronic device; an optical interface configured to connect to an optical cable, the optical cable being configured to connect to a second electronic device; an electrical-to-optical circuitry being connected with the electrical interface and the optical interface and configured to convert a received electrical signal to an optical signal; an optical-to-electrical circuitry being connected with the electrical interface and the optical interface and configured to convert a received optical signal to an electrical signal; a plug-in detection block being connected to the electrical interface and configured to detect the electrical properties of the first electronic device; a plug-in emulation block being connected to the electrical interface and configured to emulate the electrical properties of the second electronic device.

CONNECTOR SYSTEM, CONNECTING CABLE AND RECEIVING TOOL

A connector provided on a projector has an RF chip. A plug connected to the connector has an RF chip at a position opposite to the RF chip of the connector. When a protruding section of the plug is inserted and fit into an aperture section of the connector, the RF chip of the plug and the RF chip of the connector perform wireless communication with each other in a non-contact state. Thus, a connecting tool can be easily attached to/detached from a receiving tool without breaking a terminal due to contact such as in a case where a conventional contact type terminal is used. 1. A connector system comprising:a receiving unit; anda connecting unit connected to the receiving unit,the receiving unit having a first wireless communication section that performs wireless communication, wherein the first wireless communication section is configured to connect to a first converting circuit for converting a wired signal into a radio signal and for converting the radio signal into the wired signal, andthe connecting unit having a second wireless communication section that wirelessly communicates with the first wireless communication, wherein the second wireless communication section is configured to connect to a second converting circuit for converting the wired signal into the radio signal and for converting the radio signal into the wired signal.2. The connector system according to claim 1 , whereinthe connecting unit is connected to the receiving unit in a detachable manner.3. The connector system according to claim 1 , whereinthe second wireless communication section of the connecting unit comprises an electric-optical conversion section for converting an electric signal received from the first wireless communication section of the receiving unit into an optical signal.4. The connector system according to claim 3 , whereinthe connecting unit comprises an optical transmission path for transmitting the optical signal converted by the electric-optical conversion section.5. The ...

Power distribution module(s) capable of hot connection and/or disconnection for distributed antenna systems, and related power units, components, and methods

Power distribution modules capable of “hot” connection and/or disconnection in distributed antenna systems (DAS), and related components, power units, and methods are disclosed. The power distribution modules are configured to distribute power to a power-consuming DAS component(s), such as a remote antenna unit(s) (RAU(s)). By “hot” connection and/or disconnection, it is meant that the power distribution modules can be connected and/or disconnected from a power unit and/or a power-consuming DAS component(s) while power is being provided to the power distribution modules. Power is not required to be disabled in the power unit before connection and/or disconnection of power distribution modules. As a non-limiting example, the power distribution modules may be configured to protect against or reduce electrical arcing or electrical contact erosion that may otherwise result from “hot” connection and/or connection of the power distribution modules.

Small Form Factor, Pluggable, Analog Optical Transmitter and Host Module

A method includes hosting a plurality of transmitter modules with a host module, where the host module includes common circuitry shared by the plurality of pluggable transmitter modules. An apparatus includes a host module; and a plurality of transmitter modules coupled to the host module, where the host module includes common circuitry shared by the plurality of pluggable transmitter modules. 1. A method , comprising:hosting a plurality of transmitter modules with a host modulewherein the host module includes common circuitry shared by the plurality of pluggable transmitter modules.2. An apparatus , comprising:a host module; anda plurality of transmitter modules coupled to the host module,wherein the host module includes common circuitry shared by the plurality of pluggable transmitter modules.3. The apparatus of claim 2 , wherein the plurality of transmitter modules includes a plurality of reversibly pluggable analog optical transmitter modules that receive a broadband RF input and transmit a modulated optical signal over a fiber optic medium.4. The apparatus of claim 3 , wherein the plurality of reversibly pluggable analog optical transmitter modules accept at least one member selected from the group consisting of a mixture of analog (8 VSB modulated) channels in addition to QAM channels intended to transmit linear video claim 3 , SDV (switched digital video) claim 3 , VOD (video on demand) claim 3 , IPTV (internet protocol television) or DOCSIS (data over cable service interface specification) content.5. The apparatus of claim 3 , wherein the plurality of reversibly pluggable analog optical transmitter modules include a card-edge connector that support at least one function selected from the group consisting of DC power claim 3 , control claim 3 , broadband RF input claim 3 , signal conditioning claim 3 , impedance matching claim 3 , thermal electric cooler control claim 3 , stimulated Brillouin scattering suppression or hot swapping.6. The apparatus of claim 2 ...

Universal Host Module for a Pluggable Optical Transmitter

A method includes tuning a host module to a reference module standard; and adjusting each of a plurality of pluggable optical modules coupled to the host module to mimic the reference module standard for a set of load conditions. An apparatus includes a host module tuned to a reference module standard; and a plurality of pluggable optical modules coupled to the host module, wherein each of the plurality of pluggable optical modules mimics the reference standard for a specific set of load conditions. 1. A method , comprising:tuning a host module to a reference module standard; andadjusting each of a plurality of pluggable optical modules coupled to the host module to mimic the reference module standard for a set of load conditions.2. The method of claim 1 , wherein each of the plurality of pluggable optical modules includes a pluggable optical transmitter module whose performance parameters including laser chirp claim 1 , second order distortions claim 1 , third order distortions claim 1 , time dependant distortions claim 1 , time independent distortions respond the same as the reference laser module under the set of load conditions.3. An apparatus claim 1 , comprising:a host module tuned to a reference module standard; anda plurality of pluggable optical modules coupled to the host module, wherein each of the plurality of pluggable optical modules mimics the reference standard for a specific set of load conditions.4. The apparatus of claim 3 , wherein for each of the plurality of pluggable optical modules the host module includes a pre-distortion circuit and a non-linear fiber suppression circuit to individually tune each of the plurality of pluggable optical modules to the reference standard.5. The apparatus of claim 3 , wherein for each of the plurality of pluggable optical modules the host module includes a broadband RF signal input and an optical output.6. The apparatus of claim 3 , wherein each of the pluggable optical modules includes an optical device ...

PON Video Overlay Amplifier Circuit

An amplifier circuit in a PON and a method for using the same. The amplifier circuit may be used, for example in an ONU of the PON. In order to deal with varying customer requirements and the possibility of the ONUs or similar devices being installed at varying distances from the CO, a dynamically adjustable amplifier bias voltage is determined and applied to at least one amplifier in the amplifier circuit. The dynamic bias voltage is preferably a function of the input power to the ONU or the circuit output quality, or both. More than one dynamic bias voltage may be determined and applied in this fashion.

Photonically Enabled RF Transmitter/Receiver

A detection system includes a photonic module, a radio frequency (RF) module and processing circuitry. The photonic module may be configured to generate an optical tone for modulation in an optical domain prior to conversion to the RF domain. The RF module may be configured to interface with the photonic module to receive a transmission signal converted from the optical domain. The processing circuitry may be configured to interface with the photonic module and RF module to enable an operator to control of the photonic module and the RF module at least with respect to selectively determining a carrier frequency of the optical tone and a modulation technique to be employed with respect to the transmission signal converted from the optical domain. 1. A system comprising:a photonic module configured to generate an optical tone for modulation in an optical domain prior to conversion to a radio frequency (RF) domain;an RF module configured to interface with the photonic module to receive a transmission signal converted from the optical domain; andprocessing circuitry configured to interface with the photonic module and the RF module to enable an operator to control of the photonic module and the RF module at least with respect to selectively determining a carrier frequency of the optical tone and a modulation technique to be employed with respect to the transmission signal converted from the optical domain.2. The system of claim 1 , whereinthe processing circuitry is configured to interface with the photonic module and the RF module to enable the operator to perform software defined control of the photonic module and the RF module, andthe processing circuitry is configured to selectively determine the carrier frequency as a carrier frequency in the MHz range through the THz range.3. The system of claim 1 , wherein the photonic module comprises an optical-to-RF converter configured to employ photonic up-conversion onto a carrier during conversion from the optical domain ...

Switching and Routing Protocol for a Fiber Optic Transmission System

A system for transporting a plurality of analog and/or digital signals over an optical fiber can include one or more master modems for modulating digital signals and/or RF inserters modulating video signals. The RF signals from the modem(s)/RF inserters are up-converted resulting in frequency bands that are non-overlapping and are spaced apart within a single sub-octave. The sub-octave signal is then converted into an optical signal and directed onto an end of an optical fiber. At the downstream end of the optical fiber, the received optical signal is converted to an RF signal at an optical receiver. The RF signal is then filtered, down-converted and directed to a selected coaxial distribution unit. From the coaxial distribution unit, the RF signal is demodulated, e.g. at a slave modem, to recover the initial analog and/or digital signal. 1. A system for transporting a plurality of digital data signals , the system comprising:at least one RE inserter receiving a video signal and outputting an RF signal;an up-convertor system operating on at least one RE signal downstream of an RE inserter to output an RF signal having a frequency bandwidth within a single sub-octave;an optical transmitter converting a single sub-octave RE signal downstream of the up-convertor system into an optical signal and directing the optical signal into an optical fiber;an optical receiver downstream of the optical fiber converting the an optical signal to an RF signal; anda down-convertor system receiving an RE signal downstream of the optical receiver and outputting an RE signal having the video signal encoded thereon.2. A system as recited in further comprising at least one modem outputting a signal modulated with at least one digital signal and a modem receiving an RF signal having at least one digital signal encoded thereon downstream of the down-convertor system and outputting at least one digital signal.3. A system as recited in wherein the at least one modem outputting a signal ...

SYSTEMS, METHODS, AND DEVICES FOR INCREASING RADIO FREQUENCY (RF) POWER IN DISTRIBUTED ANTENNA SYSTEMS

A system, and related methods and devices, is disclosed for increasing an output power of a frequency band in a distributed antenna system that includes at least one RXU module that is operatively coupled to at least one RAU module. A first group of the plurality of channels within a first frequency band may be allocated to the RAU module, and a second group of the plurality of the channels within the first frequency band may be allocated to the RXU module. The at least one RAU module may be configured to receive RF signals from the first group of the plurality of channels being used in the first frequency band, and the at least one RXU module may be configured to receive RF signals from the second group of the plurality of channels being used in the first frequency band. In this manner, the amount of composite power per channel is increased. 1. A distributed antenna system , comprising:at least one remote antenna unit (RAU) module configured to receive radio frequency (RF) signals from a first group of a plurality of channels being used in a first frequency band supported by the distributed antenna system; andat least one remote expansion unit (RXU) module operatively coupled to the at least one RAU module and configured to receive RF signals from a second group of the plurality of channels being used in the first frequency band supported by the distributed antenna system.2. The distributed antenna system of claim 1 , wherein the at least one RAU module comprises at least one optical-to-electrical (O/E) converter configured to convert a downlink optical RF communications signal to a downlink electrical RF communications signal.3. The distributed antenna system of claim 2 , wherein the at least one RAU module further comprises at least one electrical-to-optical (E/O) converter configured to convert an uplink electrical RF communications signal to an uplink optical RF communications signal.4. The distributed antenna system of claim 1 , wherein the at least one RAU ...

SYSTEM FOR SIGNALS INDOOR DISTRIBUTION ON OPTICAL FIBER

A system for simultaneous indoor distribution of baseband digital signals (e.g Ethernet signals) and radiofrequency signals, the system comprising an Hybrid Optical Node and at least an Hybrid Switch/Hub node. The present invention solves the aforementioned problems proposing a system which simultaneously distributes the baseband digital data and the analog radiofrequency signals provided by a radio access node in an indoor environment by means of a Plastic Optical Fiber (POF) network. The main advantage of this invention is that it makes it possible to share a Plastic Optical Fiber infrastructure between a Local Area Network for data digital transmission, and the distribution of wireless radiofrequency signals, in particular DVB broadcast signals and Mobile Broadband signals like UMTS or LTE. 1. A system for simultaneous indoor distribution of baseband digital signals and radio frequency signals , the system comprising:At least a radiofrequency transmission-reception module configured for transmitting radiofrequency signals to an Optical Head Node and optionally receiving uplink radiofrequency signals from the Optical Head Node [{'b': 907', '1007, 'At least an analog tuner (, ) configured for selecting a frequency channel to filter the radiofrequency signal and converting the filtered signal to an intermediate frequency'}, {'b': 905', '1005, 'A baseband digital transmission-reception module (, ) configured for transmitting and receiving baseband digital signals'}, 'A multiplexer module configured for multiplexing the baseband digital signal and the radio frequency signal converted to intermediate frequency by the analog tuner and sending the multiplexed signal for transmission to an optical transmitter/receiver.', 'An optical transmitter/receiver configured for transmitting and receiving signals through a plastic optical fibre link, 'Where the Optical Head Node called Hybrid Optical Head Node, comprises At least an optical transmitter/receiver configured for ...

Optic distributed antenna system supporting multi-band multi-carrier service over a reduced number of optic core lines

An optic Distributed Antenna System includes a Head End (HE) configured to adjust a first signal for a first carrier at a first band to a first level, to adjust a second signal having at least a carrier different from the first carrier or a band different from the first band to a second level, to combine the first and second signals, to perform Electronic/Optic conversion on the combined signal, and to optic-distribute and send the combined optic signal, and a plurality of Remote Units (RUs) each connected to the HE over a corresponding single optic line, wherein each of the RUs is configured to perform Optic/Electronic conversion on the combined optic signal, to adjust the converted signal for each signal band, to perform high-power amplification on the adjusted signals, to multiplex the amplified signals, and to transmit the multiplexed signal to a Mobile station via at least one antenna.

Software configurable distributed antenna system and method for reducing uplink noise

A distributed antenna system includes a master unit including a downlink RF input operable to receive an RF input signal from a downlink port of a base station, a first optical port, and a second optical port. The distributed antenna system also includes a first remote unit coupled to the first optical port. The first remote unit comprises a downlink antenna port and a first uplink antenna port and a second remote unit coupled to the second optical port of the master unit. The second remote unit comprises a downlink antenna port and a second uplink antenna port. The master unit is operable to transmit a first RF signal associated with the first RF uplink signal to a first uplink port of the base station and transmit a second RF signal associated with the second RF uplink signal to a second uplink port of the base station.

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING BROADCAST CHANNEL IN CELLULAR COMMUNICATION SYSTEM

Provided is a method and apparatus for transmitting and receiving a Broadcast Channel (BCH) in a cellular communication system. The method for transmitting a BCH in a cellular communication system includes repeating symbols comprising information about the BCH, code-covering the repeated symbols with codes selected from a previously given code set, subcarrier-mapping the code-covered symbols, and transmitting the subcarrier-mapped symbols in one frame by using different beams corresponding to the selected codes. The codes are selected based on a number of repetitions, a cell identifier, and a beam index. 1. A method for transmitting a Broadcast Channel (BCH) in a cellular communication system , the method comprising:repeating symbols comprising information about the BCH;code-covering the repeated symbols with codes selected from a previously given code set;subcarrier-mapping the code-covered symbols; andtransmitting the subcarrier-mapped symbols in one frame by using different beams corresponding to the selected codes.2. The method of claim 1 , wherein the codes are selected from the code set according to a predefined rule based on a number of repetitions of the symbols claim 1 , a cell identifier of a cell in which the BCH is transmitted claim 1 , and a beam index used in transmission of the BCH.3. The method of claim 1 , wherein the subcarrier-mapped symbols are transmitted in a plurality of regions that are separated at equal intervals in the one frame by using different beams for the plurality of regions.4. The method of claim 1 , wherein the subcarrier-mapped symbols are transmitted in a plurality of consecutive regions of a forepart of the one frame by using different beams for the plurality of consecutive regions.5. The method of claim 1 , wherein the respective codes are selected by a code index calculated using:{'br': None, 'i': c', 'w', 'R,, 'Code =(IDcell+)mod'}wherein c indicates the code index, IDcell indicates a cell index of a cell in which the BCH is ...

Power distribution module(s) for distributed antenna systems, and related power units, components, systems, and methods

A power distribution module can be installed in and connected to a power unit for providing power to a power-consuming DAS component(s), such as a remote unit(s) (RU(s)) as a non-limiting example. The RU may include an antenna, and may sometimes be referred to as a remote antenna unit or RAU. Power from the power distribution module is distributed to any power-consuming DAS components connected to the power distribution modules including but not limited to remote units. The power distribution modules distribute power to the power-consuming DAS components to provide power for power-consuming components in the power-consuming DAS components. In a first configuration, the power distribution module uses two power links to provide power to a single RU. In a second configuration, the power distribution module uses two power links to provide power to two RUs.

OPTOELECTRONIC CIRCUIT AND A METHOD FOR THE TRANSMISSION OF AN OPTICAL CLOCK SIGNAL

An optoelectronic circuit for transmitting an optical clock signal to an electronic component contains a clock-generating device for the generation of an optical clock signal, a converter element for the conversion of the optical clock signal into an electrical clock signal supplied to the electronic component and an optical line from the clock-generating device to the conversion element. The optoelectronic circuit in this context provides a delay time of the optical clock signal from the clock-generating device to the conversion element. The optoelectronic circuit accordingly comprises an adjustable optical element for adjusting the delay time between the clock-generating device and the electronic component. 1. An optoelectronic circuit for transmitting an optical clock signal to an electronic component with:a clock-generating device for generating the optical clock signal,a converter element for converting the optical clock signal into an electrical clock signal supplied to the electronic component, andan optical line from the clock-generating device to the converter element,wherein the optoelectronic circuit provides an adjustable optical element for adjusting a delay time between the clock-generating device and the electronic component.2. The optoelectronic circuit according to claim 1 ,wherein the optical line is the adjustable optical element,wherein the delay time is adjustable by varying an optical length of the optical line,wherein the optical line provides at least one heating element for heating the optical line, andwherein the optical length of the optical line for adjusting the delay time is adjustable by heating the optical line.3. The optoelectronic circuit according to claim 1 ,wherein the optoelectronic circuit provides, connected in series to the optical line, a Kerr cell or a Pockels cell as the adjustable optical element, andwherein the delay time is adjustable by adjusting the optical length of the Kerr cell or the Pockels cell by applying an ...

Brillouin Strain and Temperature sensor incorporating a frequency offset locked DFB laser pair

A distributed fiber sensor system based on Brillouin scattering. Two DFB lasers are included that are frequency offset locked to each other. The frequency offset is approximately equal to the Brillouin shift in optical fibers of about 11 GHz. The locking is realized by first modulating the output of one DFB laser with an electro-optic modulator to generates side bands that are about 11 GHz from the carrier, and then by locking the other DFB laser to the upper side band with a PID controller which controls its driving current. 1. A fiber optic Brillouin distributed sensor comprising:a. Two distributed feedback (DFB) lasers;b. An electro-optic modulator;c. An electrical signal generator;d. An optical fiber coupler that combines two optical signals into one output;e. A photodiode that mixes the two optical signals from the optical fiber coupler, and that outputs the beat frequency of the two optical signals;f. A frequency discriminator that converts frequency into a proportional voltage;g. A proportional integral derivative (PID) controller to control the driving current of one of the two DFB lasers;h. A length of sensing fiber;i. An optical circulator;j. An optical receiver;k. A computer for signal processing and sensor control.2. The distributed sensor as in claim 1 , wherein said electrical signal generator drives said electro-optic amplitude of phase modulator that generates optical side bands with separations equal to the Brillouin frequency in said sensing optical fiber.3. The distributed sensor as in claim 1 , wherein said PID controller takes the output from said frequency discriminator as error signal to keep this signal at its possible minimum.4. The distributed sensor as in claim 1 , wherein a polarization scrambler minimizes polarization fluctuation induced sensor instability.5. The distributed sensor as in claim 1 , wherein one of said two DFB lasers works as a CW probe and the other works as a pulsed pump.6. The distributed sensor as in claim 1 , wherein ...

AUTOMATED PHYSICAL NETWORK MANAGEMENT SYSTEM UTILIZING HIGH RESOLUTION RFID AND OPTICAL SCANNING FOR RFID TAG SPATIAL LOCALIZATION

Apparatus and methods automatically track the physical connection configuration of fiber optic cables using high spatial resolution RFID tag readout and high-resolution optical scanning In further embodiments, the acquisition of s RFID and/or optical scans are performed by a robotic scanning system. 15-. (canceled)6. An RFID (radio frequency identification) tracking system for physical network connectivity assets within a data center , for automatically discovering and tracking a connection configuration for network cables terminated in connectors that are connected at their endpoints to specified receiving ports , the system comprising:one or more equipment racks including a plurality of networked devices therein with a plurality of receiving ports;one or more robot modules, each comprising a controller module, an actuable RFID probe, an optical scanner, a battery module, and a wireless communication module;a distributed multiplicity of the network cables, each cable including a miniature RFID tag with less than 5 mm readout range and attached in a vicinity of endpoint(s) of network cables;the actuable RFID probe being able to move in close proximity to each receiving port based upon pre-determined receiving port locations, such that RFID tag identifiers are read out; anda remote management server which includes data of the RFID tag identifiers associated with each cable, said identifiers providing data for said server for uniquely identifying a particular receiving port based upon data in a stored database of the receiving port locations.7. A system in accordance with claim 6 , further including one or more automated cross-connect switches with a multiplicity of receiving ports claim 6 , the one or more cross-connect switches being configured to launch an optical time domain reflectometer signal down any of the multiplicity of network cables to determine whether said cable is functional.8. A system in accordance with claim 6 , wherein said RFID tags are passive ...

DATA COMPRESSION METHOD AND DEVICE

The present disclosure relates to the field of mobile communications, and in particular, to a data compression method and device. In order to solve the problem of low compression efficiency in the prior art, the method comprises: sampling an obtained baseband signal and obtaining a number of discrete baseband signals to achieve an initial compression; calculating amplitude and phase values of each discrete baseband signal, on the basis of bit widths preset for the adjusted amplitude value and the phase value, carrying out a bit-truncating on the adjusted amplitude value and the phase value respectively, and combining the truncated phase value data and amplitude value data to obtain the final compressed discrete baseband signal. In this way, by truncating bits according to the preset bit width without distortion, the data bits of the baseband signal can be reduced accordingly, thereby reducing the amount of transmitted data, effectively improving the compression efficiency, and thus saving fiber resources. 1. A method for compressing data , the method comprising:obtaining a baseband signal;sampling obtained baseband signal to obtain several discrete baseband signals;calculating a phase and an amplitude of each of the discrete baseband signals, and adjusting the amplitude of each of the discrete baseband signals respectively so that adjusted amplitude satisfies a preset peak-to-average ratio; andperforming respectively for each of the discrete baseband signals operations of:bit-truncating the phase and the adjusted amplitude corresponding respectively to each of discrete baseband signals according to bit widths which are set respectively corresponding to the phase and the adjusted amplitude, and combining bit-truncated phase and bit-truncated amplitude into a compressed discrete baseband signal.2. The method according to claim 1 , wherein sampling the baseband signal to obtain the several discrete baseband signals comprises:sampling the baseband signal at a preset ...

OPTICAL WIRELESS COMMUNICATION SYSTEM, WIRELESS TRANSMITTING/RECEIVING APPARATUS AND OPTICAL WIRELESS COMMUNICATION METHOD

A wireless transmitter/receiver generates a first signal which notifies timing of a time slot allocated to each wireless station device, a conversion unit converts the first signal into an optical signal, and each of a plurality of antenna units converts the first signal from the optical signal into an electrical signal and transmits the electrical signal wirelessly. The wireless station device transmits a second signal at the timing reported by the first signal. Each of the plurality of antenna units converts the second signal wirelessly received from each wireless station device into an optical signal, and the conversion unit converts the second signal from the optical signal into an electrical signal. The wireless transmitter/receiver calculates, for each wireless station device, a transmission delay by using a difference between a reception time of the second signal and a reception time of a signal transmitted at the allocated timing by the wireless station device when it is assumed that there is no transmission delay. The wireless transmitter/receiver determines guard time between the time slots allocated to the wireless station devices based on the transmission delays of the wireless station devices. 1. An optical wireless communication system in which an exchange station device and a plurality of wireless station devices perform wireless communication , wherein the exchange station device includes: a plurality of antenna units which perform processing of wirelessly transmitting an electrical signal obtained by converting an optical signal input via an optical transmission line to each of the plurality of wireless station devices and processing of converting a wirelessly received signal from the wireless station device into an optical signal and outputting the optical signal to the optical transmission line; a wireless transmitter/receiver which performs generation processing of a signal addressed to the wireless station device and reception processing of a ...

OPTICAL FIBER MODULE

An optical fiber module includes: a casing; a first optical fiber having a portion in the casing; a first optical transmitter in the casing, wherein the first optical transmitter is configured to emit a first optical signal to the first optical fiber; a second optical fiber having a portion in the casing, wherein optical signals transmitted through the second optical fiber are independent from those transmitted through the first optical fiber; and a first optical receiver in the casing, wherein the first optical receiver is configured to receive a second optical signal from the second optical fiber. 1. An optical fiber module comprising:multiple electrical contacts arranged in a horizontal plane and configured for external connection of said optical fiber module;a first optical fiber;a first optical transmitter configured to convert a first electronic signal, from a first one of said electrical contacts, into a first optical signal to be transmitted through said first optical fiber;a second optical fiber configured to transmit optical signals independent from those transmitted by said first optical fiber; anda second optical transmitter configured to convert a second electronic signal, from a second one of said electrical contacts, into a second optical signal to be transmitted through said second optical fiber, wherein a third one of said electrical contacts is configured to deliver power to said first and second optical transmitters.2. The optical fiber module of claim 1 , wherein a fourth one of said electrical contacts is configured to connect to a common ground for said first and second optical transmitters.3. The optical fiber module of claim 1 , wherein a fourth one of said electrical contacts is configured to transmit information of indicating whether a light is emitted from said first optical transmitter.4. The optical fiber module of claim 1 , wherein a fourth one of said electrical contacts is configured to transmit information of controlling whether said ...

HYBRID ELECTRICAL-OPTICAL DATA COMMUNICATIONS CABLE WITH WIRELINE CAPACITANCE COMPENSATION

A communications cable is disclosed. The cable includes a first circuit configured to receive electrical data signals from a data source via an input connector, and convert the electrical data signals into optical signals for transmission by way of one or more optical fibers. The cable includes a second circuit configured to convert the optical signals received via the one or more optical fibers back to electrical data signals for providing to a data sink via an output connector. The cable includes a third circuit for applying pre- and post-signal conditioning to bi-directional control data for transmission to and received from the data sink via wires. The cable includes a fourth circuit for applying pre- and post-signal conditioning to bi-directional control data for transmission to and received from the data source via wires. The pre- and post-signal conditioning compensate for capacitance and/or resistance effects on the signals introduced by the wires. 1. A communications cable , comprising: connect to a data source;', 'receive a first set of electrical data signals from the data source;', 'receive a second set of electrical data signals from the data source; and', 'provide a third set of electrical data signals from a data sink to the data source;, 'an input connector configured to connect to the data sink;', 'provide the first set of electrical data signals to the data sink;', 'provide the second set of electrical data signals to the data sink; and', 'receive the third set of electrical data signals from the data sink;, 'an output connector configured toa plurality of optical fibers coupled to the input and output connectors;a plurality of electrical wires coupled to the input and output connectors;a first circuit configured to convert the first set of electrical data signals into optical signals for transmission to the output connector by way of the optical fibers, respectively;a second circuit configured to convert the optical signals received by way of the ...

STABILIZED MICROWAVE-FREQUENCY SOURCE

A microwave-frequency source at frequency fcomprises: a dual optical-frequency reference source, an electro-optic sideband generator, an optical bandpass filter, an optical detector, a reference oscillator, an electrical circuit, and a voltage-controlled oscillator (VCO). The sideband generator modulates dual optical reference signals at vand vto generate sideband signals at v±nfand v±nf. The bandpass filter transmits sideband signals at v+Nfand v−Nf. The optical detector generates a beat note at (v−Nf)−(v+Nf). The beat note and a reference oscillator signal are processed by the circuit to generate a loop-filtered error signal to input to the VCO. Output of the VCO at fdrives the sideband generator and forms the microwave-frequency output signal. The resultant frequency division results in reduced phase noise on the microwave-frequency signal. 1. A microwave-frequency source for generating an output electrical signal at an output frequency f , the microwave-frequency source comprising:{'sub': 'M', '(a) a voltage-controlled electrical oscillator arranged so as to generate a VCO output electrical signal at the frequency f, a first portion of which forms the output electrical signal of the microwave-frequency source;'}{'sub': 1', '2', '1, '(b) a dual optical-frequency reference source arranged so as to generate (i) a first optical reference signal at a first optical reference frequency vand (ii) a second optical reference signal at a second optical reference frequency v>v;'}{'sub': M', '1', 'M', '2', 'M, '(c) an electro-optic sideband generator arranged so as to (i) receive a second portion of the VCO output electrical signal at the frequency f, (ii) receive the first optical reference signal and generate therefrom a first set of multiple sideband optical signals at respective sideband optical frequencies centered at vand spaced by f, and (iii) receive the second optical reference signal and generate therefrom a second set of multiple sideband optical signals at ...

SAFETY POWER DISCONNECTION FOR POWER DISTRIBUTION OVER POWER CONDUCTORS TO POWER CONSUMING DEVICES

Safety power disconnection for remote power distribution in power distribution systems is disclosed. The power distribution system includes one or more power distribution circuits each configured to remotely distribute power from a power source over current carrying power conductors to remote units to provide power for remote unit operations. A remote unit is configured to decouple power from the power conductors thereby disconnecting the load of the remote unit from the power distribution system. A current measurement circuit in the power distribution system measures current flowing on the power conductors and provides a current measurement to the controller circuit. The controller circuit is configured to disconnect the power source from the power conductors for safety reasons in response to detecting a current from the power source in excess of a threshold current level indicating a load. 1. A power consuming unit , comprising:a remote power input coupled to a power conductor carrying current from a power distribution circuit; and the remote switch circuit configured to be closed to couple to the remote power input; and', 'the remote switch circuit further configured to be opened to decouple from the remote power input; and, 'a remote switch circuit comprising a remote switch input configured to receive a remote power connection signal;'}a switch control circuit coupled to the remote switch circuit and configured to periodically open the remote switch circuit to decouple from the remote power input; distribute one or more downlink communications signals received from one or more downlink communications links, to one or more client devices; and', 'distribute one or more uplink communications signals from the one or more client devices to one or more uplink communications links., 'the power consuming unit configured to2. The power consuming unit of claim 1 , wherein the power consuming unit further comprises a remote antenna unit within a distributed communications ...

OPTICAL ENGINES AND OPTICAL CABLE ASSEMBLIES CAPABLE OF LOW-SPEED AND HIGH-SPEED OPTICAL COMMUNICATION

Optical engines and optical cable assemblies incorporating optical engines capable of transmitting low-speed and high-speed signals over the same optical fibers are disclosed. In one embodiment, an optical engine includes a low-speed transmit (Tx) line, a low-speed receive (Rx) line, a high-speed data lane, an optical transceiver device, and a control circuit. The high-speed data lane includes a high-speed Tx lane and a high-speed Rx lane. A high-speed signal present on the high-speed Tx lane is converted to a high-speed optical signal at an optical Tx lane, and a high-speed optical signal received at an optical Rx lane is converted to a high-speed signal that is provided to the high-speed Rx lane. The control circuit selectively routes the low-speed Tx signal at the low-speed Tx line directly to the optical transceiver device in real time, and also routes a low-speed Rx signal from the transceiver to the low-speed Rx line.

INTERFACE CIRCUIT FOR COMMUNICATION, AND SYSTEM INCLUDING THE SAME

A system may include a processor and a memory. The processor and the memory may communicate through a wire bus. The memory may include a receiver configured to generate phase symbols based on states of the wire bus, and a decoding block configured to generate data based on a number of phase symbols successively inputted. 1. An interface circuit comprising:a decoding block configured to successively receive symbols and each of the symbols having phases, and generate data having a number of bits based on the symbols,wherein the decoding block provides a first phase and a third phase of a symbol which is inputted first, as first and second bits of the data, and provides first to third phases of a symbol which is inputted second, as third to fifth bits of the data.2. The interface circuit according to claim 1 ,wherein the decoding block is configured to successively receive 2 symbols and each of the symbols includes 3 phases, and generates the data having 5 bits based on the 2 symbols.3. The interface circuit according to claim 2 ,wherein the symbols comprise a plurality of symbols having different phases, andwherein, when 2 symbols having specified phases are successively inputted, the decoding block uses the 2 symbols as data masking information.4. The interface circuit according to claim 2 ,wherein the symbols comprise first to sixth symbols, andwherein the decoding block generates 32 different 5-bit data based on 32 combinations among combinations of the first to sixth symbols.5. The interface circuit according to claim 4 , wherein at least one of 4 remaining combinations among the combinations of the first to sixth symbols is used as data masking information.6. The interface circuit according to claim 1 , wherein claim 1 , when a symbol having specified phases is inputted first claim 1 , the decoding block provides first and third phases of a symbol which is inputted second claim 1 , as the first and second bits of the data claim 1 , and provides a first level as ...

Communication System Multiplexing and Demultiplexing Apparatus and Methods

Communication signal multiplexing apparatus () comprising: a first optical receiver () configured to receive an optical analog radio signal and to convert it into a corresponding electrical analog radio signal having a carrier frequency; a second optical receiver () configured to receive an optical digital communication signal and to convert it into a corresponding electrical digital communication signal having a frequency spectrum; first electrical filter apparatus () configured to receive the electrical digital communication signal, comprising a low-pass filter having a cut-off frequency lower than the carrier frequency of the electrical analog radio signal, and configured to apply the low-pass filter to the electrical digital communication signal; signal combining apparatus () configured to combine the low-pass filtered electrical digital communication signal with the electrical analog radio signal to form a combined electrical signal; and an optical transmitter () configured to generate an optical communication signal carrying a representation of the combined electrical communication signal. 119-. (canceled)20. A communication signal multiplexing apparatus comprising:a first optical receiver configured to receive an optical analog radio signal and to convert the optical analog radio signal into a corresponding electrical analog radio signal having a carrier frequency;a second optical receiver configured to receive an optical digital communication signal and to convert the optical digital communication signal into a corresponding electrical digital communication signal having a frequency spectrum;a first electrical filter apparatus comprising a low-pass filter having a cut-off frequency lower than the carrier frequency of the electrical analog radio signal, wherein thea first electrical filter apparatus is configured to receive the electrical digital communication signal and to apply the low-pass filter to the electrical digital communication signal;signal ...

DUAL POLARIZATION VECTOR SIGNAL GENERATION AND DETECTION

A scheme for generating, transmitting and receiving dual-polarization asymmetric single sideband photonic vector signal at millimeter wave spectral region is described. At a transmitter, information bits to be transmitted are modulated using a vector modulation technique to generate a baseband signal. The baseband signal is converted into its single sideband (SSB) version using a complex frequency source having a first frequency. Two IQ signals are generated using an integrated dual polarization IQ modulator. The I/Q modulator is driven by a laser source at frequency fc. The resulting signal is transmitter over an optical transmission medium and/or a multi-input, multi-output over the air antenna configuration, upconverted by a single-ended photodiode to a desired radio-frequency (RF) carrier frequency. 1. A method of optical communication , implemented at a transmitter in an optical communication network , comprising: receiving a first sequence of information bits;', 'vector-modulating the first sequence of information bits,, 'operating a first IQ modulator for mixing the first stream of vector-modulated symbols with a lower side band (LSB) carrier having a first frequency to generate a complex vector-modulated LSB signal;', 'generating a first I-component signal by adding an imaginary part of the vector-modulated LSB signal with an imaginary part of an upper side band (USB) carrier having a second frequency;', 'generating a first Q-component signal by adding a real part of the vector-modulated LSB signal with a real part of the upper side band (USB) carrier having the second frequency;, 'thereby creating a first stream of vector-modulated symbols;'} receiving a second sequence of information bits;', 'vector-modulating the second sequence of information bits,, 'operating, simultaneously with the first IQ modulator, a second IQ modulator for mixing the second stream of vector-modulated symbols with another lower side band (LSB) carrier having the first frequency to ...

OPTICAL TRANSCEIVER MODULE FOR COMMUNICATIONS IN DAS SYSTEMS

The optical transceiver module installable on the Master Unit side of a DAS system connectable to a plurality of Remote Units, comprises an uplink connector and a downlink connector connectable to a radio base station, first and second optical connectors connectable to the Remote Units, a downlink path for the connection between the downlink connector and the first and second optical connector, and an uplink path for the connection between the uplink connector and the first and second optical connectors, wherein the uplink path comprises a first coupler of the WDM type and a second coupler of the WDM type connected, respectively, to the first optical connector and to the second optical connector, and wherein the uplink path comprises first and second demultiplexers connected, respectively, to the outputs of the first coupler and of the second coupler and adapted to separate the optical signals coming from the Remote Units. 1. An optical transceiver module for communications in DAS (Distributed Antenna System) systems , installable on the Master Unit side of a DAS system connectable to a plurality of Remote Units , comprising:at least one uplink connector and at least one downlink connector connectable to at least one radio base station;at least a first optical connector and at least a second optical connector connectable to said Remote Units;at least one downlink path for the connection between said downlink connector and said first and second optical connector; andat least one uplink path for the connection between said uplink connector and said first and second optical connector,wherein said uplink path comprises at least a first coupler of the WDM type and at least a second coupler of the WDM type connected, respectively, to said first optical connector and to said second optical connector,wherein said uplink path comprises at least a first demultiplexer and a second demultiplexer connected, respectively, to the outputs of said first coupler and of said second ...

DRIVER FOR MULTI-STAGE WAVE GUIDE MODULATOR AND METHOD

A modular hub driver architecture may include a multi-delay block configured to provide an enhanced delay match among N distinct stages of a distributed modulating electro-optical interface core. The electro-optical multi-core modulator driver may include an input impedance matching stage and a pre-conditioning circuit configured to generate a number M, an integer divisor of N, of delayed replicas of an electrical modulating signal. The electro-optical multi-core modulator may include an array of M launch buffers of the replica signals, and an array of M multi-delay blocks, each including delay circuit modules differently cascaded on distinct signal paths, and configured to receive, at respective inputs, the M replica signals and to output N/M differently delayed replicas of the input signals, each driving a correspondent output stage of one on the N electro-optical interface cores. 19-. (canceled)10. A driver for a number N of electro-optical interface cores each driven by a respective output stage of a multi-stage electro-optical modulator , the driver configured to receive an electrical modulating signal at an input and comprising:an input impedance matching stage;a pre-conditioning circuit configured to generate a number M, of delayed replicas of the electrical modulating signal, wherein M is an integer divisor of the number N of cores;an array of M launch buffers of the replica signals; andan array of M multi-delay blocks, each multi-delay block comprising a plurality of delay circuits differently cascaded on distinct signal paths, said array of M multi-delay blocks configured to receive, at respective inputs, the M replica signals, and to output N/M differently delayed replicas of the M replica signals, and each driving a corresponding output stage of one on said N electro-optical interface cores.11. The driver of claim 10 , wherein said plurality of delay circuits is configured to produce a delay of the electrical modulating signal claim 10 , the delay being ...

COHERENT TRANSPONDER WITH ENHANCED FREQUENCY LOCKING

The present document relates to an optical communication system. In particular, the present document relates to the alignment of the laser frequency at a transmitter of the optical communication system and the local oscillator frequency at a coherent receiver of the optical communication system. A coherent optical receiver () is described. The receiver () comprises a reception unit adapted to convert a received optical signal at a carrier frequency into a digital signal using a local oscillator, referred to as LO, having an LO frequency; a spectral analysis unit adapted to estimate a degree of asymmetry of a spectrum of the received optical signal, based on the digital signal; and a transmission unit adapted to transmit an indication of the degree of asymmetry to a near-end transponder () comprising a transmitter () of the received optical signal. 1. A coherent optical receiver , comprisinga reception unit adapted to convert a received optical signal from a transmitter at a carrier frequency into a digital signal using a local oscillator, referred to as LO, having an LO frequency;a spectral analysis unit adapted to estimate a degree of asymmetry of a spectrum of the received optical signal, based on the digital signal; anda transmission unit adapted to transmit an indication of the degree of asymmetry to a near-end transponder comprising said transmitter of the received optical signal.2. The optical receiver of claim 1 , comprisinga frequency offset unit adapted to estimate and compensate an offset between the carrier frequency and the LO frequency.3. The optical receiver of claim 2 , whereinthe reception unit comprises an optical-to-digital converter having a converter bandwidth and a center frequency; andthe frequency offset unit is adapted to prevent truncations of the spectrum of the received optical signal caused by the converter bandwidth, by compensating the offset between the carrier frequency and the LO frequency.4. The optical receiver of claim 1 , ...

TIMING MEASUREMENT APPARATUS

Methods, devices and systems for providing accurate measurements of timing errors using optical techniques are described. An example timing measurement device includes an optical hybrid that receives two optical pulse trains and produces two or more phase shifted optical outputs. The timing measurement device further includes two or more optical filters that receive the outputs of the optical hybrid to produce multiple pulse signals with distinctive frequency bands. The device also includes one or more photodetectors and analog-to-digital converters to receive to produce electrical signals in the digital domain corresponding to the optical outputs of the hybrid. A timing error associated with the optical pulse trains can be determined using the electrical signals in digital domain based on a computed phase difference between a first frequency band signal and a second frequency band signal and a computed frequency difference between the first frequency band signal and the second frequency band. 1. A timing measurement apparatus , comprising:an optical hybrid configured to receive two optical pulse trains as inputs and produce two or more optical outputs that are each phase shifted with respect to one another;two or more optical filters each coupled to the optical hybrid to receive an output from the optical hybrid, the two or more optical filters configured to produce multiple pulse signals with distinctive frequency bands;one or more photodetectors positioned to receive and convert each of the multiple optical signals produced by the two or more optical filters to an associated electrical signal; andone or more analog-to-digital converters coupled to the one or more photodetectors to convert the plurality of electrical signals into a plurality of digital signals corresponding to the outputs of the two or more optical filters, wherein processing of the plurality of digital signals enables a determination of a timing error associated with the two optical pulse trains ...

THREE DIMENSIONAL LAYOUT HIGH GAIN RF FRONT END APPARATUS

The present disclosure relates to a three-dimensional-layout high gain radio-frequency front end apparatus, including an antenna device and a radio-frequency transceiver device. The antenna device includes two or more antenna array layers arranged in layers. The radio-frequency transceiver device includes a filter, a circulator, a receiver and a transmitter. The antenna array layer is connected to a filter. The filter is connected to a circulator by an optical fiber, and the circulator is connected to a receiver and a transmitter respectively by an optical fiber. 1. A three-dimensional layout RF front end apparatus , comprising:an antenna device comprising two or more stacked antenna array layers;an RF transceiver device comprising a filter, a circulator, a receiver, and a transmitter, the antenna array layer being connected to the filter, the filter being connected to the circulator by an optical fiber, and the circulator being connected to the receiver and the transmitter respectively by an optical fiber.2. The three-dimensional layout RF front end apparatus according to claim 1 , wherein the antenna array layer comprises a substrate and an antenna array claim 1 , the antenna array is disposed on the substrate and connected to the filter.3. The three-dimensional layout RF front end apparatus according to claim 2 , wherein the antenna array is a dual polarization planar array.4. The three dimensional layout RF front end apparatus according to claim 3 , wherein the dual polarization planar array comprises a plurality of dual polarization oscillators claim 3 , the dual polarization oscillators are arranged orthogonally with positive and negative polarization of 45 degrees.5. The three dimensional layout RF front end apparatus according to claim 4 , wherein the antenna array layer further comprises a combiner claim 4 , each dual polarization oscillator in the antenna array is connected to the filter by the combiner.6. The three dimensional layout RF front end ...

Communications device with optical injection locking source and related methods

A communications device may include a remote device having a first E/O modulator to modulate an optical carrier signal with an input signal having a first frequency, an optical waveguide coupled to the remote device, and a local device coupled to the optical waveguide. The local device may include an optical source to generate the optical carrier signal, a second E/O modulator to modulate the optical carrier signal with a reference signal to generate a modulated reference signal, an OIL source coupled to the second E/O modulator and to amplify the modulated reference signal, and an O/E converter coupled to the OIL source and to generate an output signal including a replica of the input signal at a second frequency based upon the reference signal.

HYBRID LASER ANTI-CLIPPING FOR FIBER-COAXIAL NETWORKS

Systems, devices, and methods for hybrid anti-clipping in optical links in hybrid fiber-coaxial (HFC) networks are disclosed. A hybrid anti-clipping circuit can be included in both the uplink and downlink paths of the HFC network to avoid driving the laser in the optical link above a clipping threshold. The anti-clipping circuit can compare the average, or RMS, input power level and the power envelope of a RF input signal to a clipping threshold associated with the particular laser module being used. If the average power is above the clipping threshold, then the input signal can be attenuated proportionally to avoid clipping. If peaks in the power envelope are above the clipping threshold, then the bias current of the laser module can be adjusted to avoid clipping. Accordingly, the modes of anti-clipping circuit operation include applying attenuation to the input signal and/or adjusting the laser module bias current. 1. A device for generating an optical communication signal comprising:a coupler that splits an input signal into a first signal and a second signal;an envelope tracker that generates an envelope tracking signal proportional to a time varying power envelope of the first signal;an average power detector that generates an average power signal corresponding to an average power of the first signal;a microcontroller to generate a plurality of control signals based on the envelope tracking signal and the average power signal;a variable attenuator coupled to the coupler to generate an attenuated signal corresponding to the second signal in response to a first control signal in the plurality of the control signals;a laser bias controller that generates a laser bias current in response to a second control signal in the plurality of the control signals; anda laser module coupled to the variable attenuator and the laser bias controller that generates the optical communication signal corresponding to the input signal and in response to the attenuated signal and the ...

FIBER TO THE ANTENNA

A cell site includes a tower, a multi-service terminal mounted to the tower and a base transceiver station in communication with the multi-service terminal. The multi-service terminal includes a housing and a plurality of adapters mounted to the housing. Each of the adapters includes an outer port accessible from outside the housing and an inner port accessible from inside the housing. 1. (canceled)2. A cell site of a telecommunications network comprising:a tower;an environmentally sealed housing mounted to the tower;a multi-fiber cable routed up the tower and into the sealed housing through a cable port, the multi-fiber cable defining a plurality of optical lines that are broken out within the sealed housing;a plurality of remote transceivers in optical communication with the optical lines; anda base transceiver station in optical communication with the multi-fiber cable.3. The cell site of claim 2 , wherein the sealed housing is mounted to a top portion of the tower.4. The cell site of claim 2 , wherein the sealed housing includes a cable spool disposed on an exterior of the sealed housing.5. The cell site of claim 2 , wherein the cell site includes an enclosure in communication with the sealed housing and the base transceiver station.6. The cell site of claim 5 , wherein the enclosure includes a housing defining an interior region claim 5 , a fiber optic cable stub being disposed in the interior region claim 5 , the fiber optic cable stub having a first end portion and an oppositely disposed second end portion claim 5 , the first end portion including a multi-fiber connector claim 5 , the second end portion including a plurality of single fiber connectors.7. The cell site of claim 6 , wherein a connectorized end of a fiber optic cable of the sealed housing is optically connected to the multi-fiber connector in the interior region of the enclosure.8. The cell site of claim 5 , wherein the enclosure includes a housing and a cable spool disposed on an exterior ...

Method, System, and Transceiver Device for Bi-Directionally Transmitting Digital Optical Signals Over an Optical Transmission Link

A method for bi-directionally transmitting digital optical signals over an optical transmission link in which a first optical transmit signal is created according to a first binary digital signal in such a way that the bit information of the first binary digital signal is included in first sections of the symbol interval of the first optical transmit signal. A second optical transmit signal is created by creating an optical wavelength reuse signal using the first optical transmit signal received at the second end of the optical transmission link, the optical wavelength reuse signal being modulated according to a second digital signal in such a way that the bit information of the second digital signal is included in second sections of the symbol interval of the first optical transmit signal received. 1. Method for bi-directionally transmitting digital optical signals over an optical transmission link , the method including:(a) supplying a first optical transmit signal at a predetermined optical wavelength to a first end of the optical transmission link and transmitting the first optical transmit signal in a first transmission direction to a second end of the optical transmission link, the first optical transmit signal being created according to a non-return-to-zero first binary digital signal and comprising an optical bit-interleaved seeding signal having a symbol rate equal to a bit rate of the first binary digital signal and wherein the symbol interval of the optical bit-interleaved seeding signal is divided into two equally long sub-intervals, the bit information of the first binary digital signal being transported in a first of the two sub-intervals and the second sub-intervals being set to a seeding level with respect to optical power of the first optical transmit signal; and(b) supplying a second optical transmit signal at the predetermined optical wavelength to the second end of the optical transmission link and transmitting the second optical transmit signal ...

IMPULSE RESPONSE FILTERING OF CODE DIVISION MULTIPLEXED SIGNALS IN A CAPACITIVE SENSING DEVICE

An example method of capacitive sensing includes: receiving at least one code division multiplexed (CDM) signal transmitted from different transmitters using different codes over a plurality of signal bursts, wherein a length of each of the different codes is equal to or greater than a number of the different transmitters; filtering the at least one CDM signal using an impulse response filter, wherein the filtering comprises: accumulating the at least one CDM signal over the plurality of signal bursts to obtain measurements of the at least one CDM signal; and for the measurements of the at least one CDM signal, applying different filter weights to the resulting signals over a number of the plurality of signal bursts that is greater than the length of the different codes. 1. A method for digital signal processing (DSP) , comprising:receiving at least one code division multiplexed (CDM) signal transmitted from different transmitters using different codes over a plurality of signal bursts, wherein a length of each of the different codes is equal to or greater than a number of the different transmitters; accumulating the at least one CDM signal over the plurality of signal bursts to obtain measurements of the at least one CDM signal; and', 'for the measurements of the at least one CDM signal, applying different filter weights over a number of the plurality of signal bursts that is greater than the length of the different codes., 'filtering the at least one CDM signal using an impulse response filter, wherein the filtering comprises2. The method of claim 1 , wherein:the impulse response filter is a triangular finite impulse response (FIR) filter, andthe different filter weights are applied according to a triangular pattern over the number of the plurality of signal bursts.3. The method of claim 1 , wherein:the length of each of the different codes is n signal bursts, andthe number of the plurality of signal bursts over which the filter weights are applied is equal to 2n ...

HIGH-BANDWIDTH UNDERWATER DATA COMMUNICATION SYSTEM

An apparatus is described which uses directly modulated InGaN Light-Emitting Diodes (LEDs) or InGaN lasers as the transmitters for an underwater data-communication device. The receiver uses automatic gain control to facilitate performance of the apparatus over a wide-range of distances and water turbidities. 120.-. (canceled)21. A system to perform seismic exploration in an aqueous medium , comprising:a plurality of ocean bottom seismometer (OBS) units disposed in the aqueous medium, each of the plurality of OBS units comprising a detector and a wake-up system;an underwater vehicle to provide an indication to at least one of the plurality of OBS units; and receive the indication from the underwater vehicle;', 'provide, responsive to receipt of the indication from the underwater vehicle, an indication to the wake-up system; and', 'transmit, responsive to validation of an optical communication link by the wake-up system, seismic data to the underwater vehicle via the optical communication link., 'the at least one of the plurality of OBS units to22. The system of claim 21 , comprising:the detector comprising a photodetector to detect light from the underwater vehicle and provide the indication to the wake-up system responsive to detection of the light.23. The system of claim 21 , comprising:the detector comprising a motion detector to detect motion from the underwater vehicle and provide the indication to the wake-up system responsive to detection of the motion.24. The system of claim 21 , comprising:the detector comprising an acoustic detector to detect sound from the underwater vehicle and provide the indication to the wake-up system responsive to detection of the sound.25. The system of claim 21 , comprising:a detector to provide an indication to a wake-up system to turn on one or more of a storage and control system, a sensor, or an optical transmitter.26. The system of claim 21 , comprising:the wake-up system operational to communicate, responsive to the ...

DISTRIBUTED ANTENNA SYSTEM HAVING REMOTE UNITS WITH SCANNING RECEIVERS

The system and method for ameliorating the effect of close-in user equipment up to a point where the user equipment itself limits the performance. The system and method utilizes a digital filter in front of the LASER modulator being applied to the LASER. Additionally, total power detectors may be used at input to prevent unwanted signals from overloading stages in front of the LASER. The system further includes a scanning receiver capable of scanning and analyzing the wide-band signal received from user equipment in the uplink direction. 1. A distributed antenna system (DAS) remote unit (RU) comprising:a radio frequency transceiver (RF) capable of receiving and transmitting RF signals to a plurality of user equipment (UE) transceivers via one or more antennas;a communication channel connected to the one or more antennas and capable of transporting a wideband RF signal to and from the one or more antennas, the wideband RF signal being divided into a plurality of sub-bands, each sub-band carrying traffic of a particular wireless service provider to and from associated UE;an analog to digital converter connected to the communication channel;a digital filter connected to the analog to digital converter;a digital to analog converter connected to the digital filter.2. The RU of claim 1 , further comprising a laser having an electrical power input connected to the digital to analog converter via a modulator and an optical output connected to an optical communication channel.3. The RU of claim 1 , further comprising a front end attenuator connected between the one or more antennas and the analog to digital converter.4. The RU of claim 1 , wherein the digital filter is implemented claim 1 , at least in part claim 1 , in a field programmable gate array (FPGA).5. The RU of claim 4 , wherein the FPGA is programmed to provide an individual level of attenuation to a signal on each of the plurality of sub-bands.6. The RU of claim 1 , further including a scanning receiver connected ...

REDUCING LOCATION-DEPENDENT DESTRUCTIVE INTERFERENCE IN DISTRIBUTED ANTENNA SYSTEMS (DASS) OPERATING IN MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) CONFIGURATION, AND RELATED COMPONENTS, SYSTEMS, AND METHODS

Components, systems, and methods for reducing location-dependent destructive interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration are disclosed. Interference is defined as issues with received MIMO communications signals that can cause a MIMO algorithm to not be able to solve a channel matrix for MIMO communications signals received by MIMO receivers in client devices. These issues may be caused by lack of separation (i.e., phase, amplitude) in the received MIMO communications signals. Thus, to provide amplitude separation of received MIMO communications signals, multiple MIMO transmitters are each configured to employ multiple transmitter antennas, which are each configured to transmit in different polarization states. In certain embodiments, one of the MIMO communications signals is amplitude adjusted in one of the polarization states to provide amplitude separation between received MIMO communications signals. In other embodiments, multiple transmitter antennas in a MIMO transmitter can be offset to provide amplitude separation. 1. A multiple-input , multiple-output (MIMO) remote unit configured to wirelessly distribute MIMO communications signals to wireless client devices in a distributed antenna system , comprising:a first MIMO transmitter comprising: a first MIMO transmitter antenna configured to transmit MIMO communications signals in a first polarization and a second MIMO transmitter antenna configured to transmit MIMO communications signals in a second polarization different from the first polarization;a second MIMO transmitter comprising a third MIMO transmitter antenna configured to transmit MIMO communications signals in the first polarization and a fourth MIMO transmitter antenna configured to transmit MIMO communications signals in the second polarization; receive a first downlink MIMO communications signal at a first amplitude over a first downlink communications medium, and transmit the first ...

DIRECTIONAL MULTIBAND ANTENNA

There is disclosed a directional multi-band antenna comprising a substrate structure, a plurality of RF units arranged at the substrate structure to provide an RF phased array, the RF phased array having an angular scan range, an array of optical units arranged at the substrate structure and interspersed amongst the RF units, an array of optical lensing devices supported over the substrate structure, the array of optical lensing devices being substantially RF transmissive and being arranged to correspond with the arrangement of the optical units, such that each optical unit may communicate light signals with an associated optical lensing device so as to communicate light signals along an optical axis within the angular scan range of the RF phased array 1. A directional multi-band antenna comprising:a substrate structure;a plurality of radio frequency (RF) units arranged at the substrate structure to provide an RF phased array, the RF phased array having an angular scan range;an array of optical units arranged at the substrate structure and interspersed amongst the RF units; andan array of optical lensing devices supported over the substrate structure, the array of optical lensing devices being substantially RF transmissive and being arranged to correspond with the arrangement of the optical units, such that each optical unit may communicate light signals with an associated optical lensing device so as to communicate light signals along an optical axis within the angular scan range of the RF phased array.2. An antenna according to wherein at least one optical unit within the array of optical units claim 1 , is a multi-fibre optical unit comprising a plurality of optical fibres arranged substantially in parallel with each other claim 1 , and which optical fibres terminate in a plane substantially normal to the optical axis claim 1 , the terminating plane facing an associated optical lensing device of the array of optical lensing devices.3. An antenna according to ...

TUNABLE RF FILTER DEVICE USING OPTICAL WAVEGUIDES WITH DISPERSION SLOPES OF OPPOSITE SIGNS AND RELATED METHODS

A tunable Radio Frequency (RF) filter device includes a tunable optical source configured to generate an optical carrier signal, and a modulator coupled to the tunable optical source and configured to modulate the optical carrier signal with an RF input signal. The tunable RF filter device may also include first and second optical waveguides coupled to the modulator and having first and second dispersion slopes of opposite sign, and an optical-to-electrical converter coupled to the first and second optical waveguides and configured to generate an RF output signal with a frequency notch therein based upon the tunable optical source. 115-. (canceled)16. A method of Radio Frequency (RF) filtering comprising:generating an optical carrier signal using a tunable optical source;modulating the optical carrier signal with an RF input signal using a modulator coupled to the tunable optical source and first and second optical waveguides coupled to the modulator and having first and second dispersion slopes of opposite sign; andgenerating an RF output signal with at least one frequency notch therein based upon the tunable optical source using an optical-to-electrical converter coupled to the first and second optical waveguides and based upon the first and second dispersion slopes being of opposite sign.17. The method of further comprising tuning a frequency of the optical carrier signal over a desired frequency range.18. The method of further comprising tuning the frequency of the optical carrier signal to generate the RF output signal with the at least one frequency notch therein by causing interference between outputs of the first and second optical waveguides.19. The method of wherein the first and second dispersion slopes intersect at a desired frequency point in the desired frequency range.20. The method of further comprising generating the optical carrier signal using a tunable continuous wave laser.21. The method of further comprising receiving the RF input signal with ...

Power distribution module(s) for distributed antenna systems, and related power units, components, systems, and methods

A power distribution module can be installed in and connected to a power unit for providing power to a power-consuming DAS component(s), such as a remote unit(s) (RU(s)) as a non-limiting example. The RU may include an antenna, and may sometimes be referred to as a remote antenna unit or RAU. Power from the power distribution module is distributed to any power-consuming DAS components connected to the power distribution modules including but not limited to remote units. The power distribution modules distribute power to the power-consuming DAS components to provide power for power-consuming components in the power-consuming DAS components. In a first configuration, the power distribution module uses two power links to provide power to a single RU. In a second configuration, the power distribution module uses two power links to provide power to two RUs.

ADAPTIVE DISTRIBUTED ANTENNA SYSTEM CAPABLE OF LOAD BALANCING

An adaptive distributed antenna system comprises a control module coupled between multiple base stations, and multiple antenna groups, each of which includes multiple antenna devices each coupled to the control module via a transmission line, and operable to convert an external wireless signal and a transmitting signal from the transmission line respectively into a receiving signal and a signal to be radiated. The control module converts a downlink signal from any base station and the receiving signal from any transmission line respectively into the transmitting signal and an uplink signal. The control module is configured to establish a transmission link between one base station and one antenna device of the antenna groups. 1. An adaptive distributed antenna system comprising:a plurality of base stations;a plurality of antenna groups each including a transmission line, and a plurality of antenna devices, each of which is coupled to said transmission line and is operable to convert any wireless signal received thereby into a signal serving as a receiving signal to be fed into said transmission line, and to convert any transmitting signal transmitted from said transmission line into a signal to be radiated; anda control module coupled between said base stations and said transmission lines of said antenna groups, said control module being operable to convert a downlink signal from any one of said base stations into a signal serving as the transmitting signal to be fed into said transmission line of one of said antenna groups, and to convert the receiving signal transmitted from said transmission line of anyone of said antenna groups into a signal serving as an uplink signal to be transmitted to one of said base stations for further processing of the uplink signal;wherein said control module is configured to establish a transmission link between at least one of said base stations and at least one of said antenna devices of said antenna groups.2. The adaptive ...

ELECTRO-MECHANIC-PHOTONIC DELAY LINE FOR ANALOG SIGNAL PROCESSING

A photonic modulator is provided that includes a transducer element that receives a RF input signal and converts the RF input signal into an elastic wave. One or more optical waveguides receive the elastic wave that has propagated a specified distance through an acoustic delay line. The one or more optical waveguides perform optomechanical transduction on the elastic wave in the presence of an optical wave, which produces one or more scattered optical waves. An optical circuit sums the one or more scattered waves to produce an optical signal output. 1. A photonic modulator comprising:a transducer element that receives a RF input signal and converts the RF input signal into an elastic wave;one or more optical waveguides that receive the elastic wave that has propagated a specified distance through an acoustic delay line, the one or more optical waveguides perform optomechanical transduction on the elastic wave in the presence of an optical wave, which produces one or more scattered optical waves; andan optical circuit that sums the one or more scattered waves to produce an optical signal output.2. The photonic modulator of claim 1 , further comprising an optical receiver that downconverts the optical output signal into a RF output signal upon interacting with an optical reference wave resulting in RF-to-RF impulse responses having one or more delays associated with the transit time of the elastic wave through the acoustic delay line and the one or more optical waveguides.3. The photonic modulator of claim 2 , wherein the RF-to-RF impulse responses define a finite impulse response (FIR).4. The photonic modulator of claim 2 , wherein the one or more optical waveguides comprises a plurality of optical waveguides.5. The photonic modulator of claim 4 , further comprising a photonic distribution circuit that distributes optical power to the one or more optical waveguides through a laser.6. The photonic modulator of claim 5 , further comprising a photonic collection circuit ...

HIGH-BANDWIDTH UNDERWATER DATA COMMUNICATION SYSTEM

An apparatus is described which uses directly modulated InGaN Light-Emitting Diodes (LEDs) or InGaN lasers as the transmitters for an underwater data-communication device. The receiver uses automatic gain control to facilitate performance of the apparatus over a wide-range of distances and water turbidities. 121.-. (canceled)22. A system to perform seismic exploration in an aqueous medium , comprising:an ocean bottom seismometer (OBS) unit placed on a seabed to receive seismic data;a data conversion module of the OBS unit to convert the seismic data into an optical signal with a first format configured for optical transmission via the aqueous medium; establish, between the OBS unit and the underwater vehicle separated from the OBS unit by the aqueous medium, an optical link through the aqueous medium; and', 'determine a condition of the aqueous medium from a measurement of a characteristic of the optical link;, 'at least one of the OBS unit placed on the seabed and an underwater vehicle toa controller of the OBS unit to adjust a parameter associated with the optical signal based on the characteristic of the aqueous medium;an optical transmitter of the OBS unit placed on the seabed to transmit, via the optical link, the optical signal to an optical receiver of the underwater vehicle, the optical signal comprising the first format and the seismic data, the optical signal adjusted by the OBS unit based on the characteristic of the aqueous medium; and receive the optical signal transmitted by the optical transmitter of the OBS unit placed on the seabed via the optical link through the aqueous medium;', 'convert, responsive to receipt of the optical signal, the optical signal into a non-optical signal comprising a second format; and', 'provide the non-optical signal in the second format to a retrieval device., 'the underwater vehicle to23. The system of claim 22 , comprising:the OBS unit comprising a geophone to receive the seismic data.24. The system of claim 22 , ...

REDUCING LEAKED DOWNLINK INTERFERENCE SIGNALS IN A REMOTE UNIT UPLINK PATH(S) IN A DISTRIBUTED ANTENNA SYSTEM (DAS)

Methods and systems for reducing leaked downlink interference signals in a remote unit uplink path(s) in a distributed antenna system (DAS) are provided. In a remote antenna unit (RAU) disclosed herein, a downlink interference signal may be leaked from a downlink path to an uplink path in the RAU. In this regard, an adjustment circuit is provided in the downlink path of the RAU to suppress the downlink interference signal. A control system is provided in the DAS to monitor the leaked downlink interference signal and control the adjustment circuit in the RAU to minimize the leaked downlink interference signal in the uplink path. By providing the adjustment circuit in the RAU and the control system in the DAS to minimize the leaked downlink interference signal in the uplink path, it is possible to reduce interferences between downlink and uplink communications signals without increasing costs of the RAU. 1. A distributed antenna system (DAS) , comprising:a head-end equipment (HEE) communicatively coupled to a plurality of remote antenna units (RAUs) over at least one downlink communications medium and at least one uplink communications medium; receive the downlink signal from the downlink path and provide the downlink signal to an antenna, wherein the downlink signal comprises at least one downlink communications signal and at least one downlink interference signal; and', 'provide the uplink signal to the uplink path, wherein the uplink signal comprises an uplink communications signal received from the antenna and the at least one downlink interference signal leaked from the downlink path to the uplink path; and, 'wherein at least one RAU among the plurality of RAUs comprises a coupling device coupled to a downlink path configured to carry a downlink signal and an uplink path configured to carry an uplink signal, the coupling device configured to provide the at least one downlink communications signal to the at least one RAU over the at least one downlink ...

ELECTRONIC DEVICE FOR CONVERTING A WIRELESS SIGNAL INTO AT LEAST ONE MODULATED OPTICAL SIGNAL

Disclosed is an electronic device () for converting a wireless signal () in the mm-wave or sub-THz range into at least one modulated optical signal (). The electronic device () comprises an antenna element () for converting the wireless signal () into a guided electrical signal (), wherein the antenna element () is arranged on a printed circuit board (′) or on a first integrated chip (′)′ The electronic device () comprises an electrical signal converter () for converting the at least one guided electrical signal () into a conditioned electrical signal (), wherein the electrical signal converter () is arranged on a second integrated chip (″). The electronic device () comprises a modulator () for converting the conditioned electrical signal () into the modulated optical signal (), wherein the modulator () is arranged on a third integrated chip (′″), and wherein the modulator () comprises a waveguide () and a cladding () comprising a first cladding portion () having a conductive material at an interface with the waveguide () and a second cladding portion () having a conductive material at an interface with the waveguide (). 112161. An electronic device () for converting a wireless signal () in the mm-wave or sub-THz range into at least one modulated optical signal () , the electronic device () comprising:{'b': 11', '2', '2', '12', '11', '10', '10, 'i': 'b', 'at least one antenna element () for receiving the wireless signal () and for converting the wireless signal () into at least one guided electrical signal (), wherein the at least one antenna element () is arranged on a printed circuit board (′) or on a first integrated chip (′);'}{'b': 13', '12', '12', '14', '13', '10, 'an electrical signal converter () for receiving the at least one guided electrical signal () and for converting the at least one guided electrical signal () into at least one conditioned electrical signal (), wherein the electrical signal converter () is arranged on a second integrated chip (″); and ...

HYBRID DATA TRANSPORT FOR A VIRTUALIZED DISTRIBUTED ANTENNA SYSTEM

A system for data transport in a Distributed Antenna System (DAS) includes a plurality of remote Digital Access Units (DAUs) located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport digital signals between the plurality of remote DAUs. The system also includes a plurality of central hubs. Each of the plurality of central hubs is in communication with one of the remote DAUs using an electrical communications path. The system further includes a plurality of transmit/receive cells. Each of the plurality of transmit/receive cells includes a plurality of remote hubs. Each of the remote hubs in one of the plurality of transmit/receive cells is in communication with one of the plurality of central hubs using an optical communications path. 1. (canceled)2. A system for the transport of signals , the system comprising:one or more Digital Access Units (DAUs) located at a first location, wherein each DAU at the first location comprises at least one first input optical connection port and at least one first output optical connection port;a first mux/demux located at the first location and coupled to the DAUs located at the first location;a second mux/demux located at the second location and coupled to the first mux/demux located at the first location; andone or more DAUs located at a second location and coupled to the second mux/demux located at the second location, wherein each DAU at the second location comprises at least one second input optical connection port and at least one second output optical connection port;wherein the DAUs at the first location are configurable to receive a set of input signals from at least one base transceiver station (BTS) via the at least one first input optical connection port.3. The system of claim 2 , wherein the DAUs at the first location are further configurable to send a set of digitized signals that are representative of the set of input signals to the DAUs at the second location via ...

Passive optical network device

A passive optical network device comprising a casing, printed circuit board, and fiber optic transceiver system is provided. The fiber optic transceiver system comprises a fiber optic components device, fiber optic transceiver, and RF connector. During operation, the fiber optic components device converts optical signals from the fiber optic transceiver to digital signals, and then transmits the converted digital signals to external electronic systems via the hot-pluggable transceiver connection interface. The fiber optic components device converts digital signals from the external electronic systems to optical signals, and then transmits the optical signals to other external electronic systems via the fiber optic transceiver. The RF connector transmits RF signals from additional external electronic systems to the external electronic systems via the hot-pluggable transceiver connection interface. The RF connector transmits digital signals from the external electronic systems to the additional external electronic systems via the hot-pluggable transceiver connection interface.

OPTICAL TRANSCEIVER MODULES, OPTICAL TRANSMISSION DEVICES, AND OPTICAL TRANSMISSION METHODS

An optical transceiver module coupled to a device is provided. The optical transceiver module includes an electronic signal transmitting terminal coupled to a receiving terminal of the device, an electronic signal receiving terminal coupled to a transmitting terminal of the device, an optical signal receiving terminal coupled to the electronic signal transmitting terminal, and an optical signal transmitting terminal coupled to the electronic signal receiving terminal. When the optical transceiver module is at an normal operation state and the electronic signal receiving terminal does not receive any electronic signal over a first predetermined time period, the optical transceiver module enters a idle detection state to make the electronic signal transmitting terminal to perform a receiver termination detection to the device to determine whether the device is coupled to the optical transceiver module. At the idle detection state, the optical signal transmitting terminal transmits the optical signal continuously. 1. An optical transceiver module coupled to a device comprising:an electronic signal transmitting terminal coupled to a receiving terminal of the device;an electronic signal receiving terminal coupled to a transmitting terminal of the device;an optical signal receiving terminal coupled to the electronic signal transmitting terminal; andan optical signal transmitting terminal coupled to the electronic signal receiving terminal,wherein when the optical transceiver module is at a normal operation state, the optical signal transmitting terminal transmits an optical signal,wherein when the optical transceiver module is at the normal operation state and the electronic signal receiving terminal does not receive any electronic signal over a first predetermined time period, the optical transceiver module enters a idle detection state, such that the electronic signal transmitting terminal performs a receiver termination detection to the device to determine whether the ...

ANALOG OPTICAL FIBER-BASED SIGNAL DISTRIBUTION SYSTEM AND METHOD

In an analog, fiber-based signal distribution system, a periodic electrical signal is frequency-multiplied by a factor of N, is converted to an optical signal, is optically amplified, is split among one or more optical fibers, is delivered by fiber to one or more remote units, is converted back to an electrical signal, is frequency-divided by the factor of N back to its original frequency, and can be used to generate synchronized clock signals at the remote units. The optical amplifier imparts a phase noise that is relatively independent of frequency, so that the phase noise contribution from the optical amplifier is advantageously decreased when the frequency divider reduces the frequency of the electrical signal. Compared to a distribution system that does not increase, then decrease, the frequency by a factor of N, the phase noise contribution from the optical amplifier is reduced by 20 log 10(N). 1. An analog , fiber-based signal distribution system , comprising:a frequency multiplier configured to receive a first periodic electrical signal at a base frequency and convert the first periodic electrical signal to a second periodic electrical signal at an elevated frequency greater than the base frequency;an optical source configured to convert the second periodic electrical signal to a third periodic optical signal at the elevated frequency;an optical amplifier configured to amplify the third periodic optical signal to produce a fourth periodic optical signal at the elevated frequency; andan optical fiber configured to receive the fourth periodic optical signal and direct a respective sixth periodic optical signal to a remote unit, an optical detector configured to receive the sixth periodic optical signal at the elevated frequency and produce a seventh periodic electrical signal at the elevated frequency; and', 'a frequency divider configured to receive the seventh periodic electrical signal at the elevated frequency and produce an eighth periodic electrical ...

POWER MANAGEMENT FOR REMOTE ANTENNA UNITS IN DISTRIBUTED ANTENNA SYSTEMS

Power management for remote units in a wireless distribution system. Power can be managed for a remote unit configured to power modules and devices that may require more power to operate than power available to the remote unit. For example, the remote unit may be configured to include power-consuming remote unit modules to provide communication services. As another example, the remote unit may be configured to provide power through powered ports in the remote unit to power-consuming devices. Depending on the configuration of the remote unit, the power-consuming remote unit modules and/or power-consuming devices may demand more power than is available at the remote unit. In this instance, the power available at the remote unit can be distributed to the power-consuming modules and devices based on the priority of services desired to be provided by the remote unit. 1. A wireless communication system having a coverage area , comprising: at least one electrical-to-optical (E/O) converter configured to convert electrical uplink communications to optical uplink communications;', 'at least one optical-to-electrical (O/E) converter configured to convert optical downlink communications to electrical downlink communications; and', a first communications port connected to and configured to provide power to a first external power-consuming device; and', 'a second communications port;, 'wherein at least one of the plurality of remote units comprises, 'at least one antenna configured to transmit radio frequency (RF) communications services to the coverage area;'}], 'a plurality of remote units distributed over a plurality of floors of a building infrastructure, each of the plurality of remote units comprisinga head end comprising a remote controller communicatively coupled to the plurality of remote units, wherein the remote controller is configured to provide a prioritization of services of the plurality of remote units;at least one riser cable comprising a plurality of optical ...

OPTICAL MODULE

An embodiment of the invention relates to an optical module comprising at least one optoelectronic component capable of generating or receiving radiation; at least one access port for receiving or emitting the radiation; at least one free-space beam path located between the access port and the optoelectronic component; at least one mirror located in said beam path; at least one attenuation unit located in said beam path; the attenuation unit having a reflecting surface section and an absorbing surface section; and, a control unit for adjusting the amount of radiation which is directed towards the absorbing surface section of the attenuation unit by controlling at least one or all of the following: the position of the mirror, the orientation of the mirror, the position of the attenuation unit and/or the orientation of the attenuation unit. 1. An optical module comprising:at least one optoelectronic component capable of generating or receiving radiation;at least one access port configured to receive or emit the radiation;at least one free-space beam path located between the access port and the optoelectronic component;at least one mirror located in said beam path;at least one attenuation unit located in said beam path, the attenuation unit having a reflecting surface section and an absorbing surface section; anda control unit configured to adjust the amount of radiation which is directed towards the absorbing surface section of the attenuation unit by controlling at least one of the following: the position of the mirror, the orientation of the mirror, the position of the attenuation unit and the orientation of the attenuation unit.2. The optical module according to claim 1 , wherein at least a portion of the absorbing surface section is formed by a photodetector.3. The optical module of claim 1 , wherein the reflecting surface section is located adjacent to or surrounded by the absorbing surface section.4. The optical module of claim 2 , wherein the reflecting surface ...

STRUCTURED SUBSTRATE FOR OPTICAL FIBER ALIGNMENT

A structured substrate for optical fiber alignment is produced at least in part by forming a substrate with a plurality of buried conductive features and a plurality of top level conductive features. At least one of the plurality of top level conductive features defines a bond pad. A groove is then patterned in the substrate utilizing a portion of the plurality of top level conductive features as an etch mask and one of the plurality of buried conductive features as an etch stop. At least a portion of an optical fiber is placed into the groove. 1. A method comprising the steps of:forming a substrate comprising a plurality of buried conductive features and a plurality of top level conductive features, at least one of the plurality of top level conductive features defining a bond pad;patterning a groove in the substrate utilizing a portion of the plurality of top level conductive features as an etch mask and one of the plurality of buried conductive features as an etch stop; andplacing at least a portion of an optical fiber into the groove.2. The method of claim 1 , wherein the substrate comprises a surface laminar circuit.3. The method of claim 1 , wherein the plurality of top level conductive features comprise a metal claim 1 , and the plurality of buried conductive features comprise a metal.4. The method of claim 1 , wherein the step of patterning the groove comprises laser ablation.5. The method of claim 1 , wherein the optical fiber is supported by a fiber holder.6. The method of claim 5 , further comprising the steps of:patterning a trench in the substrate; andplacing at least a portion of the fiber holder into the trench.7. The method of wherein the step of patterning the trench comprises utilizing a portion of the plurality of top level conductive features as an etch mask and one of the plurality of buried conductive features as an etch stop.8. The method of claim 1 , further comprising the step of forming a mirror at an end of the optical fiber.9. The method ...

POWER DISTRIBUTION MODULE(S) CAPABLE OF HOT CONNECTION AND/OR DISCONNECTION FOR WIRELESS COMMUNICATION SYSTEMS, AND RELATED POWER UNITS, COMPONENTS, AND METHODS

Power distribution modules are configured to distribute power to a power-consuming component(s), such as a remote antenna unit(s) (RAU(s)). By “hot” connection and/or disconnection, the power distribution modules can be connected and/or disconnected from a power unit and/or a power-consuming component(s) while power is being provided to the power distribution modules. Power is not required to be disabled in the power unit before connection and/or disconnection of power distribution modules. The power distribution modules may be configured to protect against or reduce electrical arcing or electrical contact erosion that may otherwise result from “hot” connection and/or connection of the power distribution modules. 1. A wireless communication system , comprising: at least one first downlink input configured to receive downlink electrical radio frequency (RF) communications signals; and', 'at least one uplink output configured to receive and communicate uplink electrical RF communications signals;, 'a central unit comprising wherein the one or more O/E converters in one or more of the plurality of RAUs are configured to convert downlink optical RF communications signals received from one or more of the plurality of optical fibers to electrical RF communications signals to be provided to one or more client devices in the one or more coverage areas of the plurality of RAUs; and', 'wherein the one or more E/O converters in one or more of the plurality of RAUs are configured to convert electrical RF communications signals received from the one or more client devices to optical RF communications signals to be provided over one or more of the plurality of optical fibers to the central unit; and, 'a plurality of remote antenna units (RAUs) communicatively coupled to the central unit by an optical fiber link comprising a plurality of optical fibers, each of the plurality of RAUs configured to provide communications to a corresponding coverage area of one or more coverage areas ...

MULTICHANNEL SOFTWARE DEFINED RADIO RECEIVER WITH OPTICALLY ISOLATED ADC

A high speed split receiver interface system for sensing a series of external signals, the system including: a series of remote radio head units for receiving a sensed signal in an analog electric form, each of the remote radio head units converting their sensed signal to a corresponding digital electrical form and then to a corresponding optical data form for dispatch over an optical data interconnection; at least one optical interconnect interconnecting each remote radio head unit with a baseband unit; a first baseband unit interconnecting the series of remote head units corresponding optical interconnects, and including a converter for conversion of the received optical signals to corresponding electrical digital form and down sampling the optical signals to corresponding down sampled signals, a memory store for storing the down sampled signals, and an external network interface for transmission of the saved signals to an external device. 1. A high speed split receiver interface system for sensing a series of external signals , the system including:a series of remote radio head units configured for receiving a sensed signal in an analog electric form, each of the remote radio head units being configured to convert its sensed signal into a corresponding digital electrical form and then into a corresponding optical data form suitable for dispatch over an optical data interconnection;at least one optical interconnect interconnecting each of the remote radio head units with a baseband unit; a converter configured to convert the received optical signals into corresponding electrical digital form and to down sample the optical signals to corresponding down sampled signals;', 'a memory store configured for storing the down sampled signals; and', 'an external network interface configured for transmission of the saved signals to an external device., 'a first baseband unit interconnecting the series of remote radio head units using corresponding optical interconnects, and ...

ADAPTIVE OPTICAL CHANNEL COMPENSATION

In an adaptation module relating generally to adaptive optical channel compensation, an analysis module is coupled to receive a first data signal and a second data signal and coupled to provide first information and second information. A comparison module is coupled to compare the first information and the second information to provide third information. An adjustment module is coupled to receive the third information to provide fourth information to compensate for distortion in the second data signal with reference to the first data signal. The second data signal is associated with a conversion of the first data signal to an optical signal for communication via an optical channel. 1. An adaptation module for adaptive optical channel compensation , comprising:an analysis module coupled to receive a first data signal and a second data signal and coupled to provide first information and second information;a comparison module coupled to compare the first information and the second information to provide third information; andan adjustment module coupled to receive the third information to provide fourth information to compensate for distortion in the second data signal with reference to the first data signal;wherein the second data signal is associated with a conversion of the first data signal to an optical signal for communication via an optical channel.2. The adaptation module according to claim 1 , wherein the analysis module is a spectrum analysis module coupled to generate the first information for the first data signal and the second information for the second data signal.3. The adaptation module according to claim 2 , wherein:the spectrum analysis module includes a spectrum analyzer;the second data signal is feedback associated with the first data signal; andthe first information and the second information respectively are first spectral information and second spectral information output from the spectrum analyzer.4. The adaptation module according to claim 3 , ...

CHROMATIC DISPERSION COMPENSATOR WITH INTEGRATED ANTI-ALIASING FILTER AND RESAMPLER

A chromatic dispersion compensator to receive a first set of digital signal values produced by sampling an analog signal at a first sampling rate and generate a second set of digital signal values by sampling the first set of digital signal values at a second sampling rate. The chromatic dispersion compensator applies a chromatic dispersion filter and an anti-aliasing filter to the first set of digital signal values. 1. An apparatus , comprising:a chromatic dispersion compensator to receive a first set of digital signal values produced by sampling an analog signal at a first sampling rate and generate a second set of digital signal values by sampling the first set of digital signal values at a second sampling rate that is different than the first sampling rate, wherein the chromatic dispersion compensator applies a chromatic dispersion filter and an anti-aliasing filter to the first set of digital signal values.2. The apparatus of claim 1 , further comprising:an analog-to-digital converter to generate the first set of digital signal values by sampling the analog signal at the first sampling rate.3. The apparatus of claim 1 , wherein the first sampling rate is two samples per symbol and the second sampling rate is 1.P samples per symbol.4. The apparatus of claim 1 , wherein a ratio of the first sampling rate to the second sampling rate is N/M claim 1 , and wherein N and M are integers equal to 1 or greater.5. The apparatus of claim 1 , wherein the chromatic dispersion compensator comprises an overlap extender to combine the first set of digital signal values with a plurality of previous digital signal values sampled at the first sampling rate to form a first extended set of digital signal values claim 1 , and wherein the chromatic dispersion compensator comprises a discrete Fourier transform to transform the first extended set of digital signal values to a first plurality of frequency components.6. The apparatus of claim 5 , wherein the chromatic dispersion filter is ...

FINGERPRINT AUTHERNTICATED TOUCHSCEEEN CONTOLLED CASCADED 3G-OFDM MOBILE SYSTEMS

Receiving and demodulating in a mobile device Orthogonal Frequency Division Multiplexed (OFDM) modulated signal into OFDM baseband signal for converting OFDM baseband signal into spread spectrum baseband signal for modulating and transmitting the spectrum signal. The spread spectrum baseband signal contains cross-correlated in-phase and quadrature phase baseband signals. Receiving and demodulating a video spread spectrum modulated signal for providing video spread spectrum baseband signal for viewing baseband video signal. Transmitting and receiving OFDM video and voice signals in Video Internet Protocol (ViIP) and in Voice Over Internet Protocol (VoIP) Wi-Fi networks. Processing a touch screen generated signal into a processed touch screen control signal for use by said user, to launch browser from the screen of said mobile device and using a fingerprint generated signal for providing from fingerprint signal a fingerprint authentication signal. Processing a received demodulated location finding modulated signal with a photo camera generated signal and modulating and transmitting the demodulated location finding modulated signal with the camera generated signal. 1. A method comprising steps of:receiving and demodulating in a mobile device a first Orthogonal Frequency Division Multiplexed (OFDM) modulated signal into a first OFDM baseband signal for converting said first OFDM baseband signal into a first spread spectrum baseband signal;modulating said first spread spectrum baseband signal in a first modulator into a first spread spectrum modulated signal and transmitting in said mobile device said first spread spectrum modulated signal;receiving and demodulating a first video second spread spectrum modulated signal into a first video second spread spectrum baseband signal, for providing said video second spread spectrum baseband signal to an interface unit of said mobile device for viewing said baseband video signal, said first spread spectrum baseband signal is a ...

TRANSMISSION PERFORMANCE MONITORING METHOD FOR MONITORING TRANSMISSION PERFORMANCE BASED ON ANALOG OPTICAL LINK, AND MONITORING APPARATUS PERFORMING THE METHOD

A transmission performance monitoring method for monitoring a transmission performance based on an analog optical link and an apparatus performing the method. The transmission performance monitoring method and apparatus centrally monitor an RF signal transmission performance in an analog optical link-based mobile haul or indoor distributed antenna system. 1. A transmission performance monitoring method comprising:receiving an analog radio frequency (RF) signal based on an analog optical link;filtering the analog RF signal;converting the filtered analog RF signal into a digital RF signal;under-sampling the converted digital RF signal;determining a carrier to noise ratio (CNR) of an analog RF signal corresponding to the under-sampled digital RF signal; andmonitoring a transmission performance of the analog optical link using the analog RF signal of which the CNR is determined.2. The transmission performance monitoring method of claim 1 , wherein the receiving of the analog RF signal comprises receiving an analog RF signal having a frequency of a band higher than that of a baseband signal.3. The transmission performance monitoring method of claim 1 , wherein the filtering of the analog RF signal comprises filtering an analog RF signal based on a frequency range of a tone signal or a desired signal to be monitored.4. The transmission performance monitoring method of claim 1 , wherein the under-sampling comprises:setting a sampling frequency used for down-conversion to a digital RF signal having a lower frequency compared to that of the converted digital RF signal; andunder-sampling a digital RF signal converted using the sampling frequency.5. The transmission performance monitoring method of claim 4 , wherein the setting of the sampling frequency comprises setting a sampling frequency based on a high-frequency of the converted digital RF signal and a low-frequency of the converted digital RF signal.6. The transmission performance monitoring method of claim 5 , wherein a ...

POWER MANAGEMENT FOR REMOTE ANTENNA UNITS IN DISTRIBUTED ANTENNA SYSTEMS

Power management for remote units in a wireless distribution system. Power can be managed for a remote unit configured to power modules and devices that may require more power to operate than power available to the remote unit. For example, the remote unit may be configured to include power-consuming remote unit modules to provide communication services. As another example, the remote unit may be configured to provide power through powered ports in the remote unit to power-consuming devices. Depending on the configuration of the remote unit, the power-consuming remote unit modules and/or power-consuming devices may demand more power than is available at the remote unit. In this instance, the power available at the remote unit can be distributed to the power-consuming modules and devices based on the priority of services desired to be provided by the remote unit. 1. A method of operating a wireless communications system having a coverage area , comprising:receiving downlink optical digital data signals at a remote unit, the remote unit comprising at least one antenna;receiving downlink optical cellular signals at the remote unit;converting the downlink optical digital data signals to downlink electrical digital data signals in the remote unit;providing the downlink electrical digital data signals to a first communications port;providing the downlink optical cellular signals to a second communications port;receiving the downlink electrical digital data signals at an external access point, the external access point being connected to and powered through the second communications port;providing wireless digital data services in the coverage area from the external access point; andproviding the downlink optical cellular signals to an external cellular device in optical communication with the second communications port.2. The method of claim 1 , further comprising providing wireless cellular services in the coverage area from the external cellular device.3. The method of ...

OPTICAL FIBER-BASED DISTRIBUTED RADIO FREQUENCY (RF) ANTENNA SYSTEMS SUPPORTING MULTIPLE-INPUT, MULTIPLE-OUTPUT (MIMO) CONFIGURATIONS, AND RELATED COMPONENTS AND METHODS

Optical fiber-based distributed antenna systems that support multiple-input, multiple-output (MIMO) antenna configurations and communications. Embodiments disclosed herein include optical fiber-based distributed antenna system that can be flexibly configured to support or not support MIMO communications configurations. In one embodiment, first and second MIMO communication paths are shared on the same optical fiber using frequency conversion to avoid interference issues, wherein the second communication path is provide to a remote extension unit to remote antenna unit. In another embodiment, the optical fiber-based distributed antenna systems may be configured to allow to provide MIMO communication configurations with existing components. Existing capacity of system components are employed to create second communication paths for MIMO configurations, thereby reducing overall capacity, but allowing avoidance of frequency conversion components and remote extension units. 1. An apparatus configured to distribute radio-frequency (RF) communications signals in a distributed antenna system in a multiple-input , multiple-output (MIMO) configuration , comprising:at least one first radio interface configured to distribute received first downlink electrical RF communications signals in a first radio band frequency into first downlink electrical RF communications signals;at least one second radio interface configured to distribute received second downlink electrical RF communications signals in the first radio band frequency into second downlink electrical RF communications signals; receive the first downlink electrical RF communications signals from the at least one first radio interface;', 'convert the received first downlink electrical RF communications signals from the at least one first radio interface into first downlink optical RF communications signals;', 'distribute the first downlink optical RF communications signals over optical fiber in a first downlink ...

METHOD AND APPARATUS FOR EQUALIZING SIGNALS

A system and apparatus are disclosed for a method and apparatus for equalizing signals. An apparatus that incorporates teachings of the present disclosure may include, for example, an equalizer having a channel estimation calculator for calculating a time domain channel estimation from a baseband signal, a Fast Fourier Transform processor for translating the time domain channel estimation to a frequency domain channel estimation, a tap weight calculator for calculating a frequency domain tap weight according to the frequency domain channel estimation, an inverse Fast Fourier Transform processor for translating the frequency domain tap weight calculation to a time domain tap weight calculation, and a filter for equalizing the baseband signal according to the time domain tap weight calculation. 1. A communications device , comprising:a transceiver operating in a wideband code division multiple access high speed downlink packet access communication system;a memory that stores computer instructions; and converting a carrier signal to a baseband signal;', 'calculating a time domain channel estimation from the baseband signal;', 'translating the time domain channel estimation to produce a frequency domain channel estimation;', 'performing a frequency domain tap weight calculation according to the frequency domain channel estimation;', 'translating the frequency domain channel estimation to a time domain tap weight calculation;', 'equalizing the baseband signal according to the time domain tap weight calculation to provide an equalized signal; and', 'restoring signal integrity to the baseband signal based on the equalized signal as a restored baseband signal., 'a controller coupled to the memory and the transceiver, wherein the controller, responsive to executing the computer instructions, performs operations comprising2. The communications device of claim 1 , further comprising an audio system.3. The communications device of claim 2 , wherein the audio system is ...

Parallel optical system with integrated monitoring photodetectors

The invention provides an optical system, in particular, a multi-channel parallel optical transceiver system with monitoring photodetectors and methods of forming the same. The multi-channel parallel optical system includes a substrate with at least one optical component mounted on the first side, at least one optical monitoring photodetector (mPD) fabricated on the first side of the substrate, a set of optical functional components disposed on the first side of the substrate to guide and reflect the light signal, an arrayed fiber placement structure fixing at least one optical fiber and having an exposed end to couple with the optical functional components to guide and diffract light from and to the optical components mounted on the first side of the substrate. The optical alignment of the optical placement structure, optical functional components, and the optical components mounted on the substrate is realized passively through the alignment holes and pins.

Optical transmission system, optical receiving apparatus and optical transmission method

There are provided an optical transmission apparatus that subjects a transmission signal including a plurality of sequences to Hadamard transform to obtain a signal in which a predetermined delay is added to one of the sequences, optically modulates the obtained signal, and transmits the modulated signal, and an optical reception apparatus that demodulates a reception signal received from the optical transmission apparatus by subjecting the reception signal to adaptive equalization processing with a predetermined number of taps. The optical reception apparatus includes: an adaptive equalization processing unit that subjects the reception signal to adaptive equalization processing of wavelength distortion compensation with a number of taps obtained by subtracting a number in accordance with the delay from the predetermined number of taps; a delay compensation unit that subjects the reception signal subjected to the wavelength distortion compensation to delay compensation in accordance with the delay; and an inverse Hadamard transform unit that subjects the reception signal subjected to the delay compensation to inverse Hadamard transform.

POWER MANAGEMENT FOR REMOTE ANTENNA UNITS IN DISTRIBUTED ANTENNA SYSTEMS

Power management for remote units in a wireless distribution system. Power can be managed for a remote unit configured to power modules and devices that may require more power to operate than power available to the remote unit. For example, the remote unit may be configured to include power-consuming remote unit modules to provide communication services. As another example, the remote unit may be configured to provide power through powered ports in the remote unit to power-consuming devices. Depending on the configuration of the remote unit, the power-consuming remote unit modules and/or power-consuming devices may demand more power than is available at the remote unit. In this instance, the power available at the remote unit can be distributed to the power-consuming modules and devices based on the priority of services desired to be provided by the remote unit.

DISTRIBUTED ANTENNA SYSTEM ARCHITECTURES

Optical fiber-based wireless systems and related components and methods are disclosed. The systems support radio frequency (RF) communications with clients over optical fiber, including Radio-over-Fiber (RoF) communications. The systems may be provided as part of an indoor distributed antenna system (IDAS) to provide wireless communication services to clients inside a building or other facility. The systems incorporate various functions, such as optical network terminal (ONT), splitter, and local powering, in antenna coverage areas. 1. A wireless communication system , comprising:a head end unit configured to electronically receive and convert input downlink radio frequency (RF) signals received from at least one source to optical downlink RF signals to be distributed on an optical communication path comprising a plurality of optical fiber cables and at least one splitter component;an optical line terminal (OLT) configured to receive and distribute optical multiplexed data signals on the optical communication path;at least one optical network terminal (ONT) component located proximate to at least one remote unit and configured to demultiplex the optical multiplexed data signals into component parts; an optical-to-electrical converter configured to convert the received optical downlink RF signals to output electrical downlink RF signals; and', 'an antenna system configured to distribute the output electrical downlink RF signals into a respective coverage area of the remote unit; and, 'a plurality of remote units each coupled to the head end unit and the OLT by the optical communication path to receive the optical downlink RF signals and the optical multiplexed data signals from the head end unit and the OLT, each remote unit of the plurality of remote units configured to receive power delivered from an electrical power source located in a respective coverage area of one or more of the plurality of the remote units, wherein each remote unit comprisesan electrically ...

Supporting remote unit uplink tests in a distributed antenna system (das)

Methods and systems for supporting remote unit uplink tests in a distributed antenna system (DAS) are disclosed. In this regard, in one aspect, a centralized test signal generator is provided in the DAS to generate uplink test signals for one or more remote antenna units (RAUs) under test (RUTs). By providing the uplink test signals to the one or more RUTs from the centralized test signal generator, it is possible to perform uplink tests more efficiently with reduced equipment cost. The uplink test signals are distributed to the one or more RUTs over a downlink communications medium of the DAS. In another aspect, the one or more RUTs return the uplink test signals to a signal monitor over an uplink communications medium of the DAS, whereby uplink performance of the one or more RUTs can be examined to help optimize the DAS to improve quality of service (QoS).

INTEGRATED MULTICHANNEL PHOTONIC RECEIVER

An integrated multi-channel photonic radio-frequency (RF) receiver system includes a master oscillator including a laser source configured to generate laser light. A local oscillator (LO) path may include an LO generator, an LO modulator, an optical LO filter, and an optical amplifier optically coupled to one another to generate an LO signal. Multiple RF-modulation channels are coupled through an optical switch to a number of channel filters and configured to produce a number of filtered RF-modulated optical signals. An optical combiner may combine the LO signal with each filtered RF-modulated optical signal to generate down-converted optical signals. Each channel of the plurality of RF-modulation channels includes a channel laser coupled to a channel modulator, and the LO generator and channel lasers of the RF-modulation channels are fed by the laser light of the master oscillator. 1. An integrated multi-channel photonic radio-frequency (RF) receiver system , the system comprising:a master oscillator comprising a laser source configured to generate laser light;a local oscillator (LO) path comprising an LO generator, an LO modulator, an optical LO filter, and an optical amplifier optically coupled and configured to generate an LO signal;a plurality of RF-modulation channels coupled through an optical switch to a plurality of channel filters and configured to produce a plurality of filtered RF-modulated optical signals; andan optical combiner configured to combine the LO signal with each filtered RF-modulated optical signal of the plurality of filtered RF-modulated optical signals to generate up- or down-converted optical signals,wherein:each channel of the plurality of RF-modulation channels includes a channel laser coupled to a channel modulator, andthe LO path and channel lasers of the plurality of RF-modulation channels are fed by and wavelength locked to an operating wavelength of the laser light of the master oscillator.2. The system of claim 1 , wherein the ...

OPTICALLY POWERED MEDIA CONVERTER

An optically powered media conversion device for performing optical to electrical conversion is disclosed. The conversion device includes at least one optical coupler for receiving at least one optical signal comprising at least one wavelength, wherein the at least one optical coupler extracts energy from the at least one optical signal, and at least one detector for extracting data from the at least one optical signal and converting the optical signal to an electrical signal using a photovoltaic process. The conversion device further includes a transmitter for converting an electrical signal to an optical signal and transmitting the optical signal to a first device. 117-. (canceled)18. An optically powered media converter comprising:an optical receiver including an optical signal input connection, an optical data output connection, and an optical power output connection;a photovoltaic detector optically connected to the optical data output connection of the optical receiver and including an electrical data output;a transmitter including an electrical signal connection and an optical data transmission output;a photovoltaic cell connected to the optical power output connection;a charge pump electrically connected to the photovoltaic cell; andan electrical energy storage device electrically connected to the charge pump.19. The optically powered media converter of claim 18 , wherein the transmitter is powered by the electrical energy storage device.20. The optically powered media converter of claim 18 , wherein the photovoltaic detector is powered by the electrical energy storage device.21. The optically powered media converter of claim 18 , further comprising a PIN detector optically connected between the optical receiver and the photovoltaic detector.22. The optically powered media converter of claim 18 , further comprising a microcontroller electrically connected to the PIN detector.23. The optically powered media converter of claim 18 , wherein the photovoltaic ...

Transmission device, optical termination device, transmission system, and transmission method

A transmission device includes an interface configured to acquire, from a base band unit having a communication destination that is one of remote radio heads, communication destination information relating to the remote radio head of the communication destination, a receiver configured to receive signals of given wavelength from optical termination devices, and a transmitter configured to transmit a first signal that includes wavelength information indicative of the given wavelength and the communication destination information to optical termination devices, wherein, when the receiver receives, from an optical termination device of the remote radio head of the communication destination from among optical termination devices, a second signal of the given wavelength according to the first signal, the receiver sets, between the receiver and the optical termination device, a relay path that relays communication between the base band unit and the remote radio head of the communication destination.

POWER MANAGEMENT FOR REMOTE ANTENNA UNITS IN DISTRIBUTED ANTENNA SYSTEMS

Power management for remote units in a wireless distribution system. Power can be managed for a remote unit configured to power modules and devices that may require more power to operate than power available to the remote unit. For example, the remote unit may be configured to include power-consuming remote unit modules to provide communication services. As another example, the remote unit may be configured to provide power through powered ports in the remote unit to power-consuming devices. Depending on the configuration of the remote unit, the power-consuming remote unit modules and/or power-consuming devices may demand more power than is available at the remote unit. In this instance, the power available at the remote unit can be distributed to the power-consuming modules and devices based on the priority of services desired to be provided by the remote unit. 1. A remote unit for providing wireless services in a wireless communication system having a coverage area , comprising:at least one antenna configured to transmit radio frequency (RF) communications services to the coverage area;a transport optical sub-assembly configured to convert downlink optical digital signals to downlink electrical digital signals;a receive optical sub-assembly configured to convert uplink electrical digital signals to uplink optical digital signals;a first communications port coupled to the transport optical sub-assembly and coupled to the receive optical sub-assembly;a first external device connected to and powered through the first communications port, wherein the first external device is configured to provide digital data services (DDS) in the coverage area; anda second communications port configured to provide downlink optical RF communications to a second external device over at least one optical fiber.2. The remote unit of claim 1 , wherein the remote unit is configured to enable power for one or more of the first communications port and the second communications port based on ...

Individual Information in Lower and Upper Optical Sidebands

This disclosure is directed to an optical transmitter arrangement and a method therein producing a first RF-signal UA comprising a first set of data Acarried by a subcarrier f, and a second RF-signal UB comprising a second set of data Bcarried by the subcarrier f. Further producing a first transform signal H(UA) being a Hilbert Transform of the first RF-signal UA and a second transform signal −H(UB) being a Hilbert Transform of the second RF-signal UB In addition, modulating the optical carrier fwith the first RF-signal UA and the first transform signal H(UA), and forming a first sideband SBcomprising the first set of data Aat one side of the frequency fof the optical carrier f. In addition, modulating the optical carrier fwith the second RF-signal UB and the second transform signal −H(UB), and forming a second sideband SBcomprising the second set of data Bat the other side of the frequency fof the optical carrier f. 1. A method for allocating individual data in lower and upper sidebands in an optical signal to be transmitted , comprising:producing a first RF signal comprising a first set of data carried by a subcarrier, and a second RF signal comprising a second set of data carried by the subcarrier;producing a first transform signal being a Hilbert Transform of the first RF signal, and a second transform signal being a Hilbert Transform of the second RF signal;modulating the optical carrier with the first RF signal and the first transform signal, and forming a first sideband comprising the first set of data at one side of the frequency of the optical carrier; andmodulating the optical carrier with the second RF signal and the second transform signal, and forming a second sideband comprising the second set of data at the other side of the frequency of the optical carrier.2. The method according to claim 1 ,wherein the first RF signal claim 1 , the second RF signal claim 1 , the first transform signal claim 1 , and the second transform signal are electrical signals. ...

OPTICAL BANDWIDTH INTERLEAVING

A method of processing an optical input signal comprises transmitting the optical input signal through first and second signal paths, mixing the optical input signal with first and second local oscillator (LO) signals in the respective first and second signal paths to produce first and second electrical signals corresponding to different portions of a frequency spectrum of the optical input signal, and combining the first and second electrical signals to produce a coherent time-domain output signal. 1. A method of processing an optical input signal , comprising:transmitting the optical input signal through first and second signal paths;mixing the optical input signal with first and second local oscillator (LO) signals in the respective first and second signal paths to produce first and second electrical signals corresponding to different portions of a frequency spectrum of the optical input signal; andcombining the first and second electrical signals to produce a coherent time-domain output signal.2. The method of claim 1 , further comprising:splitting the optical input signal into first and second polarization components;transmitting the first polarization component through the first and second signal paths;transmitting the second polarization component through third and fourth signal paths;mixing the second polarization component with the first and second LO signals in the respective third and fourth and second signal paths to produce third and fourth electrical signals corresponding to different portions of the frequency spectrum of the optical input signal;combining the first and second electrical signals to produce a coherent time-domain output signal for the first polarization and combining the third and fourth electrical signals to produce a coherent time-domain output signal for the second polarization.3. The method of claim 1 , further comprising generating the first and second LO signals by generating an LO precursor signal having a carrier frequency claim ...

BURST MODE OPTICAL RECEIVER AND MEMORY SYSTEM USING THE SAME

A burst mode optical receiver includes a pre-amplifier configured to convert an optical burst mode signal into a voltage signal, a reference controller configured to determine a reference voltage for the voltage signal in response to a mode signal from a host indicating an interval during which the voltage signal is DC balanced, and a main amplifier configured to restore the voltage signal to a data signal based on the reference voltage. Related methods of operation are also discussed. 1. A burst mode optical receiver , comprising:a pre-amplifier configured to convert a burst mode signal into a voltage signal;a reference controller configured to determine a data reference voltage of the voltage signal in response to a mode signal from a host, the mode signal indicating a training interval in which the burst mode signal is DC balanced; anda main amplifier configured to restore the voltage signal to a data signal based on the data reference voltage.2. The burst mode optical receiver of claim 1 , wherein in the training interval claim 1 , a number of ‘1’ bits included in the burst mode signal is equal to a number of ‘0’ bits included in the burst mode signal.3. The burst mode optical receiver of claim 2 , wherein in the training interval claim 2 , the burst mode signal is a signal having such a pattern that at least one of the ‘1’ bits and at least one of the ‘0’ bits or a sequence of the ‘1’ bits and a sequence of the ‘0’ bits are in turn received.4. The burst mode optical receiver of claim 1 , wherein the main amplifier is configured to restore the voltage signal to the data signal having a predetermined uniform amplitude based on the data reference voltage.5. The burst mode optical receiver of claim 1 , wherein the reference controller is configured to calculate an average of the voltage signal during the training interval of the burst mode signal in response to the mode signal and is configured to output the calculated average as the data reference voltage.6. The ...

SAFETY POWER DISCONNECTION FOR POWER DISTRIBUTION OVER POWER CONDUCTORS TO POWER CONSUMING DEVICES

Safety power disconnection for remote power distribution in power distribution systems is disclosed. The power distribution system includes one or more power distribution circuits each configured to remotely distribute power from a power source over current carrying power conductors to remote units to provide power for remote unit operations. A remote unit is configured to decouple power from the power conductors thereby disconnecting the load of the remote unit from the power distribution system. A current measurement circuit in the power distribution system measures current flowing on the power conductors and provides a current measurement to the controller circuit. The controller circuit is configured to disconnect the power source from the power conductors for safety reasons in response to detecting a current from the power source in excess of a threshold current level indicating a load. 1. A remote antenna unit , comprising:a remote power input coupled to a power conductor carrying current from a power distribution circuit; the remote switch circuit configured to be closed to couple to the remote power input; and', 'the remote switch circuit further configured to be opened to decouple from the remote power input;, 'a remote switch circuit comprising a remote switch input configured to receive a remote power connection signal;'}a switch control circuit coupled to the remote switch circuit and configured to periodically open the remote switch circuit to decouple from the remote power input; andat least one antenna, wherein distribute one or more downlink communications signals received from one or more downlink communications links, to one or more client devices; and', 'distribute one or more uplink communications signals from the one or more client devices to one or more uplink communications links., 'the remote antenna unit is configured to2. The remote antenna unit of claim 1 , wherein the antenna distributes the one or more downlink communications signals and ...

Cellular Fiber Monitoring Module

A cellular fiber monitoring module (CFMM) for a remote cellular tower site is implemented by providing monitoring for fiber connections between mobile carrier's broadcast ground equipment and its corresponding antenna equipment located on the cellular tower. Each monitoring module includes a fiber optic monitor pass though module which integrates the necessary monitoring data for each base transceiver station (BTS) equipment including, fiber port pass/fail status, peak to peak level measurement, optical degradation, BTS fault status, etc. The CFMM can be used as a stand-alone device or integrated into an on-site monitoring system. 1. A system comprised of a cellular fiber monitoring module (CFMM) connected between a mobile carrier's base transceiver station (BTS) equipment located at ground level within a cellular tower site and the corresponding remote radio head (RRH) located on the same tower. Said fiber monitoring module is configured to monitor the fiber for signal for faults as it passing through the device.2. The system as recited in claim 1 , wherein pass/fail status of the fiber data connection are monitored.3. The system as recited in claim 1 , wherein peak to peak levels with the fiber connection are monitored.4. The system as recited in claim 1 , wherein fiber degradation is monitored.5. The system as recited in claim 1 , wherein carrier's base transceiver station fault output is monitored. This Application is a continuation-in-part of, and claims priority under 35 U.S.C § 120 to co-pending U.S. patent application Ser. No. 14/157,775 filed Jan. 17, 2014, which is incorporated by reference for all purposes.The present invention relates to the method of monitoring fiber connections at a cellular tower site. More particularly, the connection between the carrier's base transceiver station (BTS) and the remote radio head (RRH).The fiber connection between a mobile carriers base transceiver station (BTS) and the remote radio head (RRH) are a vital part of ...

Devices and Methods for Multicarrier Modulation Schemes

A transmitter device, a receiver device and a transceiver device for a multicarrier modulation scheme. The transmitter device is configured to obtain a plurality of signature roots based on receiving a feedback message from a receiver device, construct a Lagrange matrix or a Vandermonde matrix from the plurality of signature roots, and generate a multicarrier modulated signal based on the Lagrange matrix or the Vandermonde matrix. The receiver device is configured to determine a plurality of signature roots, construct a Lagrange matrix or a Vandermonde matrix from the plurality of signature roots, and perform a demodulation of a multicarrier modulated signal based on the Lagrange matrix or the Vandermonde matrix. The transceiver device comprises a transmitter device configured to generate a multicarrier modulated signal, and a receiver device configured to perform a demodulation of the multicarrier modulated signal. 1. A transmitter device for a multicarrier modulation scheme , the transmitter device configured to:{'sub': ['k', 'k'], '#text': 'obtain a plurality of signature roots (ρ) based on a feedback message received from a receiver device, wherein each signature root of the plurality of signature roots (ρ) is a nonzero complex point;'}{'sub': 'k', '#text': 'construct, from the plurality of signature roots (ρ), at least one of a Lagrange matrix or a Vandermonde matrix; and'}generate a multicarrier modulated signal based on at least one of the Lagrange matrix or the Vandermonde matrix.2. The transmitter device according to claim 1 , wherein the feedback message indicates a radius (a) of a circle claim 1 , wherein signature roots of the plurality of signature roots (ρ) are uniformly distributed on a circumference of the circle.3. The transmitter device according to claim 2 , wherein the transmitter device is further configured to:{'sub': 'k', '#text': 'allocate a determined transmit power to each subcarrier of the multicarrier modulated signal according to a ...

DETERMINING PROPAGATION DELAY OF COMMUNICATIONS IN DISTRIBUTED ANTENNA SYSTEMS, AND RELATED COMPONENTS, SYSTEMS, AND METHODS

Components, systems, and methods for determining propagation delay of communications in distributed antenna systems are disclosed. The propagation delay of communications signals distributed in the distributed antenna systems is determined. If desired, the propagation delay(s) can be determined on a per remote antenna unit basis for the distributed antenna systems. The propagation delay(s) can provided by the distributed antenna systems to a network or other system to be taken into consideration for communications services or operations that are based on communications signal delay. As another non-limiting example, propagation delay can be determined and controlled for each remote antenna unit to uniquely distinguish the remote antenna units. In this manner, the location of a client device communicating with a remote antenna unit can be determined within the communication range of the remote antenna unit. 1. A communications system , comprising: at least one downlink radio frequency (RF) interface configured to receive downlink RF signals from a base station and distribute the downlink RF signals over at least one downlink communications medium to one or more remote antenna units (RAUs) to be communicated to one or more client devices;', 'at least one uplink RF interface configured to receive uplink RF signals over at least one uplink communications medium from the one or more RAUs communicated by the one or more client devices to the one or more RAUs; and', 'a propagation delay generator configured to add propagation delay to the at least one uplink communications medium;, 'a distributed antenna system, comprisingat least one propagation delay measurement circuit communicatively coupled to the at least one downlink RF interface and the at least one uplink RF interface, the at least one propagation delay measurement circuit configured to measure propagation delay of the received uplink RF signals from the one or more client devices by the at least one uplink RF ...

Unified optical fiber-based distributed antenna systems (dass) for supporting small cell communications deployment from multiple small cell service providers, and related devices and methods

Unified optical fiber-based distributed antenna systems (DASs) for supporting small cell communications deployment from multiple small cell service providers are disclosed. The unified optical fiber-based DASs disclosed herein are configured to receive multiple small cell communications from different small cell service providers to be deployed over optical fiber to small cells in the DAS. In this manner, the same DAS architecture can be employed to distribute different small cell communications from different small cell service providers to small cells. Use of optical fiber for delivering small cell communications can reduce the risk of having to deploy new cabling if bandwidth needs for future small cell communication services exceeds conductive wiring capabilities. Optical fiber cabling can also allow for higher distance cable runs to the small cells due to the lower loss of optical fiber, which can provide for enhanced centralization services.

SYSTEM AND METHOD USING CASCADED SINGLE PARTITY CHECK CODING

A system and method including a parity bit encoder for encoding each n−3 bits of data to be transmitted with three parity check bits to produce blocks of n bits (n−3 information bits plus three parity bits associated with the n information bits). Each of the blocks of n bits are Gray mapped to three QAM symbols that are modulated onto an optical wavelength and transmitted to a receiver. A maximum a posteriori (MAP) decoder is used at the receiver to correct for cycle slip. 1. A system comprising:a parity bit encoder configured to encode successive blocks of n−3 bits with three parity bits to provide successive blocks of n bits;a Gray mapper coupled to said parity bit encoder and configured to map each one of said blocks of n bits to three associated quadrature amplitude modulated (QAM) symbols;a modulator coupled to said Gray mapper and configured to modulate an optical signal in response to an output of said Gray mapper to provide a modulated optical signal comprising said three associated QAM symbols;a detector for receiving said modulated optical signal and providing an electrical signal representative of said optical signal; anda de-mapper configured to provide a de-mapper output representative of said blocks of n−3 bits in response to said electrical signal.3. A system according to claim 2 , wherein said parity bit encoder is configured to position said three parity bits within said n bits according to the following:{'sub': '1', 'Pis positioned anywhere in the first 2n/3 bits;'}{'sub': '2', 'sup': th', 'th, 'Pis positioned anywhere between the 2n/3+1bit and the 5n/6bit; and'}{'sub': 3', '2, 'sup': th', 'th, 'Pis positioned anywhere between the 2n/3+1and the nbits that is different from the position of P.'}4. A system according to claim 1 , wherein said de-mapper is configured to provide said de-mapper output by selecting a second one of said three associated QAM symbols based on a Hamming weight of a first one of said three associated QAM symbols.6. A system ...

OPTOELECTRONIC ASSEMBLY FOR SIGNAL CONVERSION

Aspects of the present disclosure include an optoelectronic assembly with a housing that defines a cavity and includes a first component and a glass component disposed on an opposite side of the cavity from the first component. The glass component may include a first surface and a second surface and a lens located on the first surface. An optical transmitter and/or an optical receiver may be mechanically coupled to the first component within the cavity and oriented to emit optical signals through the glass component and the lens. Conductive traces may be located on the second surface of the glass component and electrically coupled to the optical transmitter and/or the optical receiver. An electronic component may be coupled to at least one of the conductive traces. 1. An optoelectronic assembly , comprising:a housing that defines a cavity, wherein the housing comprises a first component and a glass component disposed on an opposite side of the cavity from the first component, and wherein the glass component includes a first surface and a second surface;a lens located on the first surface of the glass component;an optical transmitter mechanically coupled to the first component within the cavity and oriented to emit optical signals through the glass component and the lens;an optical receiver mechanically coupled to the first component within the cavity;a plurality of conductive traces located on the second surface of the glass component and electrically coupled to the optical transmitter and the optical receiver; andan electronic component coupled to at least one of the plurality of conductive traces.2. The optoelectronic assembly of claim 1 , wherein the first component comprises a metal with a coefficient of thermal expansion less than 20 ppm/° C.3. The optoelectronic assembly of claim 1 , wherein the first component comprises a nickel-cobalt ferrous alloy.4. The optoelectronic assembly of claim 1 , wherein at least one of the conductive traces includes a first ...