Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 2904. Отображено 100.
19-07-2012 дата публикации

Cognitive multi-user ofdma

Номер: US20120182875A1
Автор: Amer A. Hassan, Christian Huitema
Принадлежит: Microsoft Corp

A computing device operating according to a frequency division multiplexed protocol in which communication occurs over a signal formed from a plurality of sub-channels selected from anywhere in a frequency spectrum. A computing device may select sub-channels cognitively by using information about sub-channels previously deemed suitable or unsuitable by that computing device or other computing devices. A described technique for determining sub-channel suitability includes analyzing radio frequency energy in the sub-channel to detect signals generated by another computing device or high noise levels. Information may also be used to cognitively select sub-channels to be analyzed, such as by first selecting for analysis previously-used sub-channels.

Подробнее
Номер записи: 1
04-10-2012 дата публикации

Payload for a multi-beam satellite

Номер: US20120252356A1
Автор: Emmanuel Lance, Hector Fenech
Принадлежит: EUTELSAT SA

A payload includes one or more antennas for receiving polarized radiofrequency signals; a device for regenerating radiofrequency signals by filtering, frequency transposition, and amplification; and antennas for transmitting the regenerated radiofrequency signals to one or more terrestrial terminals. The regeneration device includes a plurality of regeneration channels, each channel including an amplification device capable of amplifying a plurality of radiofrequency signals having separate frequency bands, and in that the transmission antennas are capable of transmitting regenerated radiofrequency signals, via a single regeneration channel, to non-contiguous basic coverage areas, respectively, the basic coverage areas belonging to a single cellular layout that uses at least two separate frequency bands and two separate polarizations.

Подробнее
Номер записи: 2
15-11-2012 дата публикации

Communications apparatus and communications system using multicarrier transmission mode

Номер: US20120287891A1
Автор: Kazuo Kawabata, Takayoshi Ode, Yoshihiro Kawasaki
Принадлежит: Fujitsu Ltd

A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, includes a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between said communication apparatuses; a transmitter configured to transmit the frequency band information by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands; a receiver configured to receive the frequency band information by using the specific frequency band, whereby the specific frequency band among said plurality of frequency bands and at least one frequency band set among the plurality of frequency bands, other than the specific frequency band, are made variable to avoid overlap.

Подробнее
Номер записи: 3
22-11-2012 дата публикации

Communications apparatus and communications system using multicarrier transmission mode

Номер: US20120294265A1
Автор: Kazuo Kawabata, Takayoshi Ode, Yoshihiro Kawasaki
Принадлежит: Fujitsu Ltd

A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, the communication system includes a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between said communication apparatuses and a transmitter configured to transmit the frequency band information by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands and a receiver configured to receive the frequency band information by using the specific frequency band, whereby one or more of said frequency band is assigned consecutive with said specific frequency band along a frequency axis.

Подробнее
Номер записи: 4
17-01-2013 дата публикации

Capacity maximization for a unicast spot beam system

Номер: US20130017778A1
Автор: Mark J. Miller
Принадлежит: Viasat Inc

Methods, systems, and apparatuses are presented for improved satellite communications. The satellite system may comprises at least one gateway, a satellite in orbit configured to communicate with the at least one gateway and provide a plurality of spot beams, and a plurality of subscriber terminals. The spot beams may include a first spot beam to illuminate a first region and a second spot beam to illuminate a second region adjacent to and overlapping with the first region. The first spot beam as sent to at least one subscriber terminal may be affected by (1) interference from other signal sources including the second spot beam at a signal-to-interference ratio C/I and (2) noise at a signal-to-noise ratio C/N. Reception of signals from the first spot beam by the at least one of the first plurality of subscriber terminals may be interference-dominated such that C/I is less than C/N.

Подробнее
Номер записи: 5
21-03-2013 дата публикации

Apparatus and Methods for Satellite Communication

Номер: US20130069820A1
Автор: Wyler Gregory Thane
Принадлежит:

A communications system and method are disclosed that may include a constellation of satellites operating in a substantially equatorial, non-geostationary orbit; a plurality of ground stations configured to communicate with the satellites, at least one given ground station of the ground stations lacking a wired connection to any global communications network; and at least one gateway station coupled to a global communications network and to at least one said satellite, wherein each satellite includes at least one antenna having a steerable beam, the antenna being controllable to continuously direct a concentrated spot beam toward the given ground station. 1. A satellite communications system , comprising:a constellation of satellites operating in a substantially equatorial, non-geostationary orbit around the earth,wherein at least one said satellite comprises:a first antenna controllable to direct a first concentrated spot beam to at least one ground station;a second antenna controllable to direct a second concentrated spot beam to at least one gateway ground station; anda plurality of ground stations configured to communicate with said satellites, wherein at least one said ground station is configured to transfer communication connectivity away from a first satellite approaching a forbidden transmission range to a satellite in the constellation further from the forbidden transmission range.24-. (canceled)5. The satellite communications system of wherein the at least one satellite is operable to avoid interference with GEO satellite communication with a GEO sub-satellite point on the earth claim 1 , by communicating with ground stations on the earth having a minimum latitudinal angular separation from the GEO sub-satellite point.6. The satellite communications system of wherein the minimum latitudinal angular separation is 5 degrees.7. The satellite communications system of wherein the system is operable to avoid impinging on the communication reception of any ...

Подробнее
Номер записи: 6
21-03-2013 дата публикации

High Speed Multi-Mode Fiber Transmissions via Orthogonal Wavefronts

Номер: US20130071105A1
Автор: Donald C. D. Chang
Принадлежит: Spatial Digital Systems Inc

A system is provided for high speed optical fiber data transmission by generating artificial wavefronts along multiple paths exhibiting spatial mutual orthogonality. Multiple independent signal streams are “structured” over a group of different propagation paths that are coherently organized by wavefront multiplexing and de-multiplexing techniques. Therefore, signal streams with enhanced throughput and reliability may be fully recovered at destinations via embedded diagnostic signals and optimization loops. Multiple optical channels are matched with multiple orthogonal wavefronts created by a signal pre-processor. A receiving end signal post-processor dynamically aligns propagation paths via diagnostic signals and orthogonality of the propagation wavefronts electronically. The multiple optical channels are coherently bonded into a single virtual channel, thereby increasing data bandwidth while reducing interference and unwanted multi-path effects. The wavefront multiplexing and de-multiplexing functions may be performed in a dedicated signal processor or may reside in a general-purpose microprocessor located in the user terminal.

Подробнее
Номер записи: 7
23-05-2013 дата публикации

HIGHLY INTEGRATED VERY SMALL APERTURE TERMINAL (VSAT) APPARATUS AND METHOD

Номер: US20130128805A1
Автор: GREGORY Christopher D., REKLAU Matthew A., SCHWEITZER Theodore A., TANG Hai Q.
Принадлежит: VT IDIRECT, INC.

A method, and a VSAT capable of being configured for such a method, of configuring a VSAT, the steps of which are setting, while an outdoor unit of the VSAT is at a configuration location, a maximum value of the adjustable gain of the up-converting device and transmitting, from an operating location that is separate from the configuration location, transmission signals to the satellite at the transmission frequency and with a gain value of at most the maximum value of the adjustable gain set at the configuration location. 1. A system for communicating with a satellite , the system comprising:an indoor unit (IDU), including an orthogonal frequency-division multiplexer configured to combine a DC power signal and a data signal into a bi-direction transmission signal, and output the transmission signal along a coaxial cable; andan outdoor unit (ODU) including electronic devices configured to receive the transmission signal via the coaxial cable, extract the data signal from the transmission signal, amplify the transmission signal, and transmit the extracted data signal to the satellite, wherein the electronic devices are energized using the DC power signal.2. The system of claim 1 , wherein the electronic devices in the ODU includes a de-multiplexer configured to de-multiplex the transmission signal received via the coaxial cable to separate the extracted data signal from the DC power signal.3. The system of claim 1 , wherein the DC power signal has a voltage of at most 59 V and a power transmission of at most 100 Watts.4. The system of claim 1 , wherein the IDU is configured to condition the DC power signal along the coaxial cable for hot connect and hot disconnect claim 1 , wherein hot is defined as a live DC power signal.5. The system of claim 1 , wherein the IDU includes circuitry for short circuit protection.6. A system for communicating with a satellite claim 1 , comprising: a bi-directional data interface configured to transmit a first data signal along a first ...

Подробнее
Номер записи: 8
30-05-2013 дата публикации

Satellite communication network

Номер: US20130136055A1
Автор: Emil Youssefzadeh, Hans Peter Lexow, Richard Robert Forberg
Принадлежит: Emil Youssefzadeh, Hans Peter Lexow, Richard Robert Forberg

Methods and apparatus are disclosed to enable a fixed or a mobile ground based slave stations (VSAT: Very Small Aperture Terminal) in a communication network to receive TDM transmissions from and transmit TDMA burst transmissions to one or more ground-based gateway stations in a networking system that employs one or more geosynchronous satellites. Each gateway station transmits on one or more forward TDM channels to the slave stations; however, one primary gateway acts as the master station at any given time which transmits the network control messages to the slave stations (VSATs) that control their TDMA transmission behavior on the network.

Подробнее
Номер записи: 9
06-02-2014 дата публикации

Method, base station and mobile station for tdd operation in a communication system

Номер: US20140036739A1
Автор: Alan Edward Jones, Joseph Chung Shing Cheung, William John Jones
Принадлежит: Sony Corp

A method, NodeB and User Equipment for TDD operation in a communication system operating in TDD mode in a frequency band allocated for FDD operation. Preferably, operation is in TDD uplink and downlink mode in a first frequency band designated or normally used for FDD uplink communication, and in TDD downlink-only mode in a second frequency band designated or normally used for FDD downlink communication. The invention provides the following advantages: Provides a flexible method to deploy a time division duplex architecture in frequency division duplex spectrum. Allows flexible use of system capacity by adjusting the uplink and downlink capacity split. Removes previous FDD duplex restrictions.

Подробнее
Номер записи: 10
06-03-2014 дата публикации

Method and apparatus for a triple use satellite system

Номер: US20140064179A1
Автор: Adrian Morris, Dave Roos, Pradman Kaul, Stanley Kay
Принадлежит: HUGHES NETWORK SYSTEMS LLC

A triple use satellite system includes a VSAT population including a VSAT, and a satellite including a broadcast beam for a broadcast service and spot beams for a broadband service, where each of the spot beams provides broadband service to VSATs in separate coverage areas in a geographic region and the broadcast beam provides a broadcast service to the VSAT population in the geographic region.

Подробнее
Номер записи: 11
06-01-2022 дата публикации

A METHOD OF, AND APPARATUS FOR, IMPROVED SATELLITE COMMUNICATIONS

Номер: US20220006513A1
Автор: ROBSON David
Принадлежит:

There is provided a satellite network for data communication, the network comprising a plurality of satellites arranged in medium Earth orbit (MEO) in a plurality of orbital planes such that a plurality of satellites are provided in each orbital plane, each satellite being operable to communicate with at least one terrestrial user terminal and comprising at least one communications antenna operable to generate a spot beam on a predetermined selected terrestrial region to enable said one or more terrestrial user terminals to receive and/or send data via the spot beam. The plurality of satellites is arranged such that the spot beams of at least two satellites are operable to cover the same terrestrial region at any one time. 1. A satellite network for data communication , the network comprising a plurality of satellites arranged in medium Earth orbit (MEO) in a plurality of orbital planes such that a plurality of satellites are provided in each orbital plane , each satellite being operable to communicate with at least one terrestrial user terminal and comprising at least one communications antenna operable to generate a spot beam on a predetermined selected terrestrial region to enable said one or more terrestrial user terminals to receive and/or send data via the spot beam , wherein the plurality of satellites is arranged such that the spot beams of at least two satellites are operable to cover substantially the same terrestrial region at any one time.2. A satellite network according to claim 1 , wherein the plurality of satellites is arranged such that the spot beams of at least two satellites in at least two different orbital planes are operable to cover substantially the same terrestrial region at any one time.3. A satellite network according to any one of the preceding claims claim 1 , wherein each satellite is operable to communicate with at least one terrestrial gateway terminal and each satellite comprises at least one gateway antenna operable to generate a ...

Подробнее
Номер записи: 12
07-01-2021 дата публикации

METHOD AND APPARATUS FOR ESTABLISHING COMMUNICATIONS WITH A SATELLITE

Номер: US20210006327A1
Автор: Cummings Nathan, DiNallo Carlo
Принадлежит: Maxtena, Inc.

A mobile satellite radio equipped with a phased array antenna configures the phased array antenna in one or more non-directional operating modes in order to initially detect a signal from a communication satellite. Once a signal has been received from the satellite, frequency information determined in the course of operating in the one or more non-directional modes is used to configure the mobile satellite radio for operation in a subsequent stage when the phased array antenna is configured in a directional mode. In the subsequent stage the phased array antenna is used to scan a solid angle space to determine the direction of the satellite. Thereafter the antenna is used in the directional mode for satellite communication. 1. A mobile satellite radio comprising a receiver , a phased array antenna coupled to the receiver and a controller coupled to the phased array antenna and the receiver , wherein the controller is configured to:configure the phased array antenna into at least one non-directional configuration;receive signals from a satellite when operating in the at least one non-directional configuration;determine frequency information when receiving signals from the satellite when operating in the at least one non-directional configuration.2. The mobile satellite radio according to wherein said controller is further configured to configure the phased array antenna into a directional configuration and operate at a frequency that is selected based on the frequency information.3. The mobile satellite radio according to wherein said controller is further configured to scan an aim direction of the phased array antenna to search a solid angle for the satellite while operating at the frequency that is selected based on the frequency information.4. The mobile satellite radio according to wherein claim 1 , in determining frequency information claim 1 , the controller is adapted to configure the receiver to listen for signals in a plurality of different frequency bands ...

Подробнее
Номер записи: 13
02-01-2020 дата публикации

SYSTEM AND METHOD FOR RETURN END-TO-END BEAMFORMING

Номер: US20200007225A1
Автор: Buer Kenneth V., Miller Mark J.
Принадлежит:

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. A system for forming a plurality of forward user beams using end-to-end beamforming , the system comprising:means for transmitting a plurality of forward uplink signals from a plurality of geographically distributed locations, wherein the plurality of forward uplink signals is formed from a weighted combination of a plurality of user beam signals, and wherein each user beam signal corresponds to one and only one user beam; andmeans for relaying the plurality of forward uplink signals to form a plurality of forward downlink signals, wherein each forward downlink signal is formed by amplifying a unique superposition of the plurality of forward uplink signals, and wherein the plurality of forward downlink signals superimpose to form the plurality of user beams, wherein each user beam signal is dominant within the corresponding user beam,2. The system of claim 1 , further comprising:a first user terminal configured to receive a first superposition of the plurality of forward downlink signals and extract a first one of the plurality of user beam signals.3. The system of ...

Подробнее
Номер записи: 14
02-01-2020 дата публикации

DYNAMIC SATELLITE BEAM ASSIGNMENT

Номер: US20200007227A1
Автор: Becker Donald, Martin Remberto, PETRANOVICH JAMES
Принадлежит: VIASAT, INC.

Embodiments provide techniques for dynamic spot beam assignment in a geostationary satellite communications network. For example, a ground processing node in the geostationary satellite network can monitor spot beam coverage area location and can detect a beam drift trigger indicating present drifting of one or more coverage areas. Ground terminals can be identified as serviced by spot beams associated with the drifting coverage area(s) and as experiencing a signal quality impact from the drifting. The ground terminal node can compute an update to a beam assignment map having a reassignment of the identified user terminals from their presently servicing spot beams to another of the spot beams in a manner that seeks to address at least some of the signal quality impact identified as associated with the drifting. Some embodiments further account for load balancing, and/or other factors, and/or can maintain stateful communications between the reassigned user terminals and the geostationary satellite. 1. A method for dynamic beam assignment in a geostationary satellite communications network , the method comprising:receiving link measurement data that indicates signal quality at a plurality of locations within a plurality of coverage areas illuminated by a plurality of spot beams of a geostationary satellite;detecting a beam drift trigger according to the link measurement data, the beam drift trigger indicating a present drifting of a coverage area of the plurality of coverage areas illuminated by a spot beam of the plurality of spot beams of the geostationary satellite;identifying a set of ground terminals as experiencing a signal quality degradation from the present drifting; andcomputing, in a ground processing node in response to detecting the beam drift trigger, an update to a beam assignment map that at least partially counteracts the service degradation by reassigning each of the set of ground terminals from a respective presently assigned spot beam to a ...

Подробнее
Номер записи: 15
07-01-2021 дата публикации

NETWORK ADDRESSING METHOD, CONTROL STATION, AND EARTH STATION

Номер: US20210006970A1
Автор: FUKUDA Kazunobu, HIRAGI Makiko
Принадлежит: Mitsubishi Electric Corporation

In a satellite communication system to perform routing with a communication channel via a satellite, when an earth station is to enter the satellite communication system, a control station notifies the earth station, using a control channel via the satellite, of the network address of the earth station managed by the control station. After that, the earth station can establish the communication channel via the satellite. 1. A network addressing method for a satellite communication system to perform routing between earth stations with a communication channel via satellite , the network addressing method using a control station to manage network addresses of the earth stations , the network addressing method comprising:a first entry message transmission step of transmitting a first entry message from a first earth station of the earth stations to the control station using a control channel via the satellite, the first entry message being a message for entry to the satellite communication system;a first network address notification step of, in response to receiving the first entry message, notifying, by the control station, a first network address to the first earth station using the control channel, the first network address being the network address of the first earth station managed by the control station;a second entry message transmission step of transmitting a second entry message from a second earth station of the earth stations to the control station using the control channel, the second entry message being a message for entry to the satellite communication system;a second network address notification step of, in response to receiving the second entry message, notifying, by the control station, a second network address to the second earth station using the control channel, the second network address being the network address of the second earth station managed by the control station; anda communication channel establishment step of establishing, by the earth ...

Подробнее
Номер записи: 16
02-01-2020 дата публикации

Transport path-aware quality of service for mobile communications

Номер: US20200007604A1
Автор: Nirmalkumar Velayudhan, Veena Padmanabhan
Принадлежит: Viasat Inc

Embodiments provide quality of service for media content delivery over capacity-constrained communications links to user devices by exploiting usage models and path awareness. For example, one or more uncongested beams can be identified as preceding one or more congested beams (e.g., by computing a congestion map) along a predicted transport path of a user device moving through a multi-beam satellite communications system. A prediction can be made aps to one or more future requests that are likely to be made by the user device for pre-positionable types of media content, and that are likely to be serviced by one of the subsequent congested beams. When such a request for pre-positionable media content is predicted, embodiments can schedule transmission of at least a portion of the media content over one or more of the preceding uncongested beams for storage local to the user device, thereby pre-positioning the content at the client prior to reaching the congested beam.

Подробнее
Номер записи: 17
27-01-2022 дата публикации

METHOD AND SYSTEM FOR ESTIMATING ATTENUATIONS OF THE RESPECTIVE UPLINKS OF NOMINAL SATELLITE ACCESS STATION(S) TO A VHTS VERY HIGH THROUGHPUT TELECOMMUNICATIONS SATELLITE

Номер: US20220029664A1
Автор: BAUDOIN Cedric, Gachon Helene, LARUE DE TOURNEMINE Cécile, ONILLON Bertrand, VIME Sandra, VOISIN Philippe
Принадлежит:

A method for estimating, at one and the same given time, a set of attenuations of one or more first radiofrequency RF uplinks, implemented by a VHTS space telecommunications system. In an auxiliary usage step, an on-board regenerative or digital transparent processor DTP generates at least one beacon signal that is or are distributed, in the Q band, to N nominal access stations GWn(i) in order to be measured in terms of power, or measures the spectral power of each traffic signal transmitted by the nominal access stations GWn(i), i varying from 1 to N. In a following step, the attenuation levels An(i) of the uplinks LUn(i) are determined based on the powers of the one or more beacon signals that are measured on the corresponding downlinks LDn(i) in the Q band, or based on the one or more spectral powers, measured by the DTP, of the traffic signals received on the one or more uplinks LUn(i). 1. A method for estimating , at one and the same given time , a set of attenuations of one or more first very high throughput radiofrequency RF telecommunications uplinks connecting one or more first nominal satellite access stations to one and the same VHTS very high throughput telecommunications satellite ,the method for estimating the set of one or more attenuations of the one or more first radiofrequency RF uplinks being implemented by a VHTS space telecommunications system comprising:a VHTS very high throughput telecommunications satellite;{'b': '6', 'a predetermined whole number N, greater than or equal to 1, of first nominal satellite access stations GWn(i) (), i being a first index varying from 1 to N; and'}a predetermined number P, greater than or equal to 1, of second diversity satellite access stations GWp(j), j being a second index varying from 1 to P; anda plurality of user terminals, and a space telecommunications system control and coordination station, configured so as to manage diversity,each first nominal satellite access station GWn(i) having a first very high ...

Подробнее
Номер записи: 18
11-01-2018 дата публикации

ROBUST BEAM SWITCH SCHEDULING

Номер: US20180013488A1
Автор: "ONeill John Hai", Becker Donald W., Miller Mark J.
Принадлежит:

Systems and methods are described for robust scheduling of beam switching patterns in satellite communications systems. Embodiments operate in context of a hub-spoke satellite communications architecture having a number of gateway terminals servicing large numbers of user terminals over a number of spot beams. The satellite includes switching subsystems that distribute capacity to the user beams from multiple of the gateway terminals in a shared manner according to a beam group switching pattern. The beam group switching pattern is robustly formulated to continue distributing capacity during gateway outages (e.g., when one or two gateway terminals are temporarily non-operational due to rain fade, equipment failure, etc.). For example, the beam group switching pattern can be formulated to minimize worst-case degradation of capacity across user beams, to prioritize certain beams or beam groups, etc. 132.-. (canceled)33. A method for robust sharing of gateway resources via a satellite comprising a plurality of input subsystems associated with a plurality of input beams , and comprising a plurality of output subsystems associated with a plurality of output beams , the satellite configured to sequentially couple the input subsystems with the output subsystems in each of a plurality of time slots of a frame according to a beam group switching pattern , the method comprising:receiving, by a core node, forward-link communications destined for a destination output beam of the plurality of output beams during the frame, wherein a destination output subsystem of the plurality of output subsystems is associated with the destination output beam;identifying, by the core node, multiple source input beams of the plurality of input beams that are associated with multiple input subsystems to be coupled with the destination output subsystem during the frame according to the beam group switching pattern, wherein each of the multiple input subsystems is to be coupled with the ...

Подробнее
Номер записи: 19
10-01-2019 дата публикации

COMMUNICATION DEVICE FOR PROCESSING INTERFERENCE BETWEEN SIGNALS TRANSMITTED IN NEIGHBOURING TRANSMITTING SPOTS, METHOD ASSOCIATED THEREWITH

Номер: US20190013861A1
Автор: COURSON Jean-Paul, Le Pera Alessandro, Roux Laurent
Принадлежит:

A communication device for transmitting a plurality of wanted signals to a satellite from a transmitter, each of the wanted signals transmitted by the device being for being addressed to a given transmitting spot, the device including a set of reference values of powers and phases of at least a first reference signal received at different points of at least one transmitting spot, a first wanted signal generating an interfering signal in a neighbouring spot, the transmitter generating at least one wanted neighbouring signal in a neighbouring spot of the first spot, the transmitter generating a first correcting signal from the first signal transmitted and at least a first phase value and a first power value of a set of reference values, the transmitter transmitting a combination of the correcting signal and of the neighbouring signal in order to generate a corrected neighbouring signal. 1. A communication device for transmitting a plurality of signals to a satellite from a transmitter , said transmitter including at least one transmitting antenna and a modem , each of the signals transmitted by the device being for being addressed to a given transmitting spot via the satellite , a transmitting spot having a predefined geographical coverage of an antenna of the satellite , said communication device including a memory including a set of reference values of powers and phases of at least a first reference signal received at different points of at least one transmitting spot , a first wanted signal being transmitted in a first spot and generating an interfering signal in a neighbouring spot , the transmitter adapted to generate at least one wanted neighbouring signal for being transmitted in a neighbouring spot of the first spot and being disturbed by the interfering signal , the transmitter adapted to generate a first correcting signal from the first transmitted signal and at least a first phase value and a first power value of the set of reference values , said phase and ...

Подробнее
Номер записи: 20
15-01-2015 дата публикации

Apparatus and method for remote beam forming for dbs satellites

Номер: US20150016240A1
Автор: Donald C.D. Chang
Принадлежит: Spatial Digital Systems Inc

A satellite broadcasting system is achieved where remote beam forming processors combined with wavefront multiplexers located among distributed ground stations are used to control downlink beam footprints and pointing directions. Digital beam forming (DBF) techniques allow a single satellite download broadcast antenna array to generate multiple independently pointed simultaneous downlinks, which may contain distinct information content. Allocation of some uplink back-channel elements as diagnostic signals allows for continuous calibration of uplink channels, improving downlink broadcast array and user broadcast performance. Wavefront multiplexing/demultiplexing allows all array element signals to be radiated by the broadcasting antenna array, with simultaneous propagation from ground stations to the broadcasting satellites through available parallel propagation channels in the uplinks of feeder links, with equalized amplitude and phase differentials. Further, additional wavefront multiplexing/demultiplexing pairs are further used to coherently broadcast signals from a remote beam forming facility on ground to cover areas through multiple broadcasting satellites.

Подробнее
Номер записи: 21
09-01-2020 дата публикации

CONFIGURABLE BEAM FAILURE EVENT DESIGN

Номер: US20200014440A1
Автор: Akoum Salam, Ghosh Arunabha, Wang Xiaoyi
Принадлежит:

Determining when beam failure of a beam pair link has occurred is provided. Transient obstructions, and other interference effects can cause the failure of a beam pair link which can comprise a transmit beam and a receive beam associated with respective antennas on a transmitter and receiver. Switching to another beam pair link can cause decrease throughput and efficiency however, so the improved mechanism for determining a failure includes taking into consideration the importance of the beam pair link before initiating the beam recovery process. The configurable beam failure protocol defined herein considers the relative importance of the configured beam pair links when declaring the beam pair link a failure. The importance of the beam pair link can be based on the amount of downlink control information in the transmission. 1. A method , comprising:determining, by a device comprising a processor, that a transmission received from a transmitter antenna of a base station device comprises a defined amount of downlink control information;determining, by the device, that a reference signal associated with the transmission does not satisfy a defined criterion related to a signal quality of the reference signal; anddetermining, by the device, that a beam failure of a beam pair link between the transmitter antenna of the base station device and a receiver antenna has occurred in response to the reference signal being determined not to satisfy the defined criterion related to the signal quality.2. The method of claim 1 , wherein the determining that the transmission comprises the defined amount of downlink control information is based on a number of decoding candidates determined to be represented in the transmission.3. The method of claim 2 , wherein the determining that the beam failure of the beam pair link between the transmitter antenna and the receiver antenna has occurred further comprises:determining that the beam failure of the beam pair link has occurred in ...

Подробнее
Номер записи: 22
09-01-2020 дата публикации

HIGH THROUGHPUT SATELLITES AND METHODS OF OPERATING HIGH THROUGHPUT SATELLITES FOR RELAYING DATA BETWEEN LOW EARTH ORBIT SATELLITES TO ENDPOINTS

Номер: US20200014460A1
Автор: CHAN Man Hei, HU Hai, LEUNG Harry Yin Chung, TONG Roger Shun Hong, VONG Fred Chun Yin, YIP Kat Fan
Принадлежит:

A high throughput satellite (HTS) and a method of operating the HTS for relaying data between a low earth orbit (LEO) satellite and a target ground station, where the HTS provides spot beams for a spot beam coverage area. The method of operating the HTS includes: determining an estimated trajectory of an orbiting LEO satellite; assigning a plurality of assigned spot beams having a matching color re-use polarization; and transmitting assignments of the plurality of assigned spot beams to the high throughput satellite to cause the high throughput satellite to maintain the inter-satellite link via a first spot beam and one or more assigned subsequent spot beams having the matching color re-use polarization. 1. A method of operating a high throughput satellite for relaying data between one or more low earth orbit (LEO) satellites and a target ground station , the high throughput satellite providing a plurality of spot beams for a spot beam coverage area , the method comprising:determining an estimated trajectory of an orbiting LEO satellite travelling through the spot beam coverage area;assigning, based on the estimated trajectory, a plurality of assigned spot beams having a matching color re-use polarization for maintaining an inter-satellite link between the orbiting LEO satellite and the high throughput satellite as the orbiting LEO satellite travels through the spot beam coverage area; andtransmitting assignments of the plurality of assigned spot beams to the high throughput satellite to cause the high throughput satellite to maintain the inter-satellite link via a first spot beam and one or more assigned subsequent spot beams having the matching color re-use polarization.2. The method of claim 1 , wherein transition of the inter-satellite link from the first spot beam to the one or more assigned subsequent spot beams utilizes frequency transition.3. The method of claim 1 , further comprising:prior to assigning the plurality of assigned spot beams for maintaining ...

Подробнее
Номер записи: 23
09-01-2020 дата публикации

WIRELESS COMMUNICATION LOCATION REPORTING AND PAGING

Номер: US20200014461A1
Автор: Kapoor Rohit, Lucky Kundan Kumar, PURKAYASTHA Punyaslok, Ulupinar Fatih
Принадлежит:

The disclosure relates in some aspects to location reporting and paging for satellite communication. In one aspect, the disclosure relates to a user terminal (UT) sending a message to report information about the UT's location. A threshold may be used to control whether (e.g., when) the UT reports its location. The location information may be used to enforce area (e.g., country) restrictions for the UT. In one aspect, the disclosure relates to forwarding paging messages between network access controllers. For example, a network access controller that is not able to page a UT may forward a paging message to another network access controller. In one aspect, the disclosure relates to a list of paging areas that indicates where a UT need not perform a paging area update. 1. A method of wireless communication by a user terminal , the method comprising: receiving, from a network, an idle mode threshold distance and a connected mode threshold distance;', 'based on whether the user terminal is in an idle mode or a connected mode, selecting a threshold distance from the idle mode threshold distance received from the network and the connected mode threshold distance received from the network;', 'detecting that a change in a location of the user terminal satisfies the selected threshold distance; and', 'sending, to the network, a message including location information of the user terminal in response to detecting that a change in a location of the user terminal satisfies the selected threshold distance., 'by one or more processors of the user terminal2. The method of claim 1 , wherein the location information comprises geographic coordinates indicative of a current location of the user terminal.3. The method of claim 1 , wherein the location information indicates a velocity vector of the user terminal.4. The method of claim 1 , wherein the location information indicates an acceleration vector of the user terminal.5. The method of claim 1 , wherein the message further includes ...

Подробнее
Номер записи: 24
18-01-2018 дата публикации

PARTITIONED PHASED ARRAY FED REFLECTOR ANTENNA SYSTEM

Номер: US20180019523A1
Автор: Buer Kenneth V.
Принадлежит:

Systems and methods for partitioned phased array fed (PAFR) antennas with improved throughput capacity are disclosed. The phased array in a PPAFR antenna is partitioned into multiple partitions of antenna elements that can be operated by corresponding beam forming networks with reduce sized, weight, and power consumption characteristics to independently and simultaneously to generate angularly offset static and dynamic spot beams patterns. The independently generated spot beam patterns can be configured to include transmission and receiving spot beams for establishing a number of pathways. Accordingly, the number of pathways a particular partitioned PAFR antenna system can support relative to an unpartitioned PAFR antenna system can be increased while also using smaller and lighter configurations of beam forming networks. 1. (canceled)2. A phased array fed reflector comprising:a reflector;an array of antenna elements arranged relative to the reflector; anda plurality of beam forming networks coupled to the array of antenna elements, the plurality of beam forming networks including:a first beam forming network coupled to only a first partition of antenna elements in the array of antenna elements, wherein the first partition includes a first subset of antenna elements that are exclusive to the first partition, and further includes a second subset of antenna elements that are non-exclusive to the first partition, the first beam forming network having a first port for a first beam signal that is communicated only between the first beam forming network and the first partition and having a first beam weight circuit to generate a first spot beam associated with the first beam signal using the first partition of antenna elements; anda second beam forming network coupled to only a second partition of antenna elements in the array of antenna elements, wherein the second partition includes a third subset of antenna elements that are exclusive to the second partition, and ...

Подробнее
Номер записи: 25
18-01-2018 дата публикации

Ground network with access node clusters for end-to-end beamforming

Номер: US20180019804A1
Автор: Christopher J. Cronin, Donald L. Runyon, Kenneth V. Buer, Mark D. Dankberg, Mark J. Miller
Принадлежит: Viasat Inc

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams.

Подробнее
Номер записи: 26
18-01-2018 дата публикации

FORWARD AND REVERSE CALIBRATION FOR GROUND-BASED BEAMFORMING

Номер: US20180019810A1
Автор: Sayegh Soheil
Принадлежит:

Methods and systems for calibrating the return and forward links of a satellite communication system are provided according to embodiments of the invention. The phase and/or amplitude variations caused by the return and forward links are calculated and/or estimated to aid in beamforming, such as ground-based beamforming. Calibration earth stations, distributed within one or more beam patterns, may be used to transmit calibration codes to the gateway to calibrate the return link. Return links variations may be estimated using a weighted minimum mean square algorithm at the gateway. Forward links may be calibrated with calibration codes transmitted from the gateway through a hybrid matrix to at least one calibration station. Forward calibration links may also calibrate for temperature-dependent signal variations such as diplexer variations at the satellite. 1. A method for wireless communication over a satellite return link , the method comprising:receiving a signal comprising a linear combination of a plurality of orthogonal codes, the plurality of orthogonal codes transmitted by a plurality of calibration stations and received at a satellite by a plurality of satellite feeds, the satellite retransmitting the linear combination of the plurality of orthogonal codes, wherein at least two of the plurality of calibration stations are located within distinct satellite beam coverage areas;performing a correlation on the received plurality of orthogonal codes to obtain at least one of amplitude or phase information of signal paths originating from the plurality of calibration earth stations and passing through the satellite;estimating at least one of amplitude or phase effects of the satellite return link by applying an estimating function to the at least one of amplitude or phase information; andcommunicating on the satellite return link based at least in part on the at least one of amplitude or phase effects of the satellite return link.2. The method of claim 1 , wherein ...

Подробнее
Номер записи: 27
18-01-2018 дата публикации

SYSTEM FOR END-TO-END BEAMFORMING WITH MULTI-FREQUENCY ACCESS NODES

Номер: US20180019811A1
Автор: Buer Kenneth V., Cronin Christopher J., Dankberg Mark D., Miller Mark J., RUNYON DONALD L.
Принадлежит:

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. A system for providing a communication service to user terminals geographically distributed over a user coverage area via an end-to-end relay comprising multiple receive/transmit signal paths , comprising:a beam signal interface that obtains multiple forward beam signals comprising forward user data streams for transmission to a plurality of the user terminals grouped by multiple forward user beam coverage areas;a beam weight generator that generates a forward beam weight matrix for end-to-end beamforming from a plurality of geographically distributed locations to the multiple forward user beam coverage areas via the end-to-end relay, the forward beam weight matrix based at least in part on a first forward uplink channel matrix for forward uplink channels between the plurality of geographically distributed locations and the end-to-end relay over a first frequency range and a second forward uplink channel matrix for the forward uplink channels over a second frequency range, wherein the second frequency range is non-overlapping with the first frequency range;a ...

Подробнее
Номер записи: 28
18-01-2018 дата публикации

FLEXIBLE HIGH THROUGHPUT SATELLITE SYSTEM USING OPTICAL GATEWAYS

Номер: US20180019816A1
Автор: Gallagher Vijaya, Turgeon Ghislain, Wang Leah
Принадлежит: SPACE SYSTEMS/LORAL, LLC

Described herein are ground based subsystems, and related methods, for use in transmitting an optical feeder uplink beam to a satellite that is configured to receive the optical feeder uplink beam and in dependence thereon produce and transmit a plurality of RF service downlink beams within a specified RF frequency range to service terminals. Certain embodiments are related to a resource allocator for inclusion in a ground based subsystem, and methods for use therewith. Beneficially, the resource allocator, and methods for use therewith, eliminate any need for a satellite to perform any bandwidth allocation for the plurality of service downlink beams produced and transmitted by the satellite, thereby eliminating any need for the satellite to include an on-board channelizer. Such a recourse allocator can include a plurality of channels each of which can include an encoder and modulator, a channel filter, and a frequency up-converter. 1. A ground based subsystem for use in transmitting an optical feeder uplink beam to a satellite that is configured to receive the optical feeder uplink beam and in dependence thereon produce and transmit a plurality of RF service downlink beams within a specified RF frequency range to service terminals , the ground based subsystem comprising:a resource allocator configured to receive a plurality of data modulated RF carrier signals each of which has an RF frequency within an intermediate frequency (IF) range, and configured to encode, modulate, filter and frequency up-convert each of the data modulated RF carrier signals to thereby produce a plurality of bandwidth allocated data modulated RF signals;a plurality of lasers, each of the lasers operable to emit an optical signal having a different peak wavelength within a specified optical wavelength range;a plurality of electro-optical modulators (EOMs), each of the EOMs configured to receive an optical signal from a respective one of the plurality of lasers, receive a different bandwidth ...

Подробнее
Номер записи: 29
17-01-2019 дата публикации

ACTIVE REPEATER DEVICE FOR OPERATIONAL MODE BASED BEAM PATTERN CHANGES FOR COMMUNICATION WITH A PLURALITY OF USER EQUIPMENT

Номер: US20190020402A1
Автор: Boers Michael, Gharavi Sam, Rofougaran Ahmadreza, Rofougaran Maryam, SHIN Donghyup, SHIRINFAR Farid, Sridharan Kartik, WU Stephen, Yoon Seunghwan
Принадлежит:

An active repeater device includes a primary sector and at least a secondary sector communicatively coupled to the primary sector receives or transmits a first beam of input RF signals having a first beam pattern from or to a base station, respectively. The primary sector includes an baseband signal processor and a first radio head (RH) unit. The secondary sector comprises a second RH unit. The first beam pattern covers a first geographical area. Beamforming coefficients are generated to convert the first beam pattern of the first beam of input RF signals to a second beam pattern. A second beam of output RF signals in the second beam pattern is transmitted from or received by, respectively, the secondary sector to or from, respectively, a plurality of user equipment (UEs) based on the generated beamforming coefficients and the received first beam of input RF signals. 1. An active repeater device , comprising: a first antenna array of the first RH unit is configured to receive or transmit a first beam of input RF signals having a first beam pattern from or to a base station, respectively, wherein the first beam pattern covers a first geographical area;', 'a controller of the baseband signal processor is configured to generate beamforming coefficients to convert the first beam pattern of the first beam of input RF signals to a second beam pattern based on a first operating mode, of a plurality of operating modes, set in the active repeater device; and, 'a primary sector that includes a baseband signal processor and a first radio head (RH) unit, wherein'} 'a second antenna array of the second RH unit is configured to transmit or receive a second beam of output RF signals in the second beam pattern to or from, respectively, a plurality of user equipment (UEs) based on the generated beamforming coefficients in the first operating mode and the received first beam of input RF signals, wherein the second beam pattern is wider than the first beam pattern and covers a second ...

Подробнее
Номер записи: 30
17-01-2019 дата публикации

ACTIVE REPEATER DEVICE SHARED BY MULTIPLE SERVICE PROVIDERS TO FACILITATE COMMUNICATION WITH CUSTOMER PREMISES EQUIPMENT

Номер: US20190020407A1
Автор: Boers Michael, Gharavi Sam, Rofougaran Ahmadreza, Rofougaran Maryam, SHIN Donghyup, SHIRINFAR Farid, Sridharan Kartik, WU Stephen, Yoon Seunghwan
Принадлежит:

An active repeater device including a first antenna array, a controller, and one or more secondary sectors receives or transmits a first beam of input RF signals from or to, respectively, a first base station operated by a first service provider and a second beam of input RF signals from or to, respectively, a second base station operated by a second service provider. A controller assigns a first beam setting to a first group of customer premises equipment (CPEs) and a second beam setting to a second group of CPEs, based on one or more corresponding signal parameters associated with the each corresponding group of CPEs. A second antenna array of the second RH unit concurrently transmits or received a first beam of output RF signals to or from the first group of CPEs and a second beam of output RF signals to the second group of CPEs. 1. An active repeater device , comprising: a first antenna array of the first RH unit is configured to receive or transmit a first beam of input RF signals from or to, respectively, a first base station operated by a first service provider and a second beam of input RF signals from a second base station operated by a second service provider;', 'a controller of the baseband signal processor is configured to assign a first beam setting from a plurality of beam settings to a first group of customer premises equipment (CPEs) and a second beam setting from the plurality of beam settings to a second group of CPEs of a plurality of groups of CPEs, based on one or more corresponding signal parameters associated with the first group of CPEs and the second group of CPEs, wherein the first beam setting is different than the second beam setting; and, 'a primary sector that includes a baseband signal processor and a first radio head (RH) unit, wherein'} 'a second antenna array of the second RH unit is configured to concurrently transmit or receive a first beam of output RF signals to or from, respectively, the first group of CPEs associated with the ...

Подробнее
Номер записи: 31
21-01-2021 дата публикации

WIRELESS COMMUNICATION SYSTEMS FOR AIRCRAFT

Номер: US20210021028A1
Автор: BJURSTRÖM JOEL, EKLUND PETER, KARLSSON MATS
Принадлежит:

Wireless communication systems for an aircraft are disclosed. In an embodiment, the wireless communication system includes a router, an antenna, a control unit, and an antenna steering unit. The router is connected to the antenna. The router is configured to transmit and receive wireless data communication to and from a stationary communication server outside the aircraft through at least one ground base station via the antenna. The antenna is a directional antenna. The control unit is configured to determine an attitude change of the aircraft by determining a change in at least one of a roll angle, a pitch angle, and a yaw angle of the aircraft. The antenna steering unit is connected to the control unit. The antenna steering unit is configured to steer an antenna beam of the directional antenna based on the attitude change of the aircraft. 1. A wireless communication system for an aircraft comprising: a router , an antenna , a control unit , and an antenna steering unit; wherein:the router is connected to the antenna;the router is configured to transmit and receive wireless data communication to and from a stationary communication server outside the aircraft through at least one ground base station via the antenna;the antenna is a directional antenna;the control unit is configured to determine an attitude change of the aircraft by determining a change in at least one of a roll angle, a pitch angle, and a yaw angle of the aircraft;the antenna steering unit is connected to the control unit; andthe antenna steering unit is configured to steer an antenna beam of the directional antenna based on the attitude change of the aircraft.2. The wireless communication system according to claim 1 , wherein the antenna steering unit steers the antenna beam of the directional antenna to compensate for the attitude change.3. The wireless communication system according to claim 1 , wherein the antenna steering unit steers the antenna beam of the directional antenna to maintain a ...

Подробнее
Номер записи: 32
21-01-2021 дата публикации

SYSTEM AND METHOD FOR RETURN END-TO-END BEAMFORMING

Номер: US20210021335A1
Автор: Buer Kenneth V., Miller Mark J.
Принадлежит:

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. A method for forming a return user beam using end-to-end beamforming , the method comprising:creating a plurality of return downlink signals from a received return uplink signal transmitted from a reference location in a return user beam coverage area;transmitting the plurality of return downlink signals to a plurality of geographically distributed reception locations;receiving a respective a superposition of the plurality of return downlink signals at each reception location to form a composite return signal; andapplying return beam weights to the plurality of composite return signals, the beam weights computed for end-to-end multipath channels that couple the reference location in the return user beam coverage area with the plurality of reception locations.2. The method of claim 1 , wherein the creating comprises:receiving a respective return uplink signal via each of a plurality of collocated communication paths, each return downlink signal created from a corresponding one of the received return uplink signals.3. The method of claim 1 , further comprising: ...

Подробнее
Номер записи: 33
21-01-2021 дата публикации

MULTICAST DELIVERY DESTINATION DESIGNATION METHOD, TRANSMITTING STATION, AND RECEIVING STATION

Номер: US20210021569A1
Автор: FUKUDA Kazunobu, HIRAGI Makiko
Принадлежит: Mitsubishi Electric Corporation

Delivery destination designation information, pertaining to a multicast address to which per-multicast-address delivery is requested by a communication terminal connected to a receiving station, is transmitted from the receiving station to a transmitting station, the transmitting station generates a multicast delivery destination table, in which a multicast address to which the delivery is requested from the communication terminal is associated to the communication terminal, from the delivery destination designation information received from a plurality receiving stations, and the transmitting station refers to the multicast delivery destination table when performing multicast transmission via a satellite. 1: A multicast delivery destination designation method for designating a delivery destination between a transmitting station which performs a multicast transmission via a satellite and a plurality of receiving stations , the multicast delivery destination designation method comprising:a delivery destination designating step of transmitting delivery destination designation information from the receiving station to the transmitting station, the delivery destination designation information pertaining to a multicast address to which per-multicast-address delivery is requested by a communication terminal connected to the receiving station;a delivery destination table generating step of generating, by the transmitting station, a multicast delivery destination table, in which a multicast address to which the delivery is requested from the communication terminal is associated to the communication terminal, from the delivery destination designation information received from the plurality of receiving stations; anda delivery destination referencing step of referring to the multicast delivery destination table when the transmitting station performs the multicast transmission via the satellite.2: The multicast delivery destination designation method according to claim 1 , ...

Подробнее
Номер записи: 34
10-02-2022 дата публикации

HIGH-POWER FLEXIBLE-POLARIZATION IN-ORBIT-CALIBRATION SATELLITE PAYLOAD

Номер: US20220043160A1
Автор: Blain Jean-Francois, GINGRAS Claude, TREMBLAY Michel, WU Haiqing
Принадлежит: Macdonald, Dettwiler and Associates Corporation

A system of architecture, apparatus and calibration method is invented for high-power flexible-polarization payload for satellite communications. The system comprises onboard phase-tracked apparatus, flexible polarization mechanism, and in-orbit calibration method. The power combining and polarization performance of the phase-tracked payload is monitored on ground by measuring the cross-polarization discrimination (XPD) and/or axial ratio (AR). The high performance over the life is achieved by optimization of the XPD or AR on ground and adjusting complex gain of the transponders. The high-power flexible-polarization in-orbit-calibration payload may be applied but not limited to UHF, L, S, C, X, Ku and Ka-band high power satellite systems. 1. A high-power flexible-polarization satellite payload system for satellite communications , the system comprising:a centralized On-Board Processor (OBP) connecting to a transmit chain having a first and a second transmit paths and a receive chain having a first and a second receive paths, said first transmit and first receive paths connecting to a first transmit/receive duplexer, said second transmit and second receive paths connecting to a second transmit/receive duplexer, said first and second transmit/receive duplexer connecting to a two polarization antenna for transmitting and receiving signals;said first and second transmit paths transmitting an in-phase and a quadrature phase output signals, respectively, said first and second receive paths receiving an in-phase and a quadrature phase input signals, respectively; anda phase-tracked apparatus adjusting a respective phase and/or amplitude of said in-phase and quadrature phase output signals in said transmit chain for power combination of said in-phase and quadrature phase output signals at said two-polarization antenna, and a respective phase of said in-phase and quadrature phase input signals in said receive chain.2. The system of claim 1 , wherein said phase-tracked ...

Подробнее
Номер записи: 35
28-01-2016 дата публикации

MULTIPLE-PORT SIGNAL BOOSTERS

Номер: US20160028469A1
Автор: Ashworth Christopher K., Van Buren Vernon A.
Принадлежит:

A system is disclosed that includes a first interface port, a second interface port, a signal splitter device, a main booster, and a front-end booster. The signal splitter device may include first, second, and third splitter ports. The signal splitter device may be configured such that a first direction signal received at either of the second and third splitter ports is output at the first splitter port and a second direction signal that is received at the first splitter port is output at each of the second and third splitter ports. The main booster may include main first and second direction amplification paths that are each communicatively coupled between the first splitter port and the first interface port. The front-end booster may include front-end first and second direction amplification paths that are each communicatively coupled between the second splitter port and the second interface port. 1. A signal booster , comprising: a first signal power level detector configured to detect a first power level of a first signal; and', 'a first gain unit with a first adjustable gain configured to be applied to the first signal, the first adjustable gain adjusted based on the first power level;, 'a first front-end booster including a second signal power level detector configured to detect a second power level of a second signal; and', 'a second gain unit with a second adjustable gain configured to be applied to the second signal, the second adjustable gain adjusted based on the second power level;, 'a second front-end booster including receive the first signal after the application of the first adjustable gain;', 'receive the second signal after the application of the second adjustable gain; and', 'combine the first and second signals to form a third signal; and, 'a signal combiner device configured to a third signal power level detector configured to detect a third power level of the third signal; and', 'a third gain unit with a third adjustable gain configured to be ...

Подробнее
Номер записи: 36
25-01-2018 дата публикации

TRANSMISSION CONTROL DEVICE, RADIO COMMUNICATION SYSTEM, AND CALIBRATION METHOD

Номер: US20180026690A1
Автор: DATEKI Takashi, JITSUKAWA Daisuke
Принадлежит: FUJITSU LIMITED

A transmission control device includes a memory and a processor connected to the memory. The processor executes a process including: selecting a reference transmission point as a starting point of generating a link from among a plurality of transmission points of which each wirelessly transmits a signal; sequentially selecting the transmission points one by one for each hierarchy corresponding to a number of hops from the selected reference transmission point and retrieving ones of the transmission points for which radio quality between the ones and the selected transmission point satisfies a predetermined criterion; and generating a link between the selected transmission point and a transmission point, among the transmission points obtained as a result at the retrieving, not connected to others of the transmission points to connect the two transmission points. 1. A transmission control device comprising:a memory; anda processor connected to the memory, wherein selecting a reference transmission point as a starting point of generating a link from among a plurality of transmission points of which each wirelessly transmits a signal;', 'sequentially selecting the transmission points one by one for each hierarchy corresponding to a number of hops from the selected reference transmission point and retrieving ones of the transmission points for which radio quality between the ones and the selected transmission point satisfies a predetermined criterion; and', 'generating a link between the selected transmission point and a transmission point, among the transmission points obtained as a result at the retrieving, not connected to others of the transmission points to connect the two transmission points., 'the processor executes a process comprising2. The transmission control device according to claim 1 , wherein causing the plurality of transmission points to transmit and receive a calibration signal via the link generated between the plurality of transmission points; and', ' ...

Подробнее
Номер записи: 37
25-01-2018 дата публикации

SATELLITE FOR END-TO-END BEAMFORMING WITH NON-OVERLAPPING FEEDER AND USER FREQUENCIES

Номер: US20180026709A1
Автор: Buer Kenneth V., Miller Mark J.
Принадлежит:

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. A satellite for providing communications between a plurality of access nodes and a plurality of user terminals , the plurality of access nodes geographically distributed over an access node coverage area and the plurality of user terminals geographically distributed over a user coverage area , the satellite comprising:a feeder-link antenna subsystem to illuminate the plurality of access nodes, wherein the feeder-link antenna subsystem comprises a plurality of cooperating feeder-link constituent transmit elements and a plurality of cooperating feeder-link constituent receive elements;a user-link antenna subsystem to illuminate the user coverage area comprising a plurality of cooperating user-link constituent transmit elements and a plurality of cooperating user-link constituent receive elements;a first plurality of forward-link transponders, each coupled between one of the feeder-link constituent receive elements and one of the user-link constituent transmit elements, the first plurality of forward-link transponders receiving first forward composite uplink signals ...

Подробнее
Номер записи: 38
25-01-2018 дата публикации

CROSS-BAND SYSTEM FOR END-TO-END BEAMFORMING

Номер: US20180026710A1
Автор: Buer Kenneth V., Miller Mark J.
Принадлежит:

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. A system for providing a communication service to user terminals geographically distributed over a user coverage area , comprising:a beam signal interface that obtains multiple forward beam signals comprising forward user data streams for transmission to the user terminals grouped by multiple forward user beam coverage areas;a beam weight generator that generates a forward beam weight matrix for end-to-end beamforming to the multiple forward user beam coverage areas;a beamformer coupled with the beam signal interface and the beam weight generator, the beamformer comprising a forward matrix multiplier that obtains a plurality of access-node specific forward signals based on a matrix product of the forward beam weight matrix and a vector of the forward beam signals;a plurality of access nodes geographically distributed within an access node area, wherein the plurality of access nodes comprise transmitters that transmit respective forward uplink signals over a feeder uplink frequency range based on respective ones of the plurality of access node-specific forward signals ...

Подробнее
Номер записи: 39
24-01-2019 дата публикации

Hybrid Processor With Switching Control Based on Dynamic Bandwidth Allocation for Multi-Beam Satellite Systems

Номер: US20190028185A1
Автор: Giancristofaro Domenico, Lulli Guglielmo, Moca Cinzia, Pastore Gaetano, Tomasicchio Giuseppe
Принадлежит: Thales Alenia Space Italia S.p.A. Con Unico Socio

A hybrid processor system for use on board a telecommunications multi-beam satellite is provided that is controllable by a network control centre via one or more control channels. The system links to ground terminals by: providing uplink and downlink traffic channels on several satellite beams; routing atomic switched information blocks from the uplink traffic channels to the downlink traffic channels; and exchanging signaling data with the ground terminals on one or more uplink signaling channels and one or more downlink signaling channels. The atomic switched information blocks have the same given time duration and the same given baseband bandwidth. The hybrid processor system includes a burst switching processor and an on-board processor controller which is configured to store service information items indicative of: the given time duration and the given baseband bandwidth of the atomic switched information blocks; the respective uplink bandwidth, the respective uplink frequencies, a respective time length of the respective uplink time slots, and respective structure features of the respective uplink time frames and superframes of each uplink channel; the respective downlink bandwidth, the respective downlink frequencies, a respective time length of the respective downlink time slots, and respective structure features of the respective downlink time frames and superframes of each downlink channel; and quality of service and priority rules for serving the ground terminals. The on-board processor controller is further configured to extract, from incoming signaling data capacity requests sent by the ground terminals by demodulating and decoding the incoming signaling data. 11. Hybrid processor system () for use on board a telecommunications multi-beam satellite , wherein said telecommunications multi-beam satellite is controllable by a network control centre via one or more control channels , and is designed to link ground terminals by:providing uplink and downlink ...

Подробнее
Номер записи: 40
23-01-2020 дата публикации

GROUND NETWORK FOR END-TO-END BEAMFORMING

Номер: US20200028573A1
Автор: Buer Kenneth V., Cronin Christopher J., Miller Mark J.
Принадлежит: VIASAT, INC.

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. A method of providing a communication service to user terminals distributed over a user coverage area via an end-to-end relay comprising multiple return receive/transmit signal paths , the method comprising:receiving, at a plurality of access nodes at geographically distributed locations, respective return downlink signals from the end-to-end relay, each of the respective return downlink signals comprising return user data streams transmitted from a plurality of the user terminals and relayed by the end-to-end relay, to form a composite return signalidentifying a return beam weight matrix for end-to-end beamforming of transmissions from multiple return user beam coverage areas to the plurality of access nodes via the end-to-end relay;applying, to each of the respective composite return signals, respective beamforming weights of the return beam weight matrix to obtain a respective plurality of weighted composite return signals associated with each of the multiple return user beam coverage areas; andcombining, for the each of the multiple return user beam coverage ...

Подробнее
Номер записи: 41
23-01-2020 дата публикации

Ground-based beamformed communications using mutually synchronized spatially multiplexed feeder links

Номер: US20200028575A1
Автор: Charles Pateros, Kenneth Buer, William Ralston
Принадлежит: Viasat Inc

Embodiments provide ground-based beamforming with mutually synchronized spatially multiplexed gateways in a wireless communications system. Some embodiments operate in context of a satellite having a focused-beam feeder antenna that communicates with multiple, geographically distributed gateway terminals (e.g., single gateway per beam), and a user antenna that provides communications with user terminals via formed user beams. The gateway terminals can communicate feeder signals that are beam-weighted and mutually phase-synchronized (e.g., according to satellite and/or loopback beacons). For example, the synchronization can enable forward uplink signals to be phase-synchronously received by the satellite, and the beam weighting can enable the forward downlink signals to spatially combine to form forward user beams. Embodiments can achieve extensive bandwidth reuse through mutually synchronized spatial multiplexing of the feeder-link communications.

Подробнее
Номер записи: 42
23-01-2020 дата публикации

Dynamic Allocation Of Satellite Gateway Assignments

Номер: US20200028581A1
Автор: Gaske T. Paul
Принадлежит:

Arrangements for optimizing bandwidth of a satellite communication link are presented. A first satellite gateway system may transmit a first data set to a satellite to be relayed by the satellite to a first instance of user equipment. A second satellite gateway system may transmit a second data set to the satellite to be relayed by the satellite to a second instance of user equipment. A satellite gateway management system may determine that the second satellite gateway system has greater available bandwidth. The satellite gateway management system may route a third data set to be transmitted to the first instance of user equipment to the second satellite gateway system. The second satellite gateway system may transmit the third data set and beam steering data to the satellite, such that the satellite targets a downlink spot beam on the first instance of user equipment. 1. A method for optimizing bandwidth of a satellite communication link , the method comprising:transmitting, by a first satellite gateway system, a first data set to a satellite to be relayed by the satellite to a first instance of user equipment, wherein the first instance of user equipment is located within a first geographical region serviced by the first satellite gateway system; the second instance of user equipment is located within a second geographical region serviced by the second satellite gateway system;', 'the first satellite gateway system and the second satellite gateway system use a same frequency to transmit data to the satellite; and', 'the first satellite gateway system and the second satellite gateway system are geographically separated;', 'determining, by a satellite gateway management system, that the second satellite gateway system has greater available bandwidth than the first satellite gateway system;', 'routing, by the satellite gateway management system, a third data set to be transmitted to the first instance of user equipment to the second satellite gateway system;', the ...

Подробнее
Номер записи: 43
23-01-2020 дата публикации

ROBUST BEAM SWITCH SCHEDULING

Номер: US20200028582A1
Автор: "ONeill John Hai", Becker Donald W., Miller Mark J.
Принадлежит: VIASAT, INC.

Systems and methods are described for robust scheduling of beam switching patterns in satellite communications systems. Embodiments operate in context of a hub-spoke satellite communications architecture having a number of gateway terminals servicing large numbers of user terminals over a number of spot beams. The satellite includes switching subsystems that distribute capacity to the user beams from multiple of the gateway terminals in a shared manner according to a beam group switching pattern. The beam group switching pattern is robustly formulated to continue distributing capacity during gateway outages (e.g., when one or two gateway terminals are temporarily non-operational due to rain fade, equipment failure, etc.). For example, the beam group switching pattern can be formulated to minimize worst-case degradation of capacity across user beams, to prioritize certain beams or beam groups, etc. 1. (canceled)2. A satellite comprising:input subsystems configured to receive communications via a plurality of input beams;output subsystems configured to transmit the communications via a plurality of output beams; and for first time slots of a first frame, the beam group switching subsystem is to couple each one of the output subsystems with a corresponding one of the input subsystems according to a non-robust beam group switching pattern; and', 'for second time slots of a second frame, the beam group switching subsystem is to sequentially couple at least one of the output subsystems sequentially with two or more of the input subsystems according to a robust beam group switching pattern., 'a beam group switching subsystem configured to selectively couple any one of the input subsystems with any respective one of the output subsystems, such that3. The satellite of claim 2 , wherein:the plurality of input beams and the plurality of output beams are segregated into a plurality of beam groups, such that each beam group of the plurality of beam groups comprises a respective ...

Подробнее
Номер записи: 44
04-02-2016 дата публикации

High capacity satellite communications system

Номер: US20160036518A1
Автор: Adrian Morris, Dave Roos, Stanley Kay
Принадлежит: HUGHES NETWORK SYSTEMS LLC

A high capacity satellite communications system including a satellite with a beam for a forward downlink focused on a geographic area for which disproportionately higher capacity is desired, a hub located in a geographic area for which disproportionately lower capacity is desired, compared to the location of a VSAT, and the VSAT located in area where a beam for a forward downlink received by the VSAT from the satellite does not overlap with a beam for a return downlink received by the hub from a satellite.

Подробнее
Номер записи: 45
01-02-2018 дата публикации

End-to-end beamforming system

Номер: US20180034539A1
Автор: Kenneth V. Buer, Mark J. Miller
Принадлежит: Viasat Inc

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams.

Подробнее
Номер записи: 46
01-02-2018 дата публикации

GROUND NETWORK FOR END-TO-END BEAMFORMING

Номер: US20180034540A1
Автор: Buer Kenneth V., Cronin Christopher J., Miller Mark J.
Принадлежит:

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. A method of providing a communication service to user terminals distributed over a user coverage area via an end-to-end relay comprising multiple forward receive/transmit signal paths , the method comprising:obtaining multiple forward beam signals comprising forward user data streams for transmission to a plurality of the user terminals grouped by multiple forward user beam coverage areas;identifying a forward beam weight matrix for end-to-end beamforming of transmissions from a plurality of access nodes at geographically distributed locations to the multiple forward user beam coverage areas via the end-to-end relay;generating respective access node-specific forward signals for transmission by the plurality of access nodes, each of the respective access node-specific forward signals comprising a composite of respective forward beam signals weighted by respective forward beamforming weights of the forward beam weight matrix; andtransmitting respective forward uplink signals from the plurality of access nodes based on the respective access node-specific forward signals ...

Подробнее
Номер записи: 47
04-02-2021 дата публикации

A Method for Implementing Beam Hopping in a Satellite Communications Network

Номер: US20210036768A1
Автор: KESHET Arie, RAINISH Doron
Принадлежит:

A method is provided for conveying communications within a satellite communication network, by implementing a beam hopping technique for communicating with half-duplex user terminals. 1. A method for conveying communications within a satellite communication network , by implementing a beam hopping technique for communicating with half-duplex user terminals.2. The method of claim 1 , wherein said method comprises implementing a combination of full and sparse beam-hoping patterns.3. The method of claim 1 , wherein said method comprises exchanging communications between the satellite and the user terminals by offsetting ground footprint of transmit and receive beams.4. The method of claim 1 , comprising exchanging communications between the satellite and the user terminals while implementing a progressive time shifting between transmit and receive beam-hopping claim 1 , and wherein the progressive time shifting for a specific user terminal cell is a function of a distance extending between the nadir and said specific user terminal cell.5. The method of claim 1 , wherein a number of return channel beams implemented while exchanging communications between the satellite and the user terminals claim 1 , is higher than a number of forward channel beams.6. The method of claim 1 , further comprising a step of implementing a progressive phase shifting between transmit and receive cycles as a function of a distance extending between a cells' group and the satellite's nadir.7. The method of claim 1 , further comprising a step of implementing reduction of cycle time by misaligning forward- and return-channel beams. The present disclosure relates to the field of communications and in particularly to communications exchanged between satellite and terrestrial communication terminals/gateways.Communication satellites in Low Earth Orbit (LEO), circle the earth at a relatively low altitude from 500 to 1500 km. At these altitudes, the orbital period is in the order of 90 to 120 minutes ...

Подробнее
Номер записи: 48
04-02-2021 дата публикации

DEVICE AND METHOD FOR INSERTING QUADRUPLET AND DEVICE AND METHOD FOR EXTRACTING QUADRUPLET

Номер: US20210036773A1
Автор: BOUTTIER Arnaud, Ciochina Cristina, SIBEL Jean-Christophe
Принадлежит: Mitsubishi Electric Corporation

The invention relates to inserting reference signals in a radio signal to be transmitted over a wireless communication system, the radio signal being emitted according to a specific SS-STBC scheme, the method comprising, inserting the reference signals to transmit them in the radio signal such as samples of these reference signals are in specific positions in the SS-STBC symbol. 6. The method according to claim 1 , said method further comprising determining:{'sub': l', 'l, 'img': [{'@id': 'CUSTOM-CHARACTER-00129', '@he': '3.22mm', '@wi': '1.44mm', '@file': 'US20210036773A1-20210204-P00005.TIF', '@alt': 'custom-character', '@img-content': 'character', '@img-format': 'tif'}, {'@id': 'CUSTOM-CHARACTER-00130', '@he': '3.22mm', '@wi': '1.44mm', '@file': 'US20210036773A1-20210204-P00006.TIF', '@alt': 'custom-character', '@img-content': 'character', '@img-format': 'tif'}], 'claim-text': [{'br': None, 'i': k', 'k′', '=L,, 'sub': 1', 'H, '=1,'}, {'br': None, 'i': l∈', 'H−', 'k', ' Подробнее

Номер записи: 49
04-02-2021 дата публикации

POWER SAVING OF SMART REPEATERS WITH ATTACHED USER EQUIPMENT

Номер: US20210037457A1
Автор: ABEDINI Navid, Hormis Raju, Li Junyi, Sampath Ashwin
Принадлежит:

Methods, systems, and devices for wireless communications are described. A resource type associated with a transmission to be relayed by a wireless repeater may further be associated with a corresponding likelihood for subsequent forwarding activity (e.g., a corresponding likelihood a base station may send subsequent control information for configuring the wireless repeater to forward additional communications subsequent to the relayed transmission). Therefore, based on a resource type associated with a transmission configured by a wireless repeater configuration from a base station, a wireless repeater may efficiently configure a control interface, and control channel monitoring, subsequent to configured relay operations. 1. A method for wireless communication at a wireless repeater , comprising:receiving a repeater configuration from a base station;configuring repeater forwarding circuitry based at least in part on the repeater configuration;monitoring for a transmission based at least in part on the configured repeater forwarding circuitry; andtransitioning to a low power state based at least in part on a resource type indicated by the repeater configuration.2. The method of claim 1 , the transitioning comprising:transitioning to the low power state based at least in part on the resource type indicated by the repeater configuration being a first type of resources for the monitoring for the transmission.3. The method of claim 2 , the transitioning comprising:powering off the control interface.4. The method of claim 2 , wherein the first type of resources comprises one or more resources corresponding to a channel quality indicator transmission claim 2 , a precoding matrix indicator transmission claim 2 , a sounding reference signal transmission claim 2 , a channel state information reference signal transmission claim 2 , or a combination thereof.5. The method of claim 1 , further comprising:powering a control interface for a time duration prior to the transitioning ...

Подробнее
Номер записи: 50
08-02-2018 дата публикации

BEAMFORMER FOR END-TO-END BEAMFORMING COMMUNICATIONS SYSTEM

Номер: US20180041270A1
Автор: Buer Kenneth V., Cronin Christopher J., Miller Mark J.
Принадлежит:

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. A method of providing a communication service to user terminals distributed over multiple forward user beam coverage areas via an end-to-end relay comprising multiple forward receive/transmit signal paths , the method comprising:obtaining multiple forward beam signals comprising forward user data streams for transmission to a plurality of the user terminals grouped by the multiple forward user beam coverage areas;identifying a forward beam weight matrix for end-to-end beamforming of transmissions from a plurality of access nodes at geographically distributed locations to the multiple forward user beam coverage areas via the end-to-end relay;generating respective access node-specific forward signals for the plurality of access nodes, each of the respective access node-specific forward signals comprising a composite of respective forward beam signals weighted by respective forward beamforming weights of the forward beam weight matrix; anddistributing the respective access node-specific forward signals to the plurality of access nodes with respective forward ...

Подробнее
Номер записи: 51
24-02-2022 дата публикации

BEAM SUPER SURGE METHODS AND APPARATUS FOR SMALL GEOSTATIONARY (GEO) COMMUNICATION SATELLITES

Номер: US20220060251A1
Автор: Bily Adam, Ebadi Siamak, Gedmark John, Joseph Steve, Kummerer Robert, McLinko Ryan, Topalli Kagan
Принадлежит:

Disclosed embodiments relate satellites using a Software-Defined Radio (“SDR”) system. In one example, a geostationary (GEO) satellite includes an antenna system including multiple antennas, each configured to provide a spot beam having an adjustable throughput for a terrestrial coverage area while the antenna is in an active state and the satellite is in orbit above the Earth, a front-end subsystem communicatively coupled to the antenna system having an input side including an input filter and an analog-to-digital converter, and an output side including an output filter and a digital-to-analog converter, and a software defined radio (“SDR”) communicatively coupled to the antenna system via the front-end subsystem. The SDR, in response to a surge modification request, modifies a throughput of each active antenna by increasing or decreasing a share of a satellite power budget allotted to the antenna by deactivating or activating a previously active or previously inactive antenna, respectively. 1. A Geostationary (GEO) communication satellite comprising:an antenna system comprising a plurality of antennas, each of the antennas configured to provide a communication coverage region having an adjustable bandwidth for a terrestrial coverage area while the antenna is in an active state and the satellite is in an orbit above Earth;a front-end subsystem communicatively coupled to the antenna system, the front-end subsystem comprising an input side including an input filter and an analog-to-digital converter, and an output side including an output filter and a digital-to-analog converter; anda software defined radio (“SDR”), communicatively coupled to the antenna system via one or more user slices combined or split with the input side or the output side of the front-end subsystem, wherein each of one or more user slices are configured to communicate with one or more distinct gateway slices, wherein the SDR is configured to selectively increase or decrease the throughput of ...

Подробнее
Номер записи: 52
07-02-2019 дата публикации

FLEXIBLE PAYLOAD ARCHITECTURE FOR VHTS AND HTS APPLICATIONS

Номер: US20190044613A1
Автор: DESROUSSEAUX Eric, MAILLET Olivier, SCHREIDER Ludovic, VOISIN Philippe
Принадлежит:

A VHTS or HTS multibeam telecommunications payload includes a first multibeam antenna system with passive antennas, which is configured to receive from and transmit to spots of access stations GW respectively in a first satellite receive Rx band and a first satellite transmit Tx band, and a second multibeam antenna system with passive antennas, which is configured to receive from and transmit to a user coverage zone respectively in a second satellite receive Rx band and a second satellite transmit Tx band, by generating multiple satellite receive user spots and multiple satellite transmit user spots. The payload is wherein it comprises a digital core, based on a digital transparent processor DTP offering total connectivity and total flexibility of allocation of frequency slots to the access station and user spots, and associated with the DTP an RF switching set, made up of one or more matrices of RF switches on source accesses of user spots in satellite transmit Tx only or in satellite transmit Tx and in satellite receive Rx so as to implement operation by beam hopping on clusters Gj/G′j of Tx and/or Rx user spots for which the number of spots Rj/R′j is less than or equal to the total number P of access station spots. 1. A multibeam telecommunications payload for applications of very-high-throughput space telecommunications or of high-throughput space telecommunications comprising:a first multibeam antenna system of passive antennas, which is configured to receive from satellite receive Rx access station GW spots and transmit to satellite transmit Tx access station GW spots, respectively in a first satellite receive Rx band and a first satellite transmit Tx band; anda second multibeam antenna system of passive antennas, which is configured to receive from and transmit to a user coverage zone respectively in a second satellite receive Rx band and a second satellite transmit Tx band, by generating multiple satellite receive user spots and multiple satellite transmit ...

Подробнее
Номер записи: 53
18-02-2021 дата публикации

DYNAMIC SPATIAL ALLOCATION OF SATELLITE CAPACITY BASED ON MOBILE VESSEL LOAD FORECASTING

Номер: US20210050913A1
Автор: Peponides George M.
Принадлежит:

Methods, systems, and devices are described for providing dynamic spatial allocation of satellite capacity based on aircraft load forecasting. In embodiments, a satellite communications system provides network access service over a service area via a plurality of satellite user beams, predicts spatial network resource demand for the service area over one or more service periods based at least in part on forecasted travel paths of a plurality of mobile multi-user terminals over the one or more service periods and respective predicted service demands for the plurality of mobile multi-user terminals, determines a satellite capacity resource configuration for the plurality of satellite user beams for the one or more service periods based on the predicted spatial network resource demand, and then adapts at least one characteristic of the plurality of satellite user beams for the one or more service periods based on the determined satellite capacity resource configuration. 1. A method for allocating satellite capacity in a multi-beam satellite system , comprising:providing network access service over a service area via a plurality ofsatellite user beams according to a power budget;predicting spatial network resource demand for the service area over one or more service periods based at least in part on respective estimated service demands of a plurality of mobile multi-user terminals;determining a transmission power allocation of the power budget for the plurality of satellite user beams for the one or more service periods based on the spatial network resource demand; andadapting a transmission power of at least one of the plurality of satellite user beams for the one or more service periods based at least in part on the determined transmission power allocation.2. The method of claim 1 , wherein the adapting further comprises:reallocating transmission power of at least one of the plurality of satellite user beams having a lower predicted demand for the one or more service ...

Подробнее
Номер записи: 54
15-02-2018 дата публикации

METHOD AND APPARATUS FOR ESTABLISHING COMMUNICATIONS WITH A SATELLITE

Номер: US20180048382A1
Автор: Cummings Nathan, DiNallo Carlo
Принадлежит: Maxtena, Inc.

A mobile satellite radio equipped with a phased array antenna configures the phased array antenna in one or more non-directional operating modes in order to initially detect a signal from a communication satellite. Once a signal has been received from the satellite, frequency information determined in the course of operating in the one or more non-directional modes is used to configure the mobile satellite radio for operation in a subsequent stage when the phased array antenna is configured in a directional mode. In the subsequent stage the phased array antenna is used to scan a solid angle space to determine the direction of the satellite. Thereafter the antenna is used in the directional mode for satellite communication. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. A phased array antenna system comprising:an array of antenna elements for at least receiving a received signal;a controller for generating a phase control signal to scan a plurality of non-directional beam patterns; anda phase shifter array coupled to the array of antenna elements and the controller to establish a set of phase shifts that cause the array of antenna elements to exhibit a selected one of the plurality of non-directional beam patterns based on the phase control signal, wherein each of the plurality of non-directional beam patterns for the array of antenna elements has certain angular regions of weak gain that are stronger in at least one other non-directional beam pattern.9. The phased array antenna system according to claim 8 , wherein the set of phase shifts includes a first group of substantially equal phase shifts of a first value applied to a first group of antenna elements disposed at a center of the array of antenna elements claim 8 , a second group of substantially equal phase shifts of a second value applied to a second group of antenna elements disposed at corners of said array of antenna elements claim 8 , and a third group of ...

Подробнее
Номер записи: 55
03-03-2022 дата публикации

DYNAMIC LOAD BALANCING OF SATELLITE BEAMS

Номер: US20220070733A1
Автор: Montsma David J., Nesheim Marc A., Powers Paul J., Trudrung Erhard G.
Принадлежит:

A dynamic satellite load balancing system measures geographic position and travel information of in-flight aircraft in a fleet of aircraft equipped to establish in-flight connectivity services from a plurality of satellite beams. The in-flight aircraft include an on-board satellite map program with satellite map parameters to indicate which satellite beam of a group of available satellite beams is the most desirable based on the in-flight aircraft's geographic location. The system selects in-flight aircraft, determines load balanced satellite map parameters for the selected aircraft, and transmits the load balanced satellite map parameters to the aircraft to assemble load balanced satellite map programs to relieve wireless data communication saturation conditions on one or more of the satellite beams. The dynamic satellite load balancing system may transmit the load balanced satellite map parameters over an existing satellite data connection to make up-to-date adjustments to the communications load among the group of available satellite beams. 1. A method , comprising:projecting a balanced load among satellite data connections among a group of in-flight aircraft based on respective geographic locations of the group of in-flight aircraft, respective directions of the group of in-flight aircraft, and a set of distribution rules;based on the projected balanced load, determining a series of adjustments to a set of parameters impacting in-flight connectivity of the group of in-flight aircraft to a plurality of satellites; andtransmitting the series of adjustments to selected aircraft included in the group of in-flight aircraft over a time period to thereby continually supply load-balanced parameters to the group of in-flight aircraft corresponding to the balanced load during the time period.2. The method of claim 1 , wherein projecting the balanced load is further based on respective load levels of the plurality of satellites.3. The method of claim 2 ,further comprising ...

Подробнее
Номер записи: 56
25-02-2016 дата публикации

DEMULTIPLEXING APPARATUS, MULTIPLEXING APPARATUS, AND RELAY APPARATUS

Номер: US20160056883A1
Автор: Fujimura Akinori
Принадлежит: Mitsubishi Electric Corporation

A demultiplexing apparatus includes a signal receiving unit that receives signals, an analog demultiplexing unit that analog-demultiplexes, in predetermined units of channels, received signals received by the signal receiving unit and generates analog demultiplexed signals, and a plurality of digital demultiplexing units that digital-demultiplex the analog demultiplexed signals in units of sub-channels and generate digital demultiplexed signals. The analog demultiplexing unit controls, concerning the analog demultiplexed signals output to the digital demultiplexing units, a total value of bandwidths in which a signal is present so as to be a predetermined value or less. 1. A demultiplexing apparatus comprising:a signal receiving unit that receives signals;an analog demultiplexing unit that analog-demultiplexes, in predetermined units of channels, received signals received by the signal receiving unit and generates and outputs analog demultiplexed signals; anda plurality of digital demultiplexing units that digital-demultiplex, in units of sub-channels, the analog demultiplexed signals output from the analog demultiplexing unit and generate digital demultiplexed signals, whereinthe analog demultiplexing unit controls, concerning the analog demultiplexed signals output to the digital demultiplexing units, a total value of bandwidths in which a signal is present so as to be a predetermined value or less.2. The demultiplexing apparatus according to claim 1 , wherein the digital demultiplexing unit selects a signal in which a signal is present among the digital demultiplexed signals.3. The demultiplexing apparatus according to claim 1 , whereinthe signal receiving unit receives signals from a plurality of beam areas, and a beam selecting unit that selects signals received from one beam area out of the received signals from the beam areas; and', 'a synthesizer that extracts, in units of channels, a received signal of a specific channel among the received signals selected ...

Подробнее
Номер записи: 57
14-02-2019 дата публикации

SATELLITE FOR END-TO-END BEAMFORMING WITH NON-OVERLAPPING FEEDER AND USER FREQUENCIES

Номер: US20190052350A1
Автор: Buer Kenneth V., Miller Mark J.
Принадлежит: VIASAT, INC.

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. An apparatus for providing communications between a plurality of access nodes and a plurality of user terminals , the plurality of access nodes geographically distributed over an access node coverage area and the plurality of user terminals geographically distributed over a user coverage area , the apparatus comprising:means for receiving a plurality of first forward composite uplink signals and a plurality of second forward composite uplink signals, wherein each of the plurality of first forward composite uplink signals is a superposition of a first plurality of forward uplink signals transmitted by the plurality of access nodes over a first frequency range and each of the plurality of second forward composite uplink signals is a superposition of a second plurality of forward uplink signals transmitted by the plurality of access nodes over a second frequency range, and wherein the second frequency range is non-overlapping with the first frequency range;means for generating a plurality of forward downlink signals, each of the plurality of forward downlink signals ...

Подробнее
Номер записи: 58
14-02-2019 дата публикации

Multi-beam satellite communication system

Номер: US20190052351A1
Автор: Akinori Fujimura
Принадлежит: Mitsubishi Electric Corp

A relay side receiving unit (931) receives a relay signal (99), an analog relay unit (932) outputs by analog processing the relay signal (99) whose frequency bandwidth is controlled, and a digital relay unit (933) outputs by digital processing the relay signal (99) whose frequency bandwidth is controlled. A relay side transmitting unit (934) transmits the relay signal (99) output by the analog relay unit (932), the digital relay unit (933). A relay side control unit (935) controls the analog relay unit (932), the digital relay unit (933) in accordance with an analog relay unit control signal (941A), a digital relay unit control signal (941D) indicating a frequency band of the relay signal (99).

Подробнее
Номер записи: 59
14-02-2019 дата публикации

ROBUST BEAM SWITCH SCHEDULING

Номер: US20190052352A9
Автор: "ONeill John Hai", Becker Donald W., Miller Mark J.
Принадлежит:

Systems and methods are described for robust scheduling of beam switching patterns in satellite communications systems. Embodiments operate in context of a hub-spoke satellite communications architecture having a number of gateway terminals servicing large numbers of user terminals over a number of spot beams. The satellite includes switching subsystems that distribute capacity to the user beams from multiple of the gateway terminals in a shared manner according to a beam group switching pattern. The beam group switching pattern is robustly formulated to continue distributing capacity during gateway outages (e.g., when one or two gateway terminals are temporarily non-operational due to rain fade, equipment failure, etc.). For example, the beam group switching pattern can be formulated to minimize worst-case degradation of capacity across user beams, to prioritize certain beams or beam groups, etc. 132.-. (canceled)33. A method for robust sharing of gateway resources via a satellite comprising a plurality of input subsystems associated with a plurality of input beams , and comprising a plurality of output subsystems associated with a plurality of output beams , the satellite configured to sequentially couple the input subsystems with the output subsystems in each of a plurality of time slots of a frame according to a beam group switching pattern , the method comprising:receiving, by a core node, forward-link communications destined for a destination output beam of the plurality of output beams during the frame, wherein a destination output subsystem of the plurality of output subsystems is associated with the destination output beam;identifying, by the core node, multiple source input beams of the plurality of input beams that are associated with multiple input subsystems to be coupled with the destination output subsystem during the frame according to the beam group switching pattern, wherein each of the multiple input subsystems is to be coupled with the ...

Подробнее
Номер записи: 60
14-02-2019 дата публикации

METHOD FOR CORRECTING AN ERROR IN THE FREQUENCY GENERATION BY A TERMINAL OF A WIRELESS COMMUNICATION SYSTEM

Номер: US20190052497A1
Автор: PONSARD BENOIT
Принадлежит:

A method for correcting an error in the generation of a frequency by a frequency synthesizer of a terminal of a terrestrial wireless communication system. A query message is transmitted by the terminal. Error in the generation of the frequency of the query message is estimated by an access network as a function of a theoretical transmission frequency of the query message by the terminal and an actual frequency of reception of the query message by the access network. A response message comprising an item of correction information is transmitted by the access network. A frequency of reception by the terminal of a broadcast signal transmitted by the access network is generated by the frequency synthesizer of the terminal and as a function of the item of correction information received by the access network. 18-. (canceled)9. A method for correcting an error in generation of a frequency by a frequency synthesizer of a terminal of a terrestrial wireless communication system , the wireless communication system comprising an access network configured to exchange data with the terminal , comprising steps of:transmitting of a query message on a frequency generated by the frequency synthesizer to the access network by the terminal;estimating, by the access network, of the error in the generation of the frequency of the query message as a function of a theoretical transmission frequency of the query message by the terminal and an actual frequency of reception of the query message by the access network;transmitting a response message comprising an item of correction information of the estimated error to the terminal by the access network; andgenerating, by the frequency synthesizer of the terminal and as a function of the item of correction information received from the access network, a frequency of reception by the terminal of a broadcast signal transmitted by the access network.10. The method according to claim 9 , wherein claim 9 , as the theoretical transmission frequency ...

Подробнее
Номер записи: 61
25-02-2016 дата публикации

WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION CONTROL METHOD

Номер: US20160057698A1
Автор: AKITA Minoru, Fujimura Akinori
Принадлежит: Mitsubishi Electric Corporation

A wireless communication apparatus reducing power consumption of a large circuit size switch unit, includes a demultiplexing unit that separates an input multiplexed signal into plural signals for each input port, a prestage rearrangement unit that rearranges the plural signals input from the demultiplexing unit and outputs plural prestage rearranged signals for each input port, a switch unit that inputs the plural prestage rearranged signals output from the prestage rearrangement unit provided for each input port as plural signals before switching and applies switching processes to the plural signals before the switching to be output as plural switched signals for each output port, a poststage rearrangement unit that inputs and rearranges the plural switched signals output from the switch unit for each output port and outputs plural poststage rearranged signals for each output port, and a multiplexing unit that multiplexes the plural poststage rearranged signals for each output port. 113-. (canceled)14. A wireless communication apparatus including a plurality of input ports and a plurality of output ports , the wireless communication apparatus inputting , for each input port , an analog signal with a plurality of signals multiplexed thereon by a frequency division multiplexing method , the wireless communication apparatus comprising:an A/D converter that is provided for each input port and converts the analog signal that has been input to a digital signal;a demultiplexer that is provided for each input port, inputs the digital signal obtained by conversion by the A/D converter, and separates the digital signal that has been input into the plurality of signals;a prestage rearrangement circuit that is provided for each input port, inputs the plurality of signals from the demultiplexer, and rearranges channels of the plurality of signals that have been input to be output as a plurality of prestage rearranged signals;a switch circuit including a per-channel processing ...

Подробнее
Номер записи: 62
25-02-2021 дата публикации

RELAY STATION, CONTROL STATION, DATA TRANSMISSION SYSTEM, DATA TRANSMISSION METHOD, CONTROL CIRCUIT, AND RECORDING MEDIUM

Номер: US20210058138A1
Автор: MOTOYOSHI Katsuyuki, Tani Shigenori
Принадлежит: Mitsubishi Electric Corporation

A relay station includes a beam formation unit capable of emitting multiple beams to multiple respective emission areas. The beam formation unit forms clusters each from two or more of the emission areas, and emits the beams based on assignment information indicating which slot is assigned to which of the emission areas on a per cluster basis. One emission area belongs to multiple clusters. 1. A relay station comprising:a beam former capable of emitting a plurality of beams to a plurality of respective emission areas, the beam former forming clusters each from two or more of the emission areas and emitting the beams based on assignment information indicating which slot is assigned to which of the emission areas for each of the clusters, wherein one of the emission areas belongs to multiple ones of the clusters.2. The relay station according to claim 1 , wherein the clusters are arranged in a planar arrangement to constitute a coverage area.3. The relay station according to claim 2 , whereinthe coverage area is formed by use of the clusters each formed of the emission areas that are arranged along a line, andthe beams having frequencies different from each other or having polarized waves different from each other are used in the clusters.4. The relay station according to claim 1 , wherein the beam former emits the beams having polarized waves different from each other or having frequencies different from each other at a same time and to a same coordinate point.5. A control station comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a resource controller to perform assignment of a polarized wave and a frequency of a beam to be emitted by the relay station according to , and to make a determination of assignment of a slot to a cluster; and'}a transceiver to transmit, to the relay station, a center coordinate point to be irradiated with the beam and a null point of a beam pattern of the beam.6. The control station according to claim 5 , wherein the control ...

Подробнее
Номер записи: 63
25-02-2021 дата публикации

HUB COMMUNICATION WITH A SATELLITE NETWORK OR A TERRESTRIAL NETWORK

Номер: US20210058149A1
Автор: AGRAWAL Meghna, Beyene Yihenew Dagne, Lewis Vijay, Noah Moshe, Nuttall Andrew, Ruttik Kalle, Winata Barry
Принадлежит: Skylo Technologies, Inc.

Apparatuses, methods, and systems of hub communication with a satellite network or a terrestrial network are disclosed. One method includes detecting presence of the satellite network, detecting, by the hub, presence of a terrestrial network, selecting to connect to one of the satellite network or the terrestrial network based on a priority ruleset, estimating a propagation delay between the hub and a base station of the satellite network when the satellite network is selected, adjusting a timing offset between transmit and receive radio frames at the hub based on whether the satellite network or the terrestrial network is selected, and based at least on the propagation delay and a fixed frame offset between uplink and downlink frames at base station, and communicating with the base station of the satellite network or a base station of the terrestrial network. 1. A method , comprising:detecting, by a hub, presence of a satellite network;detecting, by the hub, presence of a terrestrial network;selecting, by the hub, to connect to one of the satellite network or the terrestrial network based on a priority ruleset;estimating a propagation delay between the hub and a base station of the satellite network when the satellite network is selected;adjusting, by the hub, a timing offset between transmit and receive radio frames at the hub based on whether the satellite network or the terrestrial network is selected, and based at least on the propagation delay and a fixed frame offset between uplink and downlink frames at base station; andcommunicating, by the hub, with the base station of the satellite network when the satellite network is selected, and with a base station of the terrestrial network when the terrestrial network is selected.2. The method of claim 1 , further comprising broadcasting claim 1 , by the base station claim 1 , the fixed frame offset over the satellite network.3. The method of claim 1 , further comprising selecting the adjusted timing offset between ...

Подробнее
Номер записи: 64
23-02-2017 дата публикации

BEAM FORMING AND POINTING IN A NETWORK OF UNMANNED AERIAL VEHICLES (UAVS) FOR BROADBAND ACCESS

Номер: US20170054489A1
Автор: Jalali Ahmad, Schiff Leonard
Принадлежит:

Systems and methods configured to form and point beams from one or more unmanned aerial vehicles (UAVs) toward a target coverage area on the ground. One embodiment describes dividing the target coverage area on the ground among multiple UAVs when each UAV antenna system generates static beams. Another embodiment describes dividing the target coverage area on the ground among multiple UAVs when their antenna systems are capable of dynamically steering their respective beams. Another set of embodiments describe systems and method to allow multiple UAVs to provide service in the same area on the ground using the same spectrum. 119.-. (canceled)20. A method of relaying Internet traffic via an unmanned aerial vehicle (UAV) , the method comprising:associating each of a plurality of ground terminals to respective ones of a plurality of cells;receiving data at the UAV from a gateway apparatus, the gateway apparatus being in data communication with an Internet; andtransmitting a beam comprising at least a portion of the received data to the plurality of cells, the associated ones of the plurality of ground terminals being in data communication with the UAV;where adjacent ones of the plurality of cells receive the beam at different frequencies.21. The method of claim 20 , where the UAV and at least one ground terminal of the plurality of ground terminals comprise antenna sub-systems that are comprised of two antenna polarizations.22. The method of claim 21 , where the two antenna polarizations comprise vertical and horizontal linear polarizations.23. The method of claim 21 , where the two antenna polarizations comprise left and right circular polarizations.24. The method of claim 21 , where both the UAV and the at least one ground terminal comprise two transmitter and two receiver chains claim 21 , and where each of the transmitter and receiver chains are connected to one of the two antenna polarizations.25. The method of claim 24 , where the UAV and the at least one ground ...

Подробнее
Номер записи: 65
14-02-2019 дата публикации

Flexible bandwidth assignment to spot beams

Номер: US20190053214A1
Автор: Hampton Chan
Принадлежит: Space Systems Loral LLC

A wireless communication platform utilizes flexible bandwidth assignment to re-allocate bandwidth between spot beams. The platform may assign a first combination of frequency and polarization (FP) to a first spot beam and a second combination of frequency and polarization to a second spot beam that is adjacent and at least partially overlapping the first spot beam. The platform may assign to the first spot beam a reserved combination of frequency and polarization during a first time period, and at second time, assign the reserved combination to the second spot beam. The platform may also assign the reserved combination simultaneously to adjacent spot beams by managing user of the reserved combination by geographically isolated terminals in the spot beams. The platform may further assign different portions of the reserved combination to adjacent spot beams without geographical limitations.

Подробнее
Номер записи: 66
13-02-2020 дата публикации

SYSTEMS AND METHODS FOR INCREASING CAPACITY IN A REDUNDANCY NETWORK

Номер: US20200052781A1
Автор: Kroening Adam M.
Принадлежит:

A redundancy network is coupled to a first plurality of signal components and to a beam hopping network. The redundancy network has redundancy network signal junctions configurable to define redundancy network signal paths through the redundancy network, with one path for each signal component. The beam hopping network has beam hopping junctions configurable to define beam hopping signals paths from the redundancy network to other signal components. The beam hopping junctions are dynamically adjustable to reconfigure the beam hopping signals paths so signals from the redundancy network are deliverable to at least two of the other signal components. The redundancy network signal junctions are reconfigurable in response to a failure of one of the first signal components to redefine the redundancy network signal paths so that signals from the remaining first signal components are distributable, by the beam hopping network, to all of the other signal components. 1. A switch network system comprising:a redundancy network comprising a plurality of redundancy signal transfer paths configured to be communicably coupled to a first plurality of signal components, the redundancy network comprising a plurality of redundancy network signal junctions; anda beam hopping network comprising a plurality of beam hopping signal transfer paths configured to be communicably coupled to a second plurality of signal components and to a plurality of intermediate signal transfer paths communicably coupled to the redundancy network, the beam hopping network further comprising a plurality of beam hopping junctions configurable to define beam hopping signals paths between the intermediate signal transfer paths and the beam hopping signal transfer paths;whereinthe plurality of redundancy network signal junctions are configurable to define a plurality of redundancy network signal paths between the redundancy signal transfer paths and the intermediate signal transfer paths whereby each redundancy ...

Подробнее
Номер записи: 67
23-02-2017 дата публикации

Wireless communications system and method

Номер: US20170055252A1
Автор: Paul William Piggin, Timothy James Speight
Принадлежит: SCA IPLA Holdings Inc

A wireless communications system includes a base station, a relay device, and a terminal device. The terminal device can transmit one or more first type access request messages to request uplink resources from the base station, and if no response to the first type access request messages is received from the base station, can transmit a second type access request message. The base station is responsive to a first type access request message received from the terminal device to transmit an allocation of uplink resources to the terminal device. The relay device is responsive to a second type access request message received from the terminal device to transmit a relayed access request message to request the base station to allocate uplink resources to the terminal device. The base station is responsive to the relayed access request message to transmit an allocation of uplink resources to the terminal device.

Подробнее
Номер записи: 68
20-02-2020 дата публикации

Approaches for achieving improved capacity plans for a satellite communications system via interleaved beams from multiple satellites

Номер: US20200059297A1
Автор: Adrian Morris, Dave Roos, Stan Kay
Принадлежит: HUGHES NETWORK SYSTEMS LLC

A method is provided for interleaving frequency reuse plans of multiple satellites to form an aggregate frequency reuse cell plan. A first plurality of spot beams is generated by a first satellite for a first frequency reuse plan based on radio frequency (RF) spectrum bands. A second plurality of spot beams is generated by a second satellite for a second frequency reuse plan based on the RF spectrum bands. The first and second plurality of spot beams are interleaved to generate an aggregate frequency reuse cell plan. According to the aggregate frequency reuse plan, each of a first plurality of cells is covered by a combination of at least two of the plurality of spot beams of the first satellite, and each of a first plurality of cells is covered by a combination of at least two of the plurality of spot beams of the second satellite.

Подробнее
Номер записи: 69
02-03-2017 дата публикации

BEAM FORMING AND POINTING IN A NETWORK OF UNMANNED AERIAL VEHICLES (UAVS) FOR BROADBAND ACCESS

Номер: US20170063443A1
Автор: Jalali Ahmad, Schiff Leonard
Принадлежит:

Systems and methods configured to form and point beams from one or more unmanned aerial vehicles (UAVs) toward a target coverage area on the ground. One embodiment describes dividing the target coverage area on the ground among multiple UAVs when each UAV antenna system generates static beams. Another embodiment describes dividing the target coverage area on the ground among multiple UAVs when their antenna systems are capable of dynamically steering their respective beams. Another set of embodiments describe systems and method to allow multiple UAVs to provide service in the same area on the ground using the same spectrum. 111.-. (canceled)12. A ground terminal apparatus , comprising:a terminal antenna fixture configured to form a first beam toward one or more unmanned aerial vehicle (UAV), the terminal antenna fixture configured to steer the first beam thereof to track a position of the one or more UAV as the one or more UAV maintains one or more corresponding orbits;a plurality of radio transmitters configured to transmit a first signal to the one or more UAV; anda plurality of receivers configured to receive a second signal from the one or more UAV.13. The ground terminal apparatus of claim 12 , where at least a first and a second UAV of the one or more UAV share a frequency band.14. The ground terminal apparatus of claim 13 , where the at least first and second UAV are configured to maintain a minimum distance of separation.15. The ground terminal apparatus of claim 14 , where:the terminal antenna fixture comprises a directional antenna, the steering comprising pointing a beam thereof toward a position of the first UAV.16. The ground terminal apparatus of claim 15 , where:the minimum distance of separation is determined based on a minimum specified value of a ratio of a received signal from the first UAV to a sum of interfering signals received from the second UAV.17. The ground terminal apparatus of claim 12 , further comprising a network interface configured ...

Подробнее
Номер записи: 70
08-03-2018 дата публикации

DUAL-BAND COMMUNICATION SATELLITE SYSTEM AND METHOD

Номер: US20180069621A1
Автор: CHAN Man Hei, HU Hai, LEUNG Harry Yin Chung, TONG Roger Shun Hong, VONG Fred Chun Yin, YIP Kat Fan
Принадлежит:

Dual-band satellite communication systems and methods are described. A dual-band satellite communication system is described with an array of feeds. The array includes single band feeds and one or more multi-band feeds. The multi-band feeds provide dual-band spot beams. Dual-band spot beams include a first frequency band spot beam and a second frequency band spot beam. A spot beam layout may be provided when a shared reflector for the array of feeds is provided. The first frequency band beamwidth may be smaller than a second frequency band beamwidth and the number of multi-band feeds in the array of feeds may be less than the number of single band feeds. 1. A satellite system for providing dual-band satellite coverage using a spot beam layout for a satellite coverage perimeter , the system comprising: a plurality of single band feeds, the single band feeds generating first frequency band spot beams, and', 'one or more multi-band feeds each generating a first frequency band spot beam and a second frequency band spot beam concentric with the first frequency band spot beam, the first frequency band spot beam having a different beamwidth than the second frequency band spot beam,', 'wherein the number of multi-band feeds is different than the number of single band feeds; and, 'an array of feeds, the array includinga shared reflector for the array of feeds.2. The system of claim 1 , wherein the shared reflector is for at least one single band feed and at least one multi-band feed.3. The system of claim 1 , wherein the shared reflector is for each of the plurality of single band feeds and for each of the one or more multi-band feeds in the array of feeds.4. The system of claim 1 , wherein the system includes two or more shared reflectors claim 1 , and wherein each shared reflector is the same size as another shared reflector in the two or more shared reflectors claim 1 , and wherein a first shared reflector is for the plurality of single band feeds and a second shared ...

Подробнее
Номер записи: 71
27-02-2020 дата публикации

ACTIVE REPEATER DEVICE FOR OPERATIONAL MODE BASED BEAM PATTERN CHANGES FOR COMMUNICATION WITH A PLURALITY OF USER EQUIPMENT

Номер: US20200067593A1
Автор: Boers Michael, Gharavi Sam, Rofougaran Ahmadreza, Rofougaran Maryam, SHIN Donghyup, SHIRINFAR Farid, Sridharan Kartik, WU Stephen, Yoon Seunghwan
Принадлежит:

An active repeater device includes a primary sector and at least a secondary sector communicatively coupled to the primary sector receives or transmits a first beam of input RF signals having a first beam pattern from or to a base station, respectively. The primary sector includes an baseband signal processor and a first radio head (RH) unit. The secondary sector comprises a second RH unit. The first beam pattern covers a first geographical area. Beamforming coefficients are generated to convert the first beam pattern of the first beam of input RF signals to a second beam pattern. A second beam of output RF signals in the second beam pattern is transmitted from or received by, respectively, the secondary sector to or from, respectively, a plurality of user equipment (UEs) based on the generated beamforming coefficients and the received first beam of input RF signals. 1. A communication device , comprising: a first antenna array of the first RH unit is configured to receive a first beam of first input RF signals associated with a first beam pattern from a base station, or transmit the first beam of the first input RF signals associated with the first beam pattern to the base station,', 'a controller of the baseband signal processor is configured to generate beamforming coefficients to convert the first beam pattern of the first beam of the first input RF signals to a second beam pattern based on a first operating mode, of a plurality of operating modes; and, 'a primary sector that includes a baseband signal processor and a first radio head (RH) unit, wherein'} a second antenna array of the second RH unit is configured to recieve a second beam of output RF signals in the second beam pattern to a plurality of user equipment (UEs) or transmit the second beam of the output RF signals in the second beam pattern to the plurality of UEs, based on the generated beamforming coefficients in the first operating mode and the received first beam of the first input RF signals,', ' ...

Подробнее
Номер записи: 72
11-03-2021 дата публикации

TWO-HOP WIRELESS NETWORK COMMUNICATION

Номер: US20210076293A1
Автор: Aquilano Gina, Doherty Lance Robert, LUSHIN Aleksandr, Simon Jonathan Noah
Принадлежит:

A system and method for providing multiple modes of communication in wireless networks includes a network manager and a plurality of network nodes. The plurality of network nodes form a wireless network with the network manager and are configured to communicate data to the network manager using respective communication links having a first bandwidth. The plurality of network nodes are further configured to transition to a two-hop mode of communication upon one or more failures in communication to the network manager. While in the two-hop mode of communication, a respective network node of the plurality of nodes is configured to transmit node data to at least one other network node over a communication link having a second bandwidth different than the first bandwidth. The other network nodes are configured to listen for communication from the respective network node and re-transmit to the network manager the node data received from the respective network node. 1. A method of providing multiple modes of communication in wireless networks , the method comprising:communicating data from a plurality of network nodes to a network manager using respective communication links having a first bandwidth, the plurality of network nodes and the network manager forming a wireless network;transitioning to a two-hop mode of communication for a respective network node of the plurality of nodes, wherein other respective network nodes amongst the plurality of network nodes are configured to listen for communication from the respective network node;transmitting node data from the respective network node to at least one of the other network nodes over a communication link having a second bandwidth different than the first bandwidth; andre-transmitting to the network manager, by the at least one of the other network nodes, the node data received from the respective network node.2. The method of claim 1 , wherein transitioning to the two-hop mode of communication for the respective ...

Подробнее
Номер записи: 73
15-03-2018 дата публикации

Reconfigurable RF front end circuit for a multi-beam array fed reflector antenna system

Номер: US20180076519A1
Автор: Angeletti Piero, Coromina Francesc, Gabellini Piero, Gatti Nicola
Принадлежит: European Space Agency (ESA)

Reconfigurable RF front-end circuit for a multi-beam array fed reflector antenna system having a first plurality of Ninput beam signals and a second plurality of Nradiating elements (RE), and method of operating such a front-end circuit. 1. A reconfigurable RF front-end circuit for a multi-beam array fed reflector antenna system having a first plurality of NB input beam signals and a second plurality of NE radiating elements (RE) , the front-end circuit comprising a reconfigurable beam forming network (LLRBFN) , having a set of NB input ports and distributing each input port signal to a plurality of NA output ports with phase and amplitude control; a plurality of NA high power amplifiers (HPA) connected to the plurality of NA output ports of the reconfigurable beam forming network (LLRBFN); an output network (ONET , OSN) , arranged for recombining signals output by the high power amplifiers (HPA) and feeding the recombined signals to the second plurality of NE radiating elements (RE) ,wherein the high power amplifiers (HPA) are variable bias high power amplifiers (VB-HPA).2. The reconfigurable RF front-end circuit according to claim 1 , wherein the variable bias high power amplifier (VB-HPA) is a flexible solid-state power amplifier (flex-SSPA).3. The reconfigurable RF front-end circuit according to claim 1 , wherein the variable bias high power amplifier (VB-HPA) is a variable bias travelling wave tube amplifier (flex-TWTA).4. The reconfigurable RF front-end circuit according to claim 1 , further comprising a set of channel amplifiers (CA) each connected to one of the set of NB input ports of the reconfigurable beam forming network (LLRBFN).5. The reconfigurable RF front-end circuit according to claim 1 , wherein the reconfigurable beam forming network (LLRBFN) comprises a plurality of signal dividers (SD) for distributing each input port signal to a plurality of NA signal channels claim 1 , each signal channel further comprising a phase weighting element (WE PHI) ...

Подробнее
Номер записи: 74
15-03-2018 дата публикации

HYBRID BEAMFORMING MULTI-ANTENNA WIRELESS SYSTEMS

Номер: US20180076881A1
Автор: Li Boyu, Liang Ping, Zhu Dengkui
Принадлежит: RF DSP Inc.

This invention presents methods for MU-MIMO wireless communication systems comprising a BS with plural of antennas placed as a linear array or planar array, plural of UEs, for conducting two-level signal processing at the BS to reduce the system implementation complexity, i.e., the RF precoding/combination and the baseband precoding/detection, for the BS to obtain the second-order statistical information of the channel matrix of each UE to computing the RF precoding matrix through a much smaller number of pilots than that of the transceiving antennas at the BS, where the second-order statistical information of the channel matrix can be obtained through the uplink reference signals or downlink reference signals plus uplink feedback. 1. A MU-MIMO TDD wireless communication system comprising a BS with plural of antennas where the number of RF chains is smaller than the number of antennas; the BS acquiring CSI by each UE transmitting uplink pilot; the BS computing a first level unified analog beamforming matrix for RF processing; and the BS computing a second level matrix for baseband processing.2. The system in further comprising that the first level matrix is used to couple the RF chains and the physical antennas of the BS.3. The system in further comprising that the second level matrix is used to couple the output of the modulation module and the RF chains of the BS.4. The system in further comprising the UEs served by the BS transmitting pilot signal or reference signal information in the uplink channel for BS CSI acquisition to compute the first level matrix claim 1 , and the BS sampling the received signals along the antenna dimension so that the number of signals passed to the RF chain is no larger than the number of RF chains N.5. The system in further comprising that the sampling is implemented by selecting the signals from part of the receiving antennas when the antennas at the BS are placed as a linear array.6. The system in further comprising that the ...

Подробнее
Номер записи: 75
07-03-2019 дата публикации

Communication terminal apparatus, terrestrial cellular base station and mobile communication system

Номер: US20190075468A1
Автор: Teruya Fujii
Принадлежит: SoftBank Corp

A communication terminal apparatus, a terrestrial cellular base station and a mobile communication system are provided, which are capable of being shared in a terrestrial cellular mobile communication system and a satellite mobile communication system, preventing an interference between both systems and improving a spectral efficiency in a downlink of the terrestrial cellular mobile communication system, by simple switching control of radio resources. When the communication terminal apparatus is located in an area of the terrestrial cellular mobile communication system, all of time slots allocated to the terrestrial cellular mobile communication system and at least a part of time slots allocated to the satellite mobile communication system are used in a downlink, and all of time slots allocated to the terrestrial cellular mobile communication system are used and time slots allocated to the satellite mobile communication system are not used in an uplink.

Подробнее
Номер записи: 76
05-03-2020 дата публикации

HIGH-THROUGHPUT SATELLITE WITH SPARSE FIXED USER BEAM COVERAGE

Номер: US20200076497A1
Автор: Agarwal Anil, Burdick Clifford, Hudson Erwin, Martin Remberto
Принадлежит:

Embodiments provide high-throughput, hub-and-spoke satellite communications with geographically non-overlapping user beams and full frequency reuse. For example, a coverage area of a satellite is segmented into multiple candidate coverage zones, and an associated consumption demand is determined for each candidate coverage zone. Fixed spot beams are assigned to a subset of the candidate coverage zones according to highest associated consumption demands, such that each fixed spot beam corresponds to at least one candidate coverage zone to service an associated beam coverage area that is geographically non-overlapping with beam coverage areas of all other fixed spot beams, and each fixed spot beam is allocated full use of a same spectrum. One or more steerable beams selectively cover lower consumption demand zones. 1. A method for providing satellite communications services in geographically non-overlapping beam coverage areas , the method comprising:segmenting a coverage area of a geostationary satellite into a plurality of candidate coverage zones;determining a consumption demand associated with each of the plurality of candidate coverage zones;assigning a plurality of fixed spot beams of the geostationary satellite to a first subset of the plurality of candidate coverage zones according to highest associated consumption demands,such that each fixed spot beam of the plurality of fixed spot beams corresponds to at least one candidate coverage zone of the first subset to service an associated user beam coverage area that is geographically non-overlapping with user beam coverage areas of all other fixed spot beams of the plurality of fixed spot beams,such that each fixed spot beam of the plurality of fixed spot beams is allocated full use of a same user-link spectrum; andassigning a steerable spot beam to selectively cover a second subset of the plurality of candidate coverage zones.2. The method of claim 1 , wherein the assigning the plurality of fixed spot beams is ...

Подробнее
Номер записи: 77
05-03-2020 дата публикации

Forward and reverse calibration for ground-based beamforming

Номер: US20200076498A1
Автор: Soheil Sayegh
Принадлежит: Viasat Inc

Methods and systems for calibrating the return and forward links of a satellite communication system are provided according to embodiments of the invention. The phase and/or amplitude variations caused by the return and forward links are calculated and/or estimated to aid in beamforming, such as ground-based beamforming. Calibration earth stations, distributed within one or more beam patterns, may be used to transmit calibration codes to the gateway to calibrate the return link. Return links variations may be estimated using a weighted minimum mean square algorithm at the gateway. Forward links may be calibrated with calibration codes transmitted from the gateway through a hybrid matrix to at least one calibration station. Forward calibration links may also calibrate for temperature-dependent signal variations such as diplexer variations at the satellite.

Подробнее
Номер записи: 78
24-03-2016 дата публикации

FORWARD AND REVERSE CALIBRATION FOR GROUND-BASED BEAMFORMING

Номер: US20160087714A1
Автор: Sayegh Soheil
Принадлежит:

Methods and systems for calibrating the return and forward links of a satellite communication system are provided according to embodiments of the invention. The phase and/or amplitude variations caused by the return and forward links are calculated and/or estimated to aid in beamforming, such as ground-based beamforming. Calibration earth stations, distributed within one or more beam patterns, may be used to transmit calibration codes to the gateway to calibrate the return link. Return links variations may be estimated using a weighted minimum mean square algorithm at the gateway. Forward links may be calibrated with calibration codes transmitted from the gateway through a hybrid matrix to at least one calibration station. Forward calibration links may also calibrate for temperature-dependent signal variations such as diplexer variations at the satellite. 17-. (canceled)8. A method , comprising:transmitting a plurality of orthogonal codes via a plurality of gateways to a satellite having a plurality of satellite feeds, wherein the satellite receives the plurality of orthogonal codes with the plurality of satellite feeds and transmits linear combinations of the plurality of orthogonal codes to a plurality of calibration stations via the plurality of satellite feeds; anddetermining beamforming parameters for forward link transmissions from the plurality of gateways to a plurality of spot beams via the satellite based on comparisons of the plurality of orthogonal codes received at the plurality of calibration stations in the linear combinations with the originally transmitted plurality of orthogonal codes.9. The method of claim 8 , further comprising:receiving signaling from the plurality of calibration stations comprising the plurality of orthogonal codes received at the plurality of calibration stations;correlating the plurality of orthogonal codes received at the plurality of calibration stations in the linear combinations with the originally transmitted plurality ...

Подробнее
Номер записи: 79
31-03-2022 дата публикации

PROGRAMMABLE SMART REPEATER WITH IN-BAND CONTROL

Номер: US20220103247A1
Автор: ABEDINI Navid, Chen Wanshi, Li Junyi, Luo Tao
Принадлежит:

Apparatus, methods, and computer-readable media for facilitating a programmable smart repeater with in-band control are disclosed herein. An example method for wireless communication at a repeater includes establishing a control link with a control node and receiving, via the control link, a configuration of one or more parameters of the repeater to forward communication between a first wireless device and a second wireless device. The example method also includes transitioning an MT component of the repeater to a power saving mode for at least a period of time after receiving the configuration and forwarding the communication between the first wireless device and the second wireless device based on the one or more parameters in the configuration. The disclosed techniques may enable reduction in control signaling between the control node and the repeater to provide power savings for the MT of the repeater and lower signal overhead for the control node. 1. An apparatus for wireless communication at a repeater , comprising:a memory; and establish a control link with a control node;', 'receive, via the control link, a configuration of one or more parameters of the repeater to forward communication between a first wireless device and a second wireless device;', 'transition a mobile termination (MT) component of the repeater to a power saving mode for at least a period of time after receiving the configuration; and', 'forward the communication between the first wireless device and the second wireless device based on the one or more parameters in the configuration., 'at least one processor coupled to the memory, the memory and the at least one processor configured to2. The apparatus of claim 1 , wherein the one or more parameters includes at least one of:a beamforming configuration,a time division duplex (TDD) pattern,a transmission power configuration,a bandwidth configuration, ora power saving configuration.3. The apparatus of claim 1 , wherein the configuration ...

Подробнее
Номер записи: 80
21-03-2019 дата публикации

SIGNAL BOOSTER WITH SPECTRALLY ADJACENT BANDS

Номер: US20190089452A1
Автор: Ashworth Christopher Ken
Принадлежит:

Technology for a signal booster is disclosed. The signal booster can include a first quadplexer. The signal booster can include a second quadplexer. The signal booster can include one or more first-direction signal paths communicatively coupled between the first quadplexer and the second quadplexer. At least one of the one or more first-direction signal paths can be configured to amplify and filter signals in two or more spectrally adjacent bands. The signal booster can include one or more second-direction signal paths communicatively coupled between the first quadplexer and the second quadplexer. At least one of the one or more second-direction signal paths can be configured to amplify and filter signals in two or more spectrally adjacent bands. 1. A repeater , comprising:a first quadplexer;a second quadplexer;one or more first-direction signal paths communicatively coupled between the first quadplexer and the second quadplexer, wherein at least one of the one or more first-direction signal paths are configured to amplify and filter signals in two or more spectrally adjacent bands; andone or more second-direction signal paths communicatively coupled between the first quadplexer and the second quadplexer, wherein at least one of the one or more second-direction signal paths are configured to amplify and filter signals in two or more spectrally adjacent bands.2. The repeater of claim 1 , wherein the one or more first-direction signal paths includes:a first-direction band 12 (B12) and a first-direction band 71 (B71) combined signal path; anda first-direction band 13 (B13) signal path.3. The repeater of claim 1 , wherein the one or more first-direction signal paths includes:a first-direction band 12 (B12) and a first-direction band 71 (B71) combined signal path; anda first-direction band 13 (B13) and band 14 (B14) combined signal path.4. The repeater of claim 1 , wherein the one or more second-direction signal paths includes:a second-direction band 12 (B12) and band 13 ...

Подробнее
Номер записи: 81
26-06-2014 дата публикации

Bonded pseudo hemispherical beam operation for spot beam environments

Номер: US20140177520A1
Автор: Michael Beeler, Tiberiu Artzi, Wallace Davis
Принадлежит: Comtech EF Data Corp

A method of creating a pseudo hemispherical beam using a plurality of individual spot beams comprising receiving by a single router or packet processor, user data from a plurality of users, processing the user data by the single router or packet processor using a QoS logic such that a single output comprising a plurality of queues of data results, each queue of data comprising data designated for transmission only to one or more predetermined remote receivers, modulating the plurality of queues of data received using a multiple-carrier modulator such that a single output comprising a plurality of individual spot beams results, wherein each individual spot beam has a unique center frequency and carrier signal configuration, and transmitting the plurality of individual spot beams to a repeating relay configured to transmit each individual spot beam to the one or more predetermined remote receivers.

Подробнее
Номер записи: 82
19-03-2020 дата публикации

ACTIVE REPEATER DEVICE SHARED BY MULTIPLE SERVICE PROVIDERS TO FACILITATE COMMUNICATION WITH CUSTOMER PREMISES EQUIPMENT

Номер: US20200091992A1
Автор: Boers Michael, Gharavi Sam, Rofougaran Ahmadreza, Rofougaran Maryam, SHIN Donghyup, SHIRINFAR Farid, Sridharan Kartik, WU Stephen, Yoon Seunghwan
Принадлежит:

An active repeater device including a first antenna array, a controller, and one or more secondary sectors receives or transmits a first beam of input RF signals from or to, respectively, a first base station operated by a first service provider and a second beam of input RF signals from or to, respectively, a second base station operated by a second service provider. A controller assigns a first beam setting to a first group of customer premises equipment (CPEs) and a second beam setting to a second group of CPEs, based on one or more corresponding signal parameters associated with the each corresponding group of CPEs. A second antenna array of the second RH unit concurrently transmits or received a first beam of output RF signals to or from the first group of CPEs and a second beam of output RF signals to the second group of CPEs. 1. An active repeater device , comprising: a first antenna array of the first RH unit is configured to receive a first beam of input RF signals from a first base station operated by a first service provider and a second beam of input RF signals from a second base station operated by a second service provider or transmit the first beam of input RF signals to the first base station and the second beam of input RF signals to the second base station;', 'a controller of the baseband signal processor is configured to assign a first beam setting from a plurality of beam settings to a first group of customer premises equipment (CPEs) of a plurality of groups of CPEs and a second beam setting from the plurality of beam settings to a second group of CPEs of the plurality of groups of CPEs,', 'wherein the first beam setting is different than the second beam setting; and, 'a primary sector that includes a baseband signal processor and a first radio head (RH) unit, wherein'} a second antenna array of the second RH unit is configured to concurrently transmit a first beam of output RF signals to the first group of CPEs associated with the first service ...

Подробнее
Номер записи: 83
19-03-2020 дата публикации

Ground Terminals via Remote Digital-Beam-Forming Networks for Satellites in Non-Geostationary Orbit

Номер: US20200091997A1
Автор: Donald C.D. Chang, Juo-Yu Lee, Steve K. Chen
Принадлежит: Spatial Digital Systems Inc

A MIMO basestation for a cellular communications system comprises a remote indoor processing facility coupled to an outdoor RF tower via optical fibers. The remote indoor processing facility includes a bank of RF modulators to modulate signal streams; a remote MIMO transmitting processor that includes a remote digital beam-forming network to transform the modulated signal streams into transmit beam signals; a pre-processor to perform a wavefront multiplexing transform on the transmit beam signals to generate wavefront multiplexed beam signals, each of the wavefront multiplexed beam signals being a linear combination of the transmit beam signals; and RF-to-optical drivers to perform optical modulating functions on the wavefront multiplexed beam signals to generate optical waveform streams.

Подробнее
Номер записи: 84
19-03-2020 дата публикации

BEAMFORMER FOR END-TO-END BEAMFORMING COMMUNICATIONS SYSTEM

Номер: US20200091998A9
Автор: Buer Kenneth V., Cronin Christopher J., Miller Mark J.
Принадлежит: VIASAT, INC.

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. An apparatus for providing a communication service to user terminals distributed over multiple forward user beam coverage areas via an end-to-end relay comprising multiple forward receive/transmit signal paths , comprising:means for obtaining multiple forward beam signals comprising forward user data streams for transmission to a plurality of the user terminals grouped by the multiple forward user beam coverage areas;means for generating respective access node-specific forward signals for transmission by a plurality of access nodes at geographically distributed locations to the multiple forward user beam coverage areas via the end-to-end relay, each of the respective access node-specific forward signals comprising a composite of respective forward beam signals weighted by respective forward beam weights of a forward beam weight matrix for end-to-end beamforming of transmissions from the plurality of access nodes to the multiple forward user beam coverage areas via the end-to-end relay; andmeans for sending the respective access node-specific forward signals to the ...

Подробнее
Номер записи: 85
05-04-2018 дата публикации

SATELLITE SYSTEM WITH ROLLING WAVE HANDOVERS

Номер: US20180097561A1
Автор: Turner Andrew E., Wharton Anne E.
Принадлежит: SPACE SYSTEMS/LORAL, LLC

A constellation of non-geosynchronous satellites are in a common orbit. Each time one of the satellites is at a trigger location, a new rolling wave of handovers is started that includes performing handovers of a group of dependent spot beams between adjacent satellites in sequence for pairs of adjacent satellites in a single direction around the orbit. 1. A satellite system , comprising:a plurality of satellites adapted to be in a common orbit and to implement handovers of beams between adjacent satellites in sequence for pairs of adjacent satellites in a single direction around the orbit.2. A satellite system according to claim 1 , wherein:the handovers of beams include handovers of all communication beams together per satellite.3. A satellite system according to claim 1 , wherein:the handovers of beams include handovers of all steerable communication beams together per satellite.4. A satellite system according to claim 1 , wherein:each satellite includes only steerable beams; andthe handovers of beams include concurrent handovers of all steerable beams per satellite.5. A satellite system according to claim 1 , wherein:the satellites are non-geosynchronous satellites; andthe plurality of satellites are configured such that each time one of the satellites is at a trigger location, a new rolling wave of handovers is started that includes performing handovers of a group of dependent spot beams between adjacent satellites in sequence for pairs of adjacent satellites in the single direction around the orbit.6. A satellite system according to claim 1 , wherein:the plurality of satellites include a first satellite and a second satellite;the orbit is divided into zones with gaps between the zones;the first satellite is configured to point all of its beams of a group of beams at ground locations associated with zone A+1;the first satellite is configured to move into zone A+1 from a gap between zone A and zone A+1 while the second satellite is in zone A+1;the second ...

Подробнее
Номер записи: 86
01-04-2021 дата публикации

FORWARD AND REVERSE CALIBRATION FOR GROUND-BASED BEAMFORMING

Номер: US20210099227A1
Автор: Sayegh Soheil
Принадлежит:

Methods and systems for calibrating the return and forward links of a satellite communication system are provided according to embodiments of the invention. The phase and/or amplitude variations caused by the return and forward links are calculated and/or estimated to aid in beamforming, such as ground-based beamforming. Calibration earth stations, distributed within one or more beam patterns, may be used to transmit calibration codes to the gateway to calibrate the return link. Return links variations may be estimated using a weighted minimum mean square algorithm at the gateway. Forward links may be calibrated with calibration codes transmitted from the gateway through a hybrid matrix to at least one calibration station. Forward calibration links may also calibrate for temperature-dependent signal variations such as diplexer variations at the satellite. 1. A satellite comprising:a receiver configured to receive signals from one or more gateways, wherein the receiver includes one or more feeds;one or more amplifiers coupled with the one or more feeds;an output hybrid matrix with one or more input ports coupled with the one or more amplifiers and one or more output ports;one or more diplexers coupled with the one or more output ports of the output hybrid matrix;a temperature sensor configured to measure temperature near the one or more diplexers; anda transmitter configured to transmit the signals received from the one or more gateways to one or more receivers and to transmit temperature data from the temperature sensor to the one or more gateways.2. The satellite according to claim 1 , wherein the temperature sensor comprises a plurality of temperature sensors.3. The satellite according to claim 2 , wherein the one or more diplexers comprise a plurality of diplexers.4. The satellite according to claim 3 , wherein the plurality of temperature sensors are configured to respectively measure temperatures of the plurality of diplexers.5. The satellite according to claim ...

Подробнее
Номер записи: 87
14-04-2016 дата публикации

Multibeam coverage for a high altitude platform

Номер: US20160105806A1
Автор: Anthony Robert Noerpel, Stanley Edward Kay
Принадлежит: HUGHES NETWORK SYSTEMS LLC

Multibeam coverage for a high altitude platform is disclosed. An example apparatus includes a plurality of antennas configured to provide communication coverage among a plurality of terminals within a specified area on the ground, each antenna being configured to communicate with a specified cell within the specified area. The antennas of the example apparatus have differently sized apertures to maintain a similar surface spectral density among the cells within the specified area.

Подробнее
Номер записи: 88
23-04-2015 дата публикации

MULTIPLE IN MULTIPLE OUT NETWORK CODED AMPLIFY AND FORWARD RELAYING SCHEME FOR THREE NODE BIDIRECTIONAL COOPERATION

Номер: US20150109992A1
Автор: Gao Wen, Li Jialing
Принадлежит: THOMSON LICENSING

A method and apparatus are described including receiving a first signal including first data in a first time slot of a first channel, receiving a second signal including second data in a second time slot of a second channel, determining a first pre-coding matrix, determining a second pre-coding matrix, applying the first pre-coding matrix to the first data to produce pre-coded first data, applying the second pre-coding matrix to the second data to produce pre-coded second data, generating a third signal by combining the pre-coded first data and the pre-coded second data and transmitting the third signal on the first channel and on the second channel. Also described are a method and apparatus including transmitting a first signal, receiving a second signal including a first training sequence and decoding the second signal by removing the first training sequence and removing the first signal. 124-. (canceled)25. A method , said method comprising:transmitting a first signal, wherein said first signal includes first data;receiving a second signal, wherein said second signal includes pre-coded data generated in a relay node by applying a first pre-coding matrix to said first data to maximize a joint channel capacity of a first channel and applying a second pre-coding matrix to second data to maximize a joint channel capacity of a second channel, said first pre-coding matrix and said second pre-coding matrix having been determined by the relay node; anddecoding said second signal by removing said first signal.2629-. (canceled)30. The method according to claim 25 , further comprising a first result generated by said first pre-coding matrix times a first estimated channel matrix and a second result generated by said second pre-coding matrix times a second estimated channel matrix claim 25 , said first result and said second result included between a first training sequence and data of said second signal.31. The method according to claim 25 , wherein a first beamforming ...

Подробнее
Номер записи: 89
13-04-2017 дата публикации

METHOD FOR ESTABLISHING RADIOFREQUENCY LINKS IN A TELECOMMUNICATION NETWORK WITH AN OPTIMISED GROUND GATEWAY NETWORK

Номер: US20170104521A1
Автор: Le Pera Alessandro
Принадлежит:

A method for establishing radiofrequency links via a satellite having several spots between a gateway and a service area comprising a plurality of elementary covering zones, designated cells, each cell being associated to a spot and including a plurality of terrestrial terminals, a forward link between the gateway towards the plurality of terrestrial terminals including a first step in which the gateway emits a first analog radiofrequency signal towards the satellite, with a first spectral efficiency; a second step in which a payload of the satellite receives the first analog radiofrequency signal; a third step in which the payload processes the first analog radiofrequency signal, and a fourth step in which the payload emits a plurality of second analog radiofrequency signals towards the cells with a second spectral efficiency, the first spectral efficiency being greater than the second spectral efficiency. 1. A method for establishing radiofrequency links via a multispot telecommunication satellite having several spots between at least one gateway and a service area comprising a plurality of elementary covering zones , designated cells , each cell being associated to a spot and comprising a plurality of terrestrial terminals , said method comprising establishing a forward link between the gateway towards the plurality of terrestrial terminals that comprises:a first step of uplink emission in which the gateway emits a first analog radiofrequency signal towards the multispot satellite, said first analog radiofrequency signal being emitted with a first spectral efficiency;a second step in which a payload of the multispot satellite receives the first analog radiofrequency signal; a first sub-step of analog-to-digital conversion of said first analog radiofrequency signal in order to obtain a first digital radiofrequency signal,', 'a second sub-step of demodulation and decoding of the first digital radiofrequency signal according to a first communication protocol in ...

Подробнее
Номер записи: 90
26-03-2020 дата публикации

SATELLITE FOR END TO END BEAMFORMING

Номер: US20200099442A1
Автор: Buer Kenneth V., Miller Mark J.
Принадлежит: VIASAT, INC.

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams. 1. A satellite for providing communications between a plurality of access nodes (ANs) and a plurality of user terminals , the plurality of ANs geographically distributed over an AN coverage area and the plurality of user terminals geographically distributed over a user coverage area , the satellite comprising:a feeder-link antenna subsystem to illuminate the access node (AN) coverage area, the feeder-link antenna subsystem comprising an array of cooperating feeder-link constituent transmit elements and an array of cooperating feeder-link constituent receive elements;a user-link antenna subsystem to illuminate the user coverage area, the user-link antenna subsystem comprising an array of cooperating user-link constituent transmit elements and an array of cooperating user-link constituent receive elements;a plurality of forward-link transponders, each coupled between a respective one of the feeder-link constituent receive elements and a respective one of the user-link constituent transmit elements; anda plurality of return-link transponders, each coupled between a ...

Подробнее
Номер записи: 91
04-04-2019 дата публикации

ADAPTIVE SATELLITE CHANNELIZER

Номер: US20190103912A1
Автор: Labrèche Oliver, TALBOT Pierre, Thériault Michel
Принадлежит: Macdonald, Dettwiler and Associates Corporation

An example of a configurable channelizer includes N input ports and K output ports, each supporting M separately sampled subchannels; and one or more control circuits configured to store and apply a set of first routing tables to route subchannels in groups of R subchannels, each first routing table has M*K/R entries that link M*K/R groups of subchannels with the input ports, where R is an integer that is greater than or equal to 1. 1. A configurable channelizer comprising:N input ports and K output ports, each supporting M separately sampled subchannels; andone or more control circuits configured to store and apply a set of first routing tables to route subchannels in groups of R subchannels, each first routing table has M*K/R entries that link M*K/R groups of subchannels with the input ports, where R is an integer that is greater than or equal to 2.2. The configurable channelizer of wherein the one or more control circuits are configurable to route individual subchannels according to second routing tables claim 1 , each second routing table including M*K entries that link the M subchannels of each of the K output ports with input ports.3. The channelizer of claim 1 , wherein a group of subchannels consists of R subchannels from an input port that are routed together according to the set of first routing tables claim 1 , each of the N input ports providing one or more groups of R subchannels.4. The channelizer of wherein of a group of subchannels consists of R subchannels received together that occupy sequential frequency ranges.5. The channelizer of further comprising a plurality of switching blocks claim 1 , an individual switching block comprising a plurality of switching stages arranged in series claim 1 , an individual switching stage configured to receive R subchannel samples from an input in series and to apply the same switching configuration for R clock cycles to route the R subchannel samples together.6. The channelizer of wherein R is greater than or ...

Подробнее
Номер записи: 92
02-06-2022 дата публикации

APPARATUS FOR DOPPLER SHIFT COMPENSATION, CORRESPONDING METHOD AND COMPUTER PROGRAM

Номер: US20220173799A1
Автор: Kovacs Istvan Zsolt, LASELVA Daniela, Wigard Jeroen
Принадлежит:

There is provided an apparatus, said apparatus comprising means for receiving from a network, at a user equipment, Doppler shift information associated with at least one cell of the network as a function of time for at least one area and using the Doppler shift information at the user equipment to compensate for the Doppler shift in communication with the network when the user equipment is in the at least one area. 1. An apparatus , comprising:at least one processor; andat least one memory including computer program code; receive from a network, at a user equipment, Doppler shift information associated with at least one cell of the network as a function of time for at least one area; and', 'use the Doppler shift information at the user equipment to compensate for the Doppler shift in communication with the network when the user equipment is in the at least one area., 'the at least one memory and the computer program code configured to cause the apparatus at least to2. The apparatus according to claim 1 , wherein the at least one processor and the computer program code are configured to cause the apparatus to:determine Doppler shift information associated with the at least one cell for the at least one area; andprovide the determined Doppler shift information to the network.3. The apparatus according to claim 1 , wherein the at least one processor and the computer program code are configured to cause the apparatus to:receive the Doppler shift information from the network using at least one of radio resource control signalling, broadcast signalling, multicast signalling and groupcast signalling.4. The apparatus according to claim 3 , wherein the broadcast signalling is broadcast per the at least one area.5. The apparatus according to claim 1 , wherein the at least one processor and the computer program code are configured to cause the apparatus to:provide a request for the Doppler shift information to the network from the user equipment; andreceive the Doppler shift ...

Подробнее
Номер записи: 93
02-06-2022 дата публикации

ADJUSTABLE PAYLOAD FOR SMALL GEOSTATIONARY (GEO) COMMUNICATION SATELLITES

Номер: US20220173801A1
Автор: Clausing Karl, Ebadi Siamak, Gedmark John, Joseph Steven, Keehr Edward, McLinko Ryan, Salz Braedon
Принадлежит:

An adjustable payload for small geostationary communication satellites is disclosed. In an example, a communication satellite includes a payload system having a software defined payload that is configured to provide communication services. The software defined payload includes a processor for providing at least one of gain control per transponder and carrier/sub-channel, channelization, channel routing, signal conditioning or equalization, spectrum analysis, interference detection, regenerative or modem processing, bandwidth flexibility, digital beamforming, digital pre-distortion or power amplifier linearization, for at least one user slice for a plurality of user terminals and at least one gateway slice for a gateway station. The software defined payload also includes an input side and an output side for each slice. Each input side includes an input filter and an analog-to-digital converter and each output side includes an output filter and a digital-to-analog converter. The payload system also includes antennas communicatively coupled to the software defined payload. 1. A payload system for a communications satellite , the payload system including:a software defined radio (“SDR”) configured to provide communication services, the SDR including a processor for providing at least one of gain control per transponder and carrier/sub-channel, channelization, channel routing, signal conditioning or equalization, spectrum analysis, interference detection, regenerative or modem processing, bandwidth flexibility, digital beamforming, digital pre-distortion or power amplifier linearization, for at least one user slice for a plurality of user terminals and at least one gateway slice for a gateway station;a front-end subsystem including an input side and an output side for each slice, each input side including an input filter and an analog-to-digital converter, each output side including an output filter and a digital-to-analog converter; anda plurality of antennas ...

Подробнее
Номер записи: 94
19-04-2018 дата публикации

Raised Antenna Patches with Air Dielectrics for Use in Large Scale Integration of Phased Array Antenna Panels

Номер: US20180108989A1
Автор: De Flaviis Franco, Yoon Seunghwan
Принадлежит:

A phased array antenna panel includes an array of antenna cells. Optionally, the phased array antenna panel includes a frame with multiple shielding fences housing the array of antenna cells. Each antenna cell includes a raised antenna patch with air dielectric. In one example, the raised antenna patch may include four projections having outwardly increasing widths, and four supporting legs, each of the four supporting legs situated between a pair of adjacent projections. A first differential feed port may be coupled to first and second supporting legs of the raised antenna patch through first and second transformers, and a second differential feed port may be coupled to third and fourth supporting legs of the raised antenna patch through third and fourth transformers. A return loss in a frequency range of between 27.5 GHz and 29.5 GHz of each antenna cell is less than about −10 dB. 1. A phased array antenna panel comprising:an array of antenna cells;each antenna cell in said array of antenna cells comprising a raised antenna patch with air dielectric;a first differential feed port coupled to a first and a second supporting leg of each raised antenna patch through first and second transformers;a second differential feed port coupled to a third and a fourth supporting leg of each raised antenna patch through third and fourth transformers.2. The phased array antenna panel of claim 1 , wherein said raised antenna patch comprises four projections having outwardly increasing widths claim 1 , each of said first claim 1 , second claim 1 , third claim 1 , and fourth supporting legs being situated between a pair of adjacent projections.3. The phased array antenna panel of claim 1 , wherein said first and second transformers each have a first segment wider than a second segment.4. The phased array antenna panel of claim 1 , wherein said third and fourth transformers each have a first segment narrower than a second segment.5. The phased array antenna panel of claim 3 , wherein ...

Подробнее
Номер записи: 95
29-04-2021 дата публикации

Broadband Satellite Communication System using Optical Feeder Links

Номер: US20210126705A1
Автор: MENDELSOHN AARON J.
Принадлежит:

Broadband satellite communications systems using optical feeder links are disclosed. Various optical modulation schemes are disclosed that can provide improved capacity for fixed spot beam, on board beamforming, and ground-based beamforming broadband satellite systems. 1. A satellite communication system comprising: an optical transmitter comprising a plurality of optical modulators, each optical modulator having an electrical input and an optical output;', 'an optical combiner having an output and a plurality of inputs, each input coupled to the optical output of a corresponding one of the plurality of optical modulators; and', 'a lens to transmit an optical output signal of the optical combiner; and, 'a plurality of satellite access nodes (SANs) each comprising an optical receiver having a lens pointed to receive the optical output signal transmitted by the lens of one of the plurality of SANs, and a plurality of digital outputs;', 'a plurality of electrical modulators, each having a digital input and an analog output, the digital input coupled to one of the plurality of digital outputs of the optical receiver;', 'a switch matrix having a plurality of switch matrix inputs and a plurality of switch matrix outputs, each switch matrix input coupled to the analog output of a corresponding one of the electrical modulators and each switch matrix output being selectively coupled to one of the switch matrix inputs; and', 'an antenna having a plurality of antenna inputs, each antenna input coupled to a corresponding one of the switch matrix outputs., 'a satellite comprising2. The system of claim 1 , further comprising a plurality of low noise amplifiers (LNAs) claim 1 , each LNA coupling one of the plurality of digital outputs of the optical receiver to the digital input of the corresponding one of the plurality of electrical modulators.3. The system of claim 1 , wherein each digital output of the optical receiver comprises a digital output of a corresponding one among a ...

Подробнее
Номер записи: 96
11-04-2019 дата публикации

Beamformer for end-to-end beamforming communications system

Номер: US20190109635A1
Автор: Christopher J. Cronin, Kenneth V. Buer, Mark J. Miller
Принадлежит: Viasat Inc

Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams.

Подробнее
Номер записи: 97
11-04-2019 дата публикации

MODULAR CHANNELIZER

Номер: US20190109636A1
Автор: Labrèche Oliver, TALBOT Pierre, Thériault Michel
Принадлежит: Macdonald, Dettwiler and Associates Corporation

An example of a channelizer includes a plurality of receiver circuits, an individual receiver circuit including a frequency demultiplexer that is configured to demultiplex a plurality of subchannels and a time-division demultiplexer coupled to the frequency demultiplexer, the time-division demultiplexer configured to time-division demultiplex the plurality of subchannels to provide a plurality of time-division outputs, an individual time-division output including portions of data from each of the plurality of subchannels; and a plurality of switch circuits, each configured to receive a different time-division output of the plurality of time-division outputs from the individual receiver. 1. A channelizer comprising:a plurality of receive circuits, an individual receive circuit including a frequency demultiplexer that is configured to demultiplex a plurality of subchannels and a time-division demultiplexer coupled to the frequency demultiplexer, the time-division demultiplexer configured to time-division demultiplex the plurality of subchannels to provide a plurality of time-division outputs, an individual time-division output of the plurality of time-division outputs including portions of data from each of the plurality of subchannels; anda plurality of switch circuits, each of the plurality of switch circuits configured to receive a different time-division output of the plurality of time-division outputs from the individual receive circuit.2. The channelizer of wherein the plurality of time-division outputs individually correspond to a plurality of distinct sample periods such that each of the plurality of time-division outputs includes a portion of data from each of the plurality of subchannels from an individual sample period assigned to the individual time-division output.3. The channelizer of wherein each of the plurality of time-division outputs from the individual receive circuit corresponds to a different distinct sample period claim 2 , with distinct sample ...

Подробнее
Номер записи: 98
09-06-2022 дата публикации

GROUND BASED BEAM FORMING WITH CLUSTERING

Номер: US20220182107A1
Автор: Becker Neal David, BHASKAR Uday R., Kay Stanley E.
Принадлежит:

A system and method for beamforming includes providing an antenna including feeds, a coverage area including service areas and data streams for each of the service areas; selecting a cluster of M feeds from the feeds; computing, with a GBBF processor (ground based beam former), M×N weights; generating M feed excitations by distributing the N data streams per the M×N weights; switching an array to transfer a respective one of the M feed excitations to a respective one of the M feeds; and beamforming, with the M feeds of the antenna, N beams. In the method, the N beams are each focused on a respective service area of each of the N data streams, the M×N weights improve the transmitting into the respective service area of each of the N data streams, and at least one of the N beams includes a portion of a plurality of the M feed excitations. 1. A method for beamforming comprising:selecting a cluster of M feeds from feeds for a coverage area comprising service areas and data streams for each of the service areas;generating M feed excitations by distributing N data streams per M×N weights;switching an array to transfer a respective one of the M feed excitations to a respective one of the M feeds; andbeamforming, with the M feeds of an antenna, N beams,wherein the N beams are each focused on a respective service area of each of the N data streams,the M×N weights improve transmitting into the respective service area of each of the N data streams, andat least one of the N beams comprises a portion of a plurality of the M feed excitations.2. The method of claim 1 , wherein the antenna comprises an array-fed reflector comprising the feeds claim 1 , and a count of the feeds is greater than M.3. The method of claim 1 , wherein M is greater than N.4. The method of claim 1 , wherein the M×N weights are weighted to account for a predicted offered traffic demand based on a usage pattern for each of the N data streams.5. The method of claim 1 , wherein the selecting claim 1 , the ...

Подробнее
Номер записи: 99
09-06-2022 дата публикации

CORRECTING FREQUENCY AND/OR PHASE IN A COMMUNICATION LINK

Номер: US20220182135A1
Автор: EDWARDS Fraser, Faulkner Andrew
Принадлежит:

A method for correcting frequency and/or phase in a communication link; a communication network; and a multiplexing and phase compensation unit are disclosed. The method for correcting frequency and/or phase in a communication link comprises receiving at least one reference transmission communicated via a wireless communication link; providing at least one identified characteristic by identifying at least one characteristic of the reference transmission; comparing said identified characteristic with at least one expected characteristic; and correcting a shift in frequency and/or phase of at least one communication signal communicated via the communication link based on a difference between the identified characteristic and the expected characteristic. 1. A method for correcting frequency and/or phase in a communication link , comprising:receiving at least one reference transmission communicated via a wireless communication link;providing at least one identified characteristic by identifying at least one characteristic of the reference transmission;comparing said identified characteristic with at least one expected characteristic; andcorrecting a shift in frequency and/or phase of at least one communication signal communicated via the communication link based on a difference between the identified characteristic and the expected characteristic.2. The method as claimed in claim 1 , wherein the reference transmission has a frequency range within a high frequency bandwidth up to 10 MHz.3. The method as claimed in claim 1 , wherein the reference transmission comprises one or a combination of; of:at least one pilot symbol, at least one pilot tone and/or a pilot complex waveform.4. The method as claimed in claim 1 , wherein the at least one characteristic comprises one or a combination of:frequency, time, phase, symbol, waveform, and/or modulation.5. The method as claimed in claim 1 , wherein the at least one expected characteristic comprises one or a combination of: ...

Подробнее
Номер записи: 100