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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

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Мониторинг СМИ

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

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка

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Применить Всего найдено 8096. Отображено 100.

05-01-2012 дата публикации

Test method and test device

Номер: US20120002554A1

Автор: Hiroyuki Ishii, Mikio Iwamura

Принадлежит: NTT DOCOMO INC

A test method according to the present invention includes: a first step of determining whether or not the mobile station detects the problem in a radio link state, when a radio quality is changed from a first state where the radio quality is equal to or more than a first threshold value to a second state where the radio quality is equal to or less than the first threshold value; and a second step of determining whether or not the mobile station does not detect the problem in a radio link state, when the radio quality is changed to a third state where the radio quality is equal to more than a second threshold value, after a lapse of a first time interval from a time point at which the radio quality is changed from the first state to the second state.

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Номер записи: 1

05-01-2012 дата публикации

Method and system for a radio transmission emulator

Номер: US20120003950A1

Автор: Ming Michael Meng

Принадлежит: Toyota Motor Engineering and Manufacturing North America Inc

The present invention relates to a method and system for a radio transmission emulator. In one embodiment, the present invention includes a radio transmission emulator system. The radio transmission emulator system includes a radio transmission emulator, an automobile, and/or a radio data analysis unit. The automobile can include a radio receiving unit. The radio transmission emulator generates a field simulation signal which simulates interferences. The field simulation signal is transmitted from the radio transmission emulator to the radio receiving unit. The radio receiving unit generates the radio data based on the field simulation signal. The radio data analysis unit analyzes the radio data to determine whether adjustments should be made to the radio receiving unit.

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Номер записи: 2

01-03-2012 дата публикации

Decision directed antenna diversity in radio frequency receivers

Номер: US20120052827A1

Автор: Ahmed K. Sadek, Raamkumar Balamurthi

Принадлежит: Qualcomm Inc

A white space sensing method includes receiving a signal on each of multiple antennas in an alternating fashion. The method also includes calculating feature metrics for incumbent signals on a given frequency channel for all antennas (e.g., pilot strength, luminance carrier strength (for NTSC)). The strongest of the antennas can be selected, based on the calculated feature metrics, for white space sensing.

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Номер записи: 3

22-03-2012 дата публикации

Rms and envelope detector

Номер: US20120071125A1

Автор: Abdullah Celik, Savas Tokmak, Yalcin A. Eken

Принадлежит: Hittite Microwave LLC

Disclosed herein are power detectors and methods for detecting the average power level of an RF input signal and the voltage envelope of the RF input signal. Also disclosed herein are linear envelope detectors and methods for detecting the voltage envelope of an RF input signal.

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Номер записи: 4

05-04-2012 дата публикации

System and method for measuring a signal of a communication system

Номер: US20120083290A1

Автор: JUNG Soo Jung, Kyeong In Jeong

Принадлежит: SAMSUNG ELECTRONICS CO LTD

The present invention relates to a method which involves resetting a signal-measuring cycle for an object system to a specific initial value when a terminal which communicates with one system has changed the location thereof by a value more than a specific reference value, and determines whether or not the intensity of the signal or phase information measured in a source system which is in communication with the terminal has changed by a value higher than a specific value, by means of determining whether or not the terminal has changed the location thereof, under the condition mobile communication system using different wireless connection techniques coexist.

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Номер записи: 5

09-08-2012 дата публикации

Information storage medium storing text-based subtitle, and apparatus and method for processing text-based subtitle

Номер: US20120201514A1

Автор: Hyun-Kwon Chung, Kil-Soo Jung, Man-seok Kang, Seong-Jin Moon, Sung-Wook Park

Принадлежит: SAMSUNG ELECTRONICS CO LTD

An information storage medium storing subtitle text-based information, and a method and apparatus utilizing same, process a subtitle The information storage medium includes: dialog information which contains script text information of the subtitle and information specifying an output type of the script text; and presentation information which contains style information used to convert the script text into a bitmap format through rendering. With this structure, the amount of data required for a subtitle and the amount of data that should be processed when a subtitle is output may be greatly reduced.

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Номер записи: 6

25-10-2012 дата публикации

System and method for simultaneous mimo signal testing with single vector signal analyzer

Номер: US20120269288A1

Автор: Christian Volf Olgaard, Ruizu Wang

Принадлежит: Litepoint Corp

Signal conversion circuitry and method for converting a multiple input, multiple output (MIMO) packet data signal transmission to a plurality of complex data samples for processing by shared test equipment, e.g., a single vector signal analyzer (VSA).

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Номер записи: 7

03-01-2013 дата публикации

Testing an upstream path of a cable network

Номер: US20130003565A1

Автор: David W. Jones, Michael D. Gotwals

Принадлежит: Acterna LLC

An apparatus and method for testing an upstream path of a cable network are disclosed. The upstream path is tested by capturing and analyzing upstream data packets generated by a specific terminal device. A test instrument is connected at a node of the cable network. The test instrument establishes a communication session with the headend, informing the headend of an identifier of the device that will generate the test upstream data packet. The test upstream data packet is captured and analyzed at the headend, so that the results of the analysis can be communicated back to the test instrument. To speed up the packet capturing and filtering process, the upstream data packets can be pre-filtered based on packet duration and/or arrival time.

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Номер записи: 8

14-03-2013 дата публикации

Bi-directional, compact, multi-path and free space channel replicator

Номер: US20130064550A1

Автор: Edward J. MacMullen, Inc. Eastern Optx, Jerome Lomurno, Joseph Mazzochette

Принадлежит: Inc. Eastern Optx

An apparatus for simulating radio frequency (RF) signal propagation characteristics in a wireless communication network is disclosed. The apparatus includes a first RF terminal and a second RF terminal. A first optical modulator is in electrical communication with the first RF terminal. An optical delay line is in optical communication with the first optical modulator. A first optical demodulator is in optical communication with the optical delay line and in electrical communication with the first RF terminal. A second optical demodulator is in optical communication with the optical delay line and in electrical communication with the second RF terminal. A second optical modulator is in electrical communication with the second RF terminal and in optical communication with the optical delay line.

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Номер записи: 9

21-03-2013 дата публикации

METHODS FOR DETECTING AND CLASSIFYING SIGNALS TRANSMITTED OVER A RADIO FREQUENCY SPECTRUM

Номер: US20130072128A1

Автор: Dain Dmitry, Livsics Eugene, MCHENRY Mark A., Ritterbush Olga, Steadman Karl

Принадлежит:

A method for classifying a signal is disclosed. The method can be used by a station or stations within a network to classify the signal as non-cooperative (NC) or a target signal. The method performs classification over channels within a frequency spectrum. The percentage of power above a first threshold is computed for a channel. Based on the percentage, a signal is classified as a narrowband signal. If the percentage indicates the absence of a narrowband signal, then a lower second threshold is applied to confirm the absence according to the percentage of power above the second threshold. The signal is classified as a narrowband signal or pre-classified as a wideband signal based on the percentage. Pre-classified wideband signals are classified as a wideband NC signal or target signal using spectrum masks. 1. A method of classifying a cooperative target signal within a channel by a dynamic spectrum access device , said method comprising:selecting a channelization for a spectrum region of interest;dividing a channel identified by the channelization into a plurality of bins;measuring energy detected by a detector within the plurality of bins;determining a degree of correlation between the measured energy and a target signal channel mask; andupon determining that the degree of correlation between the measured energy and the channel mask is above a correlation threshold, classifying the received energy as a target cooperative signal.2. A method as recited in claim 1 , wherein the size of each of the plurality of bins is determined by a resolution of the detector.3. A method as recited in claim 1 , wherein the size of the channel is selected to correspond to an expected size of the target cooperative signal.4. A method as recited in claim 1 , further comprising a step of selecting the target signal channel mask from a plurality of signal masks.5. A method as recited in claim 1 , further comprising determining the probability that the received energy comprises a target ...

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Номер записи: 10

21-03-2013 дата публикации

METHOD AND ARRANGEMENT FOR ADAPTIVE SIGNAL DETECTION

Номер: US20130072130A1

Автор: Matinmikko Marja, Rauma Tapio

Принадлежит: TEKNOLOGIAN TUTKIMUSKESKUS VTT

The present invention describes a new distributed decision making scheme for adaptive signal detection. The innovation describes an adaptive system and method for allocating signal detection resources that are used to find out the status of channel use (occupied/unoccupied). The system includes selection of suitable spectrum sensing methods and decision combining techniques as well as the associated parameters to meet the requirements set for the system in the specific operational environment. The result is that the system has good performance, simple implementation and is applicable to versatile time-variant situations. 1. A cognitive radio node in an adaptive signal detection system , the cognitive radio node comprising;a receiver for receiving instructions from a remote decision maker,a transceiver for sending signal detection data a remote fusion center, andat least one signal detection sensor,more than one signal detection schemes, each signal detection scheme having at least one measurement parameter, anda controller configured to, based on the received instructions, select one signal detection scheme, set at least one measurement parameter of the selected signal detection scheme, and operate the signal detection scheme with the set measurement parameter to obtain signal detection data indicative of the status of a desired signal channel range.2. A cognitive radio node in accordance with claim 1 , wherein one or more of the signal detection schemes are algorithms which utilize selected output of one or more of the at least one signal detection sensors and are stored in a storage medium of the cognitive radio node accessible by the controller.3. A cognitive radio node in accordance with claim 1 , wherein the desired signal channel range of the signal detection data is indicated in the received instructions and is a single frequency channel claim 1 , a set of dispersed frequency channels claim 1 , a portion of a spectrum band or one or more entire spectrum bands ...

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Номер записи: 11

28-03-2013 дата публикации

WIRELESS TRANSMISSION APPARATUS AND SELF-CHECKING METHOD OF WIRELESS TRANSMISSION APPARATUS

Номер: US20130077665A1

Автор: Lin Hongyong, Wang Yicai, Yu Guobin

Принадлежит: Huawei Technologies Co., Ltd.

A wireless transmission apparatus includes a service processing unit, a duplexer, a radio frequency receiving unit, a frequency synthesizer, and a controller. The controller controls, according to a reduced TR interval, the frequency synthesizer to adjust a frequency of a local oscillation signal which is output by the frequency synthesizer to the radio frequency receiving unit. The service processing unit continues to send a service signal as a self-checking signal, and a part of the self-checking signal leaks into the radio frequency receiving unit through the duplexer. After the radio frequency receiving unit mixes a received signal with the local oscillation signal, a frequency of the self-checking signal included in an output signal falls within a pass-band range of an intermediate frequency receiving unit, which ensures that the self-checking signal can be looped back to the service processing unit, thereby determines whether a fault occurs in its own transmission channel. 1. A wireless transmission apparatus , comprising a service processing unit , a duplexer , a radio frequency receiving unit , a frequency synthesizer , and a controller , wherein:the controller starts a self-checking function, reduces a TR interval into a preset range, and controls, according to the reduced TR interval, the frequency synthesizer to adjust a frequency of a local oscillation signal which is output by the frequency synthesizer to the radio frequency receiving unit;the service processing unit continues to send a service signal as a self-checking signal, and after the self-checking signal is modulated into a radio frequency signal, a part of the self-checking signal leaks into the radio frequency receiving unit through the duplexer;after the radio frequency receiving unit mixes a received signal with the local oscillation signal, a frequency of the self-checking signal comprised in an output signal falls within a pass-band range of an intermediate frequency receiving unit; andthe ...

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Номер записи: 12

28-03-2013 дата публикации

METHOD OF SECURING A WIRELESS COMMUNICATION, RECEIVER DEVICE AND COMMUNICATION SYSTEM IMPLEMENTING THIS METHOD

Номер: US20130078906A1

Автор: Ben Hamida Sana, Castelluccia Claude, Pierrot Jean-Benoit, SAVRY Olivier, Thevenon Pierre-Henri

Принадлежит: Commissariat A L'Energie Atomique Et Aux Energies Alternatives

A method for securing a wireless communication between a transmitter and a receiver includes: reception of a signal by the receiver; extraction by the receiver of at least one noise parameter of this signal received; comparison of the extracted noise parameter with at least one corresponding reference noise parameter stored in a memory in the receiver; decision on the presence or absence of a relay device between the transmitter and the receiver according to the result of this comparison; a preliminary calibration of the receiver, wherein: the receiver receives a signal resulting from a direct communication with the transmitter without intervention of a relay device, the receiver extracts at least one noise parameter from the signal received, and the receiver stores this noise parameter in the memory as a reference noise parameter characteristic of a direct communication without a relay device between the transmitter and the receiver. 19-. (canceled)10. A method for securing a wireless communication between a transmitter device and a receiver device , comprising:reception of a signal by the receiver device;extraction by the receiver device of at least one noise parameter of this signal received;comparison of the extracted noise parameter with at least one corresponding reference noise parameter stored in a memory in the receiver device;decision on the presence or the absence of a relay device between the transmitter device and the receiver device according to the result of this comparison; the receiver device receives a signal resulting from a direct communication with the transmitter device without intervention of a relay device;', 'the receiver device extracts at least one noise parameter from the signal received; and', 'the receiver device stores this noise parameter in the memory, as a reference noise parameter characteristic of a direct communication without a relay device between the transmitter device and the receiver device., 'a preliminary calibration of ...

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Номер записи: 13

04-04-2013 дата публикации

System forTransmission of Signals in a Domestic Environment

Номер: US20130083833A1

Автор: Lo Hine Tong Dominique, LOUZIR Ali, PINTOS Jean-Francois, Robert Jean-Luc

Принадлежит:

The present invention relates to a wireless transmission system for signals intended more specifically for a domestic environment. It includes a central terminal comprising at least m transmission channels and n directive transmission antennas intended to transmit first signals at least one client terminal having at least one reception channel connected to a reception antenna in order to receive the first signals said central terminal and said client terminal communicating in a transmission channel having a predetermined frequency band, and an estimation device able to generate an item of information representative of the reception quality of first signals in at least one point of a predetermined geographic zone associated with the client terminal and a return channel in order to transmit said at least one item of information to the control means of the central terminal. 1. System for transmission of signals comprising:{'b': '1', 'a central terminal comprising at least m transmission channels and n transmission antennas intended to transmit first signals, with n>m>, switching means for associating with each signal transmission channel one antenna from among the n antennas according to a switching schema selected by control means,'}{'b': '2', 'at least one client terminal () comprising at least one reception channel connected to a reception antenna in order to receive first signals transmitted via the central terminal said central terminal and said client terminal being able to communicate in a transmission channel having a predetermined frequency band,'}wherein, the transmission antennas are directive antennas, each transmission antenna being able to transmit first signals in a predetermined angular sector,and the system also comprising an estimation device able to generate at least one item of information on the reception quality of first signals transmitted by the central terminal in at least one point of a predetermined geographic zone associated with the client ...

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Номер записи: 14

11-04-2013 дата публикации

APPARATUS, METHODS, AND ARTICLES OF MANUFACTURE TO PREDICT VECTORED DIGITAL SUBSCRIBER LINE (DSL) PERFORMANCE GAINS

Номер: US20130089129A1

Автор: Hart Richard Dennis, Kimble David Lewis, Tennyson Gary, Wang Jin

Принадлежит: AT&T Intellectual Property I, L.P.

Apparatus, methods and articles of manufacture to predict vectored digital subscriber line (DSL) performance gains are disclosed. A disclosed example method includes determining a model coefficient of a noise-to-margin ratio (NMR) model from performance data measured for a DSL subscriber loop prior to provisioning of vectoring for the DSL subscriber loop, computing, using the model coefficient, a first NMR value with disturbers enabled and a second NMR value with disturbers disabled, and estimating an expected vectoring performance gain for the DSL subscriber loop based on the first and second NMR values. 1determining a model coefficient of a noise-to-margin ratio model from performance data measured for a digital subscriber line subscriber loop prior to provisioning of vectoring for the digital subscriber line subscriber loop;computing, using the model coefficient, a first noise-to-margin ratio value with disturbers enabled and a second noise-to-margin ratio value with disturbers disabled; andestimating an expected vectoring performance gain for the digital subscriber line subscriber loop based on the first and second noise-to-margin ratio values.. A method comprising: This patent arises from a continuation of U.S. application Ser. No. 12/968,858 entitled “APPARATUS, METHODS, AND ARTICLES OF MANUFACTURE TO PREDICT VECTORED DIGITAL SUBSCRIBER LINE (DSL) PERFORMANCE GAINS” and filed on Dec. 15, 2010, which is hereby incorporated by reference in its entirety.This disclosure relates generally to digital subscriber line (DSL) subscriber loops and, more particularly, to apparatus, methods and articles of manufacture to predict vectored DSL performance gains for subscriber loops.Vectored DSL is an emerging DSL technology that offers significant improvements in achievable transmission rates over copper twisted-pair wires. In vectored DSL communication systems, a vectoring engine uses collected measurements characterizing crosstalk between a set of subscriber loops to ...

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Номер записи: 15

11-04-2013 дата публикации

RECEIVING APPARATUS AND RADIO COMMUNICATION METHOD

Номер: US20130090069A1

Автор: Nishio Akihiko

Принадлежит: Panasonic Corporation

A radio communication device capable of lightening the influence of a frequency selective fading in the wide-band transmission of a single carrier thereby to prevent deterioration of error rate characteristics. In this device, an FFT unit subjects a modulated signal inputted from a modulation unit to a Fourier transformation. A pilot insertion unit inserts a pilot symbol into a plurality of individual frequency components of the modulated signal. Weight multiplication units multiply the individual frequency components and the pilot symbols inserted into the individual frequency components, by weight coefficients set at a weight coefficient setting unit. IFFT units subject the frequency components to an inverse Fourier transformation, thereby to convert the frequency components into time domains. 1. A receiving apparatus communicating with a radio communication apparatus , the receiving apparatus being configured to:transmit, to the radio communication apparatus, a pilot signal; andreceive a first transmission signal and a second transmission signal, which are transmitted from the radio communication apparatus,wherein the first transmission signal is obtained by weighting, at the radio communication apparatus, each of a plurality of signals, which have respectively different frequencies in a frequency domain, using a first weighting factor, and the second transmission signal is obtained by weighting, at the radio communication apparatus, each of the plurality of signals using a second weighting factor, the first weighting factor and the second weighting factor being set for each of the plurality of signals.2. The receiving apparatus according to claim 1 , wherein the first weighting factor and the second weighting factor are set for each of the plurality of signals in accordance with a propagation path quality for the plurality of signals.3. The receiving apparatus according to claim 1 , wherein each of the plurality of signals is multiplied by the first weighting ...

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Номер записи: 16

11-04-2013 дата публикации

METHOD FOR CONTROLLING RANDOM ACCESS FOR THE EFFICIENT SENSING OF THE COOPERATIVE SPECTRUM IN A COGNITIVE RADIO-BASED FREQUENCY RESOURCE SHARING SYSTEM

Номер: US20130090145A1

Автор: Hong Daesik, Jo Junho, LEE Jihyun, Noh Gosan, Wang Hanho

Принадлежит:

An embodiment of the present invention relates to a method for performing spectrum sensing to detect a signal for a terminal of a primary user in each sensing node. The method for performing sensing may comprise the steps of: performing, by the sensing node, spectrum sensing to detect a signal for a terminal of a primary user; computing, by the sensing node, a local test statistic on the basis of the result of the spectrum sensing; calculating, by the sensing node, the transmission probability on the basis of the computed local test statistic; and transmitting, by the sensing node, sensing information to a convergence center on the basis of the calculated transmission probability. In this case, the convergence center can determine whether the signal for a primary user exists on the basis of the transmitted sensing information. 1. A method for performing spectrum sensing to detect a signal for a terminal of a primary user in each sensing node , the method comprising:performing, by the sensing node, spectrum sensing to detect a signal for a terminal of a primary user;computing, by the sensing node, a local test statistic value on the basis of the result of the spectrum sensing;calculating, by the sensing node, a transmission probability on the basis of the computed local test statistic value; andtransmitting, by the sensing node, sensing information to a fusion center on the basis of the calculated transmission probability,wherein it is determined whether there is a signal for a terminal of a primary user on the basis of the transmitted sensing information at the fusion center.2. The method of claim 1 , wherein the sensing information includes the local test statistic value.3. The method of claim 2 , wherein the local test statistic value includes the energy value of the primary user received from the sensing node.4. The method of claim 1 , wherein the transmission probability is determined on the basis of a size of a local test statistic value.5. The method of claim ...

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Номер записи: 17

18-04-2013 дата публикации

SYSTEM AND METHOD FOR DETECTING AND MEASURING UPLINK TRAFFIC IN SIGNAL REPEATING SYSTEMS

Номер: US20130095749A1

Автор: Kummetz Thomas

Принадлежит:

A signal repeating system for a wireless network includes an antenna configured for transceiving signals between a base station and a user equipment device. Repeating circuitry is coupled to the antenna and defines an uplink path for signals from the user equipment device to the base station and a downlink path for signals from the base station to the user equipment device. The repeating circuitry includes gain circuitry and gain control circuitry that is coupled to the gain circuitry. The gain control circuitry is operable for varying the gain of the repeating circuitry according to a waveform. Measurement circuitry measures the receive power in the uplink path over time from the user equipment device. Processing circuitry cross-correlates the inverted gain variation waveform with the measured receive power for determining the existence of traffic from user equipment devices in the uplink path. 1. A signal repeating system for a wireless network comprising:at least one first antenna configured for transceiving signals with at least one user equipment device;repeating circuitry coupled to the at least one first antenna and defining an uplink path for signals from the user equipment device back to a base station, the repeating circuitry including circuitry for varying the level of signals handled in the uplink path;control circuitry in the repeating circuitry that is operable to control how the level of signals in the uplink path are varied;measurement circuitry for measuring, over time, the receive power in the uplink path in a particular frequency band where traffic is expected from the at least one user equipment device;processing circuitry for comparing a signal associated with the uplink path level variation with the measured receive power for determining the existence of traffic from user equipment devices in the uplink path.2. The signal repeating system of wherein the repeating circuitry has gain circuitry for varying the gain of signals handled in the uplink ...

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Номер записи: 18

18-04-2013 дата публикации

PAIRING WIRELESS DEVICES OF A NETWORK USING RELATIVE GAIN ARRAYS

Номер: US20130095868A1

Автор: Botic James S., Salsbury Timothy I.

Принадлежит: Johnson Controls Technology Company

A method for pairing a first wireless device with a second wireless device includes gathering a first wireless communications characteristic about communications between the first wireless device and the second wireless device. The method further includes gathering second wireless communications characteristics about communications between the first wireless device and at least one wireless device other than the second wireless device. The method further includes generating a relative gain array from the communications characteristics and computing the pairing between the first wireless device and the second wireless device using the generated relative gain array. The method further includes configuring the first wireless device and/or the second wireless device based on the computed pairing. 1. A method for pairing a first wireless device with a second wireless device , comprising:gathering a first wireless communications strength indicator about communications between the first wireless device and the second wireless device;gathering second wireless communications strength indicator about communications between the first wireless device and at least one wireless device other than the second wireless device;generating a relative gain array using the first and second wireless communications strength indicators;computing the pairing between the first wireless device and the second wireless device using the generated relative gain array; andconfiguring at least one of the first wireless device and the second wireless device based on the computed pairing.2. The method of claim 1 , wherein the first and second wireless communications strength indicators are at least one of signal strength measurements and signal to noise ratios.3. The method of claim 1 , wherein generating the relative gain array further comprises:generating at least one data structure storing the first and second wireless communications strength indicators; andcalculating power level values for each of ...

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Номер записи: 19

02-05-2013 дата публикации

Antenna Tuning Using the Ratio of Complex Forward and Reflected Signals

Номер: US20130107914A1

Автор: DAKSHINAMURTHY Sriraman, Fujimoto William, Lorenz Robert, Park Bongseok

Принадлежит:

Embodiments operate to reduce impedance mismatch between the PA and the antenna in a transceiver, thereby reducing the VSWR at the PA output and improving both the delivered power to the antenna and receiver sensitivity. In embodiments, an antenna tuner is placed between the PA and the antenna. The antenna tuner includes programmable components that can be tuned in order to effect an impedance translation between the antenna and the PA output, thereby reducing reflections seen by the PA. In an embodiment, the antenna tuner is adapted dynamically based on changes in the impedance of the antenna. Accordingly, the PA is operated very close to its optimal load impedance. In another embodiment, the antenna tuner is controlled based on measurement of the voltage reflection coefficient S 1. A method for controlling an antenna tuner coupled between a power amplifier (PA) and an antenna in a wireless device , comprising:measuring forward and reflected signal components at an output of the PA, wherein the forward and reflected signal components result from applying an input signal to a transmit path of the wireless device;generating amplitude and phase information from each of the measured forward and reflected signal components;estimating a voltage reflection coefficient using the generated amplitude and phase information; andadjusting the antenna tuner based on the voltage reflection coefficient to reduce an impedance mismatch between the PA and the antenna.2. The method of claim 1 , wherein measuring the forward and reflected signal components comprises selectively controlling a directional coupler coupled to the output of the PA.3. The method of claim 1 , wherein generating the amplitude and phase information from each of the measured forward and reflected signal components comprises separately down-converting and digitizing the forward and reflected signal components to generate respectively forward digital baseband in-phase (I) and quadrature (Q) signals and reflected ...

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Номер записи: 20

02-05-2013 дата публикации

SIGNAL DEGRADATION DETECTION

Номер: US20130109336A1

Автор: Blackman Wendell, Elkaissi Moutaz, Goldey Greg, Jackson Robert J.V., Nguyen Hao, SOTELO Jorge, Zhang Tianhua

Принадлежит: EchoStar Technologies L.L.C.

Implementations are directed to predicting signal degradation at receivers used to display a programming service. The receivers capture signal strength data that is then transmitted to a processing location, which may be associated with a provider of the programming service. A signal degradation detector at the provider operates to predict whether or not a future unacceptable signal quality will occur within a time interval. The prediction may be based on a test quantity calculated from signals captured at the receiver and based on a figure of merit for the geographic locale in which the receiver is located. A maintenance call may be initiated for those receivers that have such a poor signal quality. 1. A method to predict a maintenance condition of a receiver , comprising:determining a time series of test quantities for the receiver, the test quantities based on signal strength measurements collected at the receiver at a plurality of time instances;receiving a figure of merit for the receiver, the figure of merit indicating an expected signal quality for the receiver;eliminating the receiver as a candidate for failure prediction if the time series of test quantities is equal or greater than the figure of merit for a predetermined period of time;determining a failure prediction for the receiver based on the time series of test quantities and the figure of merit, the act of determining the failure prediction only performed if the receiver is not eliminated as a candidate for failure prediction; andidentifying the receiver if the failure prediction indicates a future unacceptable signal strength for the receiver.2. The method of claim 1 , further comprising:eliminating the receiver as a candidate for failure prediction if the time series of test quantities trends level or trends upward for a predetermined number of time instances.3. The method of claim 1 , further comprising:applying recursive linear regression to the time series of test quantities and the figure of ...

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Номер записи: 21

09-05-2013 дата публикации

EXTRACTING PARAMETERS FROM A COMMUNICATIONS CHANNEL

Номер: US20130114660A1

Автор: Alexander Paul Dean, Haley David Victor Lawrie

Принадлежит: Cohda Wireless Pty. Ltd.

A method for extracting a parameter of a communication channel from a channel estimate that characterises the communication channel in terms of a frequency response over time. The method includes generating a set of feature identifiers that characterise features of the channel, for example energy peaks or troughs and determining the parameter, for example time delay of a multipath signal or frequency offset of a multipath signal, dependent on the feature identifiers. Methods using the parameter are also described including methods to estimate the environment. 1. An apparatus for extracting parameters from a communications channel estimate , comprising:an input to receive at least one estimate of the channel in the form of a frequency response over a period of time;a channel parameter calculator to generate at least one channel parameter for the communications channel based on the estimate; andan output to output the generated at least one channel parameter.2. The apparatus of claim 1 , wherein the generated parameter characterises multipath effects in the communications channel.3. The apparatus of claim 1 , wherein the channel parameter calculator extracts a relative delay of multipath components from the channel estimate.4. The apparatus of claim 1 , wherein the channel parameter calculator extracts a relative frequency offset of multipath components from the channel estimate.5. The apparatus of claim 1 , wherein the channel parameter calculator measures the spacing of adjacent features of the same type in the frequency domain channel.6. The apparatus of claim 5 , wherein the features are selected from the group: peaks (high power) and troughs (low power).7. The apparatus of claim 5 , wherein the channel parameter calculator extrapolates a said feature beyond the period of time.8. The apparatus of claim 7 , wherein channel parameter calculator extrapolates a said feature over a gaps in time between consecutive inputs in which a said frequency response has not been ...

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Номер записи: 22

16-05-2013 дата публикации

Adaptive Offset Adjustment Algorithm

Номер: US20130121391A1

Автор: Chidambara Sundararajan, Kocaman Namik Kemal, Momtaz Afshin, Pillai Velu Chellam, Telang Vivek, Valliappan Magesh

Принадлежит: BROADCOM CORPORATION

An apparatus and method is disclosed to compensate for one or more offsets in a communications signal. A communications receiver may carry out an offset adjustment algorithm to compensate for the one or more offsets. An initial search procedure determines one or more signal metric maps for one or more selected offset adjustment corrections from the one or more offset adjustment corrections. The offset adjustment algorithm determines one or more optimal points for one or more selected offset adjustment correction based upon the one or more signal maps. The adaptive offset algorithm adjusts each of the one or more selected offset adjustment corrections to their respective optimal points and/or each of one or more non-selected offset adjustment corrections to a corresponding one of a plurality of possible offset corrections to provide one or more adjusted offset adjustment corrections. A tracking mode procedure optimizes the one or more adjusted offset adjustment corrections. 1. An apparatus for compensating for an offset in a communication signal , comprising:an amplifier array configured to amplify the communication signal in accordance with a plurality of gain stages to provide an amplified communication signal, each of the plurality of gain stages being coupled to a corresponding summation network from among a plurality of summation networks; andan adaptive offset adjustment module configured to determine a signal metric based upon the amplified communication signal and to provide a plurality of offset adjustment corrections to the plurality of summation networks based upon the signal metric to compensate for the offset.2. The apparatus of claim 1 , wherein the adaptive offset adjustment module is further configured to:select a first possible offset correction value from among a plurality of possible offset correction values as the plurality of offset adjustment corrections,determine the signal metric when the first possible offset correction value is applied to ...

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Номер записи: 23

16-05-2013 дата публикации

SYSTEMS AND METHODS FOR TESTING RADIO-BASED DEVICES

Номер: US20130122825A1

Автор: Badiere Daniel Noel, Deforge John Bradley, Devries Christopher

Принадлежит: RESEARCH IN MOTION LIMITED

Embodiments are disclosed of a switchplexer for performing test operations on a radio device. The switchplexer comprises a plurality of test ports corresponding to a plurality of radio device ports and a plurality of switches for routing test signals between the individual test ports. Processing logic is disclosed for controlling actuation of the switches to route test signals between individual test ports. The switchplexer disclosed herein may be incorporated into a mobile test device for self-test operations or may be used in a manufacturing or maintenance facility for testing and calibration operations. 1. A switchplexer for performing test operations on a radio device , comprising:a plurality of test ports corresponding to a plurality of radio device ports;a plurality of switches comprising at least a transmitter switch and a receiver switch, the transmitter switch configured to allow testing via a transmitter path and the receiver switch configured to allow testing via a receiver path;a circuit operable to provide a test signal measurement value corresponding to the presence of a test signal at individual test ports of said plurality of test ports; andprocessing logic operable to actuate said plurality of switches to route said test signal between said individual test ports;wherein said test signal measurement values are used to perform self-test operations associated with at least a transmitter or a receiver of said radio device via the transmitter path or the receiver path, respectively.2. The switchplexer of claim 1 , wherein said plurality of radio device ports comprise at least one of the set of:a live-air radio transmitter test port operable to transmit said test signal;a live-air radio receiver test port operable to receive said test signal;an antenna port operable to transmit and receive said test signal;a broadband radio receiver test port operable to receive said test signal; anda bypass test port operable to transmit or receive said test signal.3. ...

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Номер записи: 24

16-05-2013 дата публикации

METHOD FOR MEASURING INTER-FREQUENCY

Номер: US20130122840A1

Автор: JUNG Manyoung, Lee SangWook, LIM Suhwan, YANG Yoonoh

Принадлежит: LG ELECTRONICS INC.

According to an embodiment of the present invention, a method is provided for measuring inter-frequency in a receiver including a plurality of reception antennas. The method may comprise the steps of: performing a service using a first frequency through a first antenna and/or a second antenna; measuring a second frequency using the first antenna while the service continues to be performed using the first frequency through the second antenna; and estimating the measurement result without the second frequency being practically measured through the second antenna by using the measurement result of the second frequency through the first antenna. 1. A method of measuring inter-frequency in a receiver comprising a plurality of reception antennas , the method comprising the steps of:performing service using a first frequency through one or more of a first antenna and a second antenna;performing measurement for a second frequency using the first antenna while continuing to perform the service using the first frequency through the second antenna; andestimating a result of measurement for the second frequency through the second antenna without actual measurement for the second frequency through the second antenna, using a result of the measurement for the second frequency through the first antenna.2. The method of claim 1 , wherein service is performed by receiving and processing the first frequency through the first antenna claim 1 , while the measurement for the second frequency is performed.3. The method of claim 1 , wherein the step of performing the measurement for the second frequency comprises the step of retuning a reception terminal of the first antenna to the second frequency.4. The method of claim 3 , wherein service is performed by receiving and processing the first frequency through the second antenna claim 3 , while the reception terminal of the first antenna is retuned to the second frequency.5. The method of claim 1 , wherein a measurement value for the second ...

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Номер записи: 25

16-05-2013 дата публикации

Receiver and method of estimating signal to noise power ratio

Номер: US20130122843A1

Автор: Masahito Sakai

Принадлежит: NEC Corp, NTT DOCOMO INC

Provided are a receiver and a method of estimating signal to noise power ratio. The receiver estimates a signal-to-noise power ratio, according to an average value of a signal power and an average value of a noise power of a reference signal mapped to the received signal, estimates signal-to-noise power ratio by means of EESM operation according to each signal-to-noise power ratio of the reference signal, makes a judgment on a magnitude of either the signal-to-noise power ratio appointed according to the average values or the signal-to-noise power ratio estimated by means of the EESM operation, and outputs one of the signal-to-noise power ratio appointed according to the average values and the signal-to-noise power ratio estimated by means of the EESM operation, as a reception quality SNR, in response to the judgment result.

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Номер записи: 26

23-05-2013 дата публикации

METHOD FOR DETECTING WITH A HIGH TEMPORAL ACCURACY A THRESHOLD CROSSING INSTANT BY A SIGNAL

Номер: US20130128939A1

Автор: Casti Maurizio

Принадлежит: THALES ITALIA S.P.A.

A method detects a threshold crossing instant at which a signal crosses a threshold, by: sampling the signal at plural sampling instants spaced from one another by a sampling period; detecting consecutive first and second sampling instants at which the signal has a first signal value lower than or equal to the threshold, and the signal has a second signal value higher than the threshold, respectively; calculating a first interval indicative of a time between the threshold crossing instant and the first sampling instant; setting a reference signal having a reference amplitude representing the first interval relative to a reference scale; generating a signal with a delay depending on said reference signal; generating a threshold crossing detection signal at an instant delayed by a second interval; calibrating the reference scale of the reference amplitude so that the second interval is substantially equal to the first interval. 1. A method for detecting , through an electronic detection device , a threshold crossing instant at which an electrical signal crosses a threshold , comprising:defining by a clock signal a sequence of discrete clock instants, such that two consecutive clock instants of said sequence are spaced in time from one another by a clock period;sampling the electrical signal with a sampling period equal to the clock period, at a plurality of sampling instants belonging to said sequence of clock instants;detecting a first sampling instant and a subsequent consecutive second sampling instant, such that in one of said first and second sampling instants the sampled signal value has a first signal value lower than, or equal to, the threshold, and in the other one of said first and second sampling instants the sampled signal value has a second signal value higher than the threshold;calculating, on the basis of said first signal value, second signal value and threshold, a first time interval, indicative of a temporal distance between the threshold crossing ...

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Номер записи: 27

23-05-2013 дата публикации

Method and Associated Apparatus of Communication Parameter Detection

Номер: US20130129022A1

Автор: Wei Fong-Shih

Принадлежит: MStar Semiconductor, Inc.

A method of communication parameter detection for detecting a temporal length of a guard interval of cyclic messages in a communication is provided. The method includes: searching peaks of an autocorrelation signal in the communication signal, and providing a peak for each cyclic message; sorting a time difference between two consecutive peaks to one of bins of a histogram, and determining the temporal length of the guard interval according to a result of the histogram; while a peak is found, providing a signal average according to an average of the autocorrelation signal over an average calculating period, comparing whether a ratio of the peak to the signal average is greater than a threshold, and accordingly detecting whether the communication signal carries valid information. 1. A method of detecting a temporal length of a guard interval for a communication signal , the communication signal comprising a plurality of cyclically arranged cyclic messages each having a duration of the guard interval , the method comprising:providing an autocorrelation signal according to the communication signal;searching the autocorrelation signal to provide a corresponding peak for each of the cyclic messages;performing a histogram counting to sort a time difference between two successive peaks to one of a plurality of bins; anddetermining the temporal length of the guard interval according to a result of the histogram counting.2. The method according to claim 1 , wherein the temporal length of the guard interval is selected from a plurality of candidate guard intervals claim 1 , and the step of providing the autocorrelation signal is providing the autocorrelation signal according to a shortest candidate guard interval of the candidate guard intervals.3. The method according to claim 1 , wherein the temporal length of the guard interval is selected from a plurality of candidate guard intervals claim 1 , and the step of providing the autocorrelation signal comprises:delaying the ...

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Номер записи: 28

23-05-2013 дата публикации

SYSTEM AND METHOD FOR INTEGRALLY COLLECTING RAINFALL ATTENUATION AND RAINFALL INTENSITY DATA IN SATELLITE SYSTEM

Номер: US20130130618A1

Автор: Ahn Do Seob, CHOI Kyung Soo, Kim Jae Hoon

Принадлежит: Electronics and Telecommunications Research Institute

A system and method for observing a wireless frequency in a space between planets is provided. A system for integrally collecting rainfall intensity and rainfall attenuation data may include a remote measuring apparatus to measure an amount of a rainfall attenuation of a satellite signal based on a rainfall intensity at a predetermined point, to generate rainfall intensity and rainfall attenuation data based on the amount of the rainfall attenuation measured, and to transmit the generated rainfall intensity and rainfall attenuation data to a satellite relay, and an integrated center system to collect the generated rainfall intensity and rainfall attenuation data from the satellite relay. 1. A system for integrally collecting rainfall intensity and rainfall attenuation data , the system comprising:a remote measuring apparatus to measure an amount of a rainfall attenuation of a satellite signal based on a rainfall intensity at a predetermined point, to generate rainfall intensity and rainfall attenuation data based on the amount of the rainfall attenuation measured, and to transmit the generated rainfall intensity and rainfall attenuation data to a satellite relay; andan integrated center system to collect the generated rainfall intensity and rainfall attenuation data from the satellite relay.2. The system of claim 1 , wherein the remote measuring apparatus comprises:a remote measuring unit to generate rainfall intensity and rainfall attenuation data, by measuring a rainfall intensity, and an amount of a rainfall attenuation in which a receiving intensity of a satellite signal corresponding to the rainfall intensity is reflected, using a separate measuring device at a predetermined point;a data processing unit to preprocess the generated rainfall intensity and rainfall attenuation data in order to transmit the generated rainfall intensity and rainfall attenuation data to an integrated center; anda satellite terminal antenna controlling unit to transmit the ...

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Номер записи: 29

23-05-2013 дата публикации

Electronic Device Testing Using Radio Signals

Номер: US20130130629A1

Автор: Hannon Timothy Patrick, Ingrassia Michael, ROGERS MATTHEW, Warren Daniel A.

Принадлежит: Apple Inc.

Methods and devices are disclosed for controlling an electronic device using data transmitted over radio signals. In some embodiments, a radio source may embed instructions to control an electronic device into a radio signal. Alternatively, data relating to test parameters of other test equipment may be embedded into the radio signal. For example, the radio source may use the RDS communications protocol to transmit the instructions in an FM radio signal. In a testing environment, the electronic device may locally save the test parameters, and associate the test parameters with the results of a test. 1. A method of testing an electronic device using a test control station and test equipment , comprising:configuring the test equipment to affect an operating condition of the electronic device;providing test equipment parameters from the test control station to the electronic device, wherein the test equipment parameters are indicative of the configuring;saving the test equipment parameters at the electronic device;running a test of the electronic device; andassociating results of the test with the saved test equipment parameters at the electronic device.2. The method of claim 1 , wherein the configuring comprises receiving manual manipulations of the test equipment from a user.3. The method of claim 1 , further comprising supplying the test equipment parameters from the test control station to the test equipment claim 1 , wherein the configuring is performed responsive to the supplying.4. The method of claim 1 , wherein the configuring comprises changing the positioning of the electronic device relative to the test control station.5. The method of claim 1 , wherein the test is run in a testing environment claim 1 , and wherein the configuring comprises changing at least one condition of the testing environment.6. The method of claim 1 , wherein the providing comprises transmitting a radio signal to the electronic device claim 1 , and wherein the test equipment ...

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Номер записи: 30

23-05-2013 дата публикации

Method of Receiving and Receivers

Номер: US20130130635A1

Автор: Immonen Antti Oskari, KAUKOVUORI Jouni Kristian, Parssinen Aarno Tapio

Принадлежит: RENESAS MOBILE CORPORATION

Data is received that has been transmitted via a combination of radio frequency signals using carrier aggregation, each radio frequency signal occupying a respective radio frequency band, the bands being arranged in two groups separated in frequency by a first frequency region, the first of the two groups occupying a wider frequency region than the second group. Embodiments provide a method and apparatus for downcoverting the radio frequency signals using quadrature mixing to give inphase and quadrature components, and the inphase and quadrature components are filtered using a first bandpass filter bandwidth to give first bandpass filtered inphase and quadrature components and filtered using a second bandpass filter bandwidth, different from the first bandpass filter bandwidth, to give second bandpass filtered inphase and quadrature components. 1. A method of receiving data , the method comprising:downconverting a plurality of radio frequency signals using quadrature mixing to give inphase and quadrature components, the plurality of radio frequency signals having been transmitted using carrier aggregation, each radio frequency signal occupying a respective band of a plurality of radio frequency bands, the plurality of radio frequency bands being arranged in two groups separated in frequency by a first frequency region, the first of the two groups occupying a wider frequency region than the second group;filtering said inphase and quadrature components using a first bandpass filter bandwidth to give first bandpass filtered inphase and quadrature components; andfiltering said inphase and quadrature components using a second bandpass filter bandwidth, different from the first bandpass filter bandwidth, to give second bandpass filtered inphase and quadrature components.2. A method according to claim 1 , wherein the first frequency region comprises a radio frequency band occupied by a radio frequency signal that is not aggregated with one of said plurality of radio ...

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Номер записи: 31

06-06-2013 дата публикации

Systems and methods for configuring and operating a wireless control system in a vehicle for activation of a remote device

Номер: US20130142269A1

Автор: Todd R. Witkowski

Принадлежит: Johnson Controls Technology Co

Control systems for mounting in a vehicle are configured for transmitting a control signal to a receiver associated with a remote device. A control system receives a first control signal associated with a first transmission scheme. The system determines a bit pattern of the first control signal, and, based on the determined bit pattern, the system determines a second transmission scheme.

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Номер записи: 32

06-06-2013 дата публикации

Receiving Circuit, Method for Receiving a Signal, and Use of a Detection Circuit and a Control Circuit

Номер: US20130143508A1

Автор: BEYER Sascha, Ferchland Tilo, Hanusch Thomas

Принадлежит:

A receiving circuit, method for receiving a signal, and use of a detection circuit and a control circuit of a receiving circuit of a node of a radio network is provided to deactivate an analog signal processing and/or determination of digital data from a signal received over an antenna of the node, when a stored current frame of the digital data has been recognized as valid, and to activate the analog signal processing and/or the determination, when the transmission of the current frame over an interface of the control circuit has been confirmed, whereby the control circuit is connected to the detection circuit and/or an input circuit for deactivation and activation, and whereby the detection circuit is formed to determine the digital data from the received signal. 1. A receiving circuit of a node of a radio network , the receiving circuit comprising:an input circuit that is connectable to an antenna to receive a signal;an evaluation circuit that is connected downstream of the input circuit in the receive path, andwherein the input circuit is configured for analog signal processing with an analog-to-digital conversion of the received signal into a digital signal, andwherein the evaluation circuit is configured to evaluate the digital signal and has a detection circuit, a check circuit, and a control circuit, the detection circuit being configured to determine digital data from the digital signal, the check circuit being configured to save the digital data and to check a current frame of the digital data and to output at least one test signal based on the checking, and the control circuit being connected to the check circuit and a control input of the detection circuit and is formed to activate or deactivate the analog signal processing and/or the determination of the digital data by a control signal at the control input of the detection circuit and/or at a control input of the input circuit depending on the at least one test signal.2. The receiving circuit according ...

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Номер записи: 33

13-06-2013 дата публикации

RELIABLE COMMUNICATIONS FOR WIRELESS DEVICES

Номер: US20130149967A1

Автор: Lee Fred, Ma Dung

Принадлежит: Abbott Medical Optical Inc.

A method and apparatus for connectivity management of a wireless device is provided, such as a wireless medical device. The method comprises providing a wireless connection between at least two medical devices, the at least two medical devices comprising a primary medical device and a secondary medical device, causing the primary medical device to transmit and the secondary medical device to receive state signals wirelessly across a plurality of communication data channels, and reporting a non-active state for one of the plurality of data channels from the primary medical device to the secondary medical device using the plurality of communication data channels. 1. A method for managing communications between a plurality of medical devices , comprising:providing a wireless connection between at least two medical devices, the at least two medical devices comprising a primary medical device and a secondary medical device;causing the primary medical device to transmit and the secondary medical device to receive state signals wirelessly across a plurality of communication data channels; andreporting a non-active state for one of the plurality of data channels from the primary medical device to the secondary medical device using said plurality of communication data channels.2. The method of claim 1 , further comprising acting upon a non-active state by switching between communication data channels.3. The method of claim 1 , further comprising:generating status of the primary medical device by producing one or more state signals;reporting status of the primary medical device, said reporting indicating a current device state; andcommunicating primary medical device status by alternating transmission of device state information between a plurality of communication data channels.4. The method of claim 1 , wherein the primary medical device comprises an optical surgical device.5. The method of claim 3 , wherein reporting status comprises communicating at least one device state ...

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Номер записи: 34

20-06-2013 дата публикации

Rectifier, received signal strength indicator, and receiver

Номер: US20130156084A1

Автор: Chang Sub SHIN, Cheol Sig Pyo, Hoyong Kang, In Hwan Lee, Nguyen Trung KEIN, Se Han Kim, Tae Joon Park, Wun-Cheol Jeong

Принадлежит: Electronics and Telecommunications Research Institute ETRI

A received signal strength indicator is provided. The received signal strength indicator includes a plurality of differential amplifiers forming an amplifier chain for amplifying differential signals and a plurality of rectifiers for rectifying signals output from the plurality of differential amplifiers and the differential signals, and a low pass filter for combining the signals rectified by the plurality of rectifiers to output received signal strength. Each rectifier includes a class AB voltage-current converter for converting a differential voltage into a current, and two triode transistors.

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Номер записи: 35

20-06-2013 дата публикации

Spectrum Sensing Method, Apparatus, and System

Номер: US20130157580A1

Автор: Qiu Jing, Zhang Qian

Принадлежит: Huawei Technologies Co., Ltd.

A method for performing spectrum sensing by using correlation between channels, to reduce the sensing time and increase the throughput while satisfying requirements for sensing accuracy is provided. The method according to the embodiments of the present invention includes: obtaining correlation information between target channels; obtaining a spectrum sensing result of at least one of the target channels; and determining a sensing result of another target channel according to the spectrum sensing result of the at least one of the target channels and the correlation information between the target channels. 1. A spectrum sensing method comprising:obtaining correlation information between target channels;obtaining a spectrum sensing result of at least one of the target channels; anddetermining a sensing result of another target channel according to the spectrum sensing result of the at least one of the target channels and the correlation information between the target channels.2. The method according to claim 1 , wherein the correlation information between the target channels indicates similarity of spectrum usage between the target channels.3. The method according to claim 1 , wherein obtaining the spectrum sensing result of the at least one of the target channels comprises:directly performing spectrum sensing for the at least one of the target channels; orreceiving the spectrum sensing result of the at least one of the target channels sent by a sensing node, wherein the sensing node performs spectrum sensing for the at least one of the target channels.4. The method according to claim 3 , wherein performing the spectrum sensing for the at least one of the target channels comprises:selecting, according to the correlation information between the target channels, at least one target channel from the target channels for spectrum sensing;determining a sensing order of the selected target channels; andsensing the selected target channels according to the sensing order.5. ...

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Номер записи: 36

27-06-2013 дата публикации

EVALUATION UNIT AND A METHOD FOR DEMODULATION OF OFDM DATA

Номер: US20130163653A1

Автор: Feldhaus Gregor, HIRSCHMANN Susanne, WEISS Martin

Принадлежит: Rohde & Schwarz GmbH & Co. KG

The present disclosure provides an evaluation unit which includes a central data-processing unit, at least one storage unit and an allocation unit, wherein the allocation unit and the at least one storage unit () are connected to the central data-processing unit. The central data-processing unit loads at least one OFDM signal from the at least one storage unit and transfers this to the allocation unit. The allocation unit displays the individual signal spaces of the OFDM symbols of the at least one OFDM signal in a constellation diagram and in a frame-output matrix in such a manner that it is possible to allocate via the diagrams at which signal spaces data symbols and/or pilot symbols and/or zero symbols and/or don't care symbols are present and with which modulation type the data symbols and/or pilot symbols are modulated. 1. An evaluation unit , comprising:a central data-processing unit;at least one storage unit; andan allocation unit, wherein the allocation unit and the at least one storage unit are connected to the central data-processing unit,wherein the central data-processing unit loads at least one OFDM signal from the at least one storage unit and transfers it to the allocation unit, andwherein the allocation unit displays the individual signal spaces of OFDM symbols of the at least one OFDM signal in a constellation diagram and in a frame-output matrix in such a manner that it is possible to allocate via the constellation diagram and frame-output matrix, at which signal spaces data symbols and/or pilot symbols and/or zero symbols and/or don't care symbols are present and with which modulation type the data symbols and/or pilot symbols are modulated.2. The evaluation unit according to claim 1 , wherein the allocation unit draws a number of constellation circles in the constellation diagram corresponding to an allocated modulation type.3. The evaluation unit according to claim 2 , wherein radii of the constellation circles can be adjusted in such a manner ...

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Номер записи: 37

11-07-2013 дата публикации

Method and System for Multiple Frequency Hypothesis Testing With Full Synch Acquisition in an E-UTRA/LTE UE Receiver

Номер: US20130176941A1

Автор: KENT Mark, SWARTS Francis

Принадлежит: BROADCOM CORPORATION

A mobile device receives a radio frequency (RF) signal comprising a primary synchronization sequence (PSS) and a secondary synchronization sequence (SSS). The mobile device performs multiple frequency hypothesis (MFH) testing via multiple MFH branches. A SSS decoding and a PSS correlation process are performed, respectively, per MFH branch. The SSS decoding may be performed according to corresponding•PSS detection. Cell-specific information such as cell ID information and/or Cyclic Prefix (CP) length is acquired per MFH branch based on corresponding PSS detection and SSS decoding. Subsequently, the mobile device selects a particular MFH branch with a maximum PSS correlation peak over the entire MFH branches. The cell-specific information from the selected MFH branch is utilized for communications within a corresponding cell if the information is detected consistently. The mobile device compares cell ID information and/or CP length information over the remaining MFH branches for consistency check. 1. A methodreceiving cell-specific information from a plurality of multiple frequency hypothesis (MFH) branches, wherein the cell-specific information includes a plurality of cell ID information and a plurality of cyclic prefix (CP) length information for the MFH branches;selecting a first branch in the plurality of MFH branches based on a primary synchronization sequence (PSS) correlation peak magnitude of the first branch; anddetermining a confidence level in first cell ID information and first CP length information corresponding to the first branch by determining whether the first cell ID information and the first CP length information are consistent with the plurality of cell ID information and the plurality of CP length information.2. The method of claim 1 , wherein the first branch is selected based on determining that the first branch has a highest PSS correlation peak magnitude in the plurality of MFH branches.3. The method of claim 1 , wherein receiving the cell- ...

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Номер записи: 38

18-07-2013 дата публикации

METHOD AND APPARATUS FOR LOCATING FAULTS IN COMMUNICATIONS NETWORKS

Номер: US20130182753A1

Автор: Delforce Greg, Horsfield Brendan

Принадлежит:

The present invention relates to a device for the location of passive intermodulation faults in a coaxial cable network. The test apparatus () according to one embodiment of the present invention utilises a pair of high-power, frequency-synthesised, unmodulated RF carriers v(t) () and v(t) () are generated inside the HPA module of the apparatus. The power and frequency of v(t) () and v(t) () can be independently set to a range of values, v(t), v(t) are combined inside the instrument and then applied to the input of the device under test (DUT). The PIM signals () generated in the DUT are combined to produce the primary PIM signal v(t) (). The apparatus also includes two receivers () for the detection of v(t) and v(t) (). These signals are downconverted to 455 kHz. The two 455 kHz waveforms are digitised with a dual- channel A/D converter () and the amplitude ratio and phase offset between the digitised waveforms are calculated and stored. 1. A test apparatus , said apparatus including: a high power amplifier module for providing of a pair of test signals wherein at least one of the test signals is swept over a predetermined frequency range;', 'a combiner module for applying the test signals to a test medium; and', 'a primary receiver coupled to the combiner module for reception of a plurality of primary return signals produced by the test medium in response to the test signals;, 'a primary transceiver module includinga directional coupler module coupled between the combiner module and the test subject; a combiner module coupled to the directional coupler said directional coupler providing a pair of reference test signals corresponding to the pair of test signals produced by said high power amplifier module; and', 'a reference signal generator for producing a plurality of reference signals based on pair of reference test signals;, 'a reference signal generation module, said reference signal generation module includinga reference receiver coupled to the combiner module ...

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Номер записи: 39

25-07-2013 дата публикации

Power Detection Method and Related Communication Device

Номер: US20130188675A1

Автор: Chang Hsiang-Hui, Chen Hsin-Hung, Nalbantis Dimitris, Tenbroek Bernard Mark

Принадлежит: MEDIATEK INC.

A communication device with a power detection scheme is disclosed. The communication device includes a transmitter for transmitting an RF signal, a demodulator for demodulating the RF signal by utilizing a phase-modulated (PM) signal provided from the transmitter to generate a demodulated signal, a loopback circuit coupled between the transmitter and the demodulator for transmitting the RF signal and the PM signal from the transmitter to the demodulator when the power detection scheme is enabled, and a power detector for detecting power of the demodulated signal. 1. A communication device with a power detection scheme , comprising:a transmitter, for transmitting an RF signal;a demodulator, for demodulating the RF signal, by utilizing a phase-modulated (PM) signal provided from the transmitter, to generate a demodulated signal;a loopback circuit, coupled between the transmitter and the demodulator, for transmitting the RF signal and the PM signal from the transmitter to the demodulator when the power detection scheme is enabled; anda power detector, for detecting power of the demodulated signal.2. The communication device with a power detection scheme of claim 1 ,wherein the transmitter comprises:a phase modulator, for generating the PM signal according to a PM contented component;an amplitude modulator, for generating an amplitude modulated (AM) signal according to an AM contented component; anda first mixer, coupled to the phase modulator and the amplitude modulator, for upconverting the AM signal and the PM signal to generate the RF signal.3. The communication device with a power detection scheme of claim 2 , wherein the phase modulator comprises a phase-lock loop and the amplitude modulator comprises a digital-to-analog converter.4. The communication device with a power detection scheme of claim 2 ,wherein the transmitter comprises:a processor, for converting signals from a specific coordinate system into a polar coordinate system to obtain the PM contented ...

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Номер записи: 40

08-08-2013 дата публикации

MICROWAVE ANTENNA ALIGNMENT METHOD AND APPARATUS

Номер: US20130201855A1

Автор: CHEN Yi, Luo Xin, Lv Rui

Принадлежит: Huawei Technologies Co., Ltd.

The present invention discloses a microwave antenna alignment method and apparatus, relating to the field of communications technologies, and providing a clear instruction for antenna adjustment and implementing more convenient antenna alignment. The microwave antenna alignment method includes: performing vector subtraction for in-phase signals received by two sub-antennas within a same horizontal plane to obtain an azimuth plane vector difference, where an azimuth plane angular error signal includes the azimuth plane vector difference, and the azimuth plane angular error signal is used to reflect a deviation angle and direction of a received beam from the antenna direction within the horizontal plane; and aligning the antenna within the horizontal plane according to the azimuth plane angular error signal. 1. A microwave antenna alignment method , comprising:performing vector subtraction for in-phase signals received by two sub-antennas within a same horizontal plane to obtain an azimuth plane vector difference, wherein an azimuth plane angular error signal comprises the azimuth plane vector difference, and the azimuth plane angular error signal is used to reflect a deviation angle and direction of a received beam from an antenna direction within the horizontal plane; andaligning a microwave antenna within the horizontal plane according to the azimuth plane angular error signal.2. The microwave antenna alignment method according to claim 1 , whereinthe azimuth plane angular error signal further comprises:an azimuth plane vector difference obtained by performing vector subtraction for in-phase signals received by another two sub-antennas having a same symmetry axis as the two sub-antennas within the same horizontal plane;oran azimuth plane vector difference obtained by performing vector subtraction for in-phase signals received by another two sub-antennas having a same symmetry axis as the two sub-antennas within a different horizontal plane.3. The microwave antenna ...

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Номер записи: 41

15-08-2013 дата публикации

Systems Methods Circuits and Apparatus for Calibrating Wireless Communication Systems

Номер: US20130208774A1

Автор: Moshe Salhov, Roy Kinamon

Принадлежит: Go Net Systems Ltd

Disclosed are wireless communication systems and methods for calibrating same. The communication systems may include first wireless transceivers having: (a) a modem, and (b) one or more Radio Frequency (RF) chain pairs. There may also be included a sounding circuit block. A calibrated switchable bridging block (CSBB) may switchably couple signals between the first transceivers and the sounding circuit block. Calibration control logic may regulate signal flow through said CSBB during a sounding sequence of said first wireless transceiver and may apply compensation coefficients to RF compensation circuits functionally associated with said the wireless transceiver RF chain pairs.

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Номер записи: 42

15-08-2013 дата публикации

Test Signal in Receiver

Номер: US20130208776A1

Автор: Park Chester, Sundström Lars, Svensson Jim, Wilhelmsson Leif

Принадлежит: Telefonaktiebolaget lM Ericsson (publ)

The invention proposes a way of inserting an analog test signal during normal reception into analog blocks of an OFDM receiver in such a way that the reception is either not corrupted at all, or only very little. This is achieved either by inserting the analog test signal in time or frequency where it does not corrupt the received signal, or by accounting for the interfering analog test signal in the decoding process. 113-. (canceled)14. A method in an Orthogonal Frequency Division Multiplex (OFDM) receiver for determining properties of an analog block within the receiver , comprising:concurrently receiving a traffic signal and an analog test signal;adding the analog test signal to the traffic signal, thereby obtaining a combined test and traffic signal;providing the combined test and traffic signal to the analog block;extracting a modified combined test and traffic signal from the analog block;analyzing the modified combined test and traffic signal whereby a measure of the properties of the analog block is obtained.15. The method according to claim 14 , comprising determining a time point at which the analog test signal is to be added and wherein the addition of the analog test signal is performed at the determined time point.16. The method according to claim 15 , wherein the time point is during a Cyclic Prefix (CP) of the traffic signal.17. The method according to claim 14 , comprising determining a frequency at which the analog test signal is to be added claim 14 , and wherein the addition of the analog test signal is at the determined frequency.18. The method according to claim 17 , wherein the frequency of the analog test signal is outside the frequency range of the traffic signal.19. The method according to claim 18 , wherein the frequency of the analog test signal is close to the frequency range occupied by the traffic signal.20. The method according to claim 14 , wherein a time and a frequency for the addition of the analog test signal to the traffic signal ...

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Номер записи: 43

15-08-2013 дата публикации

Operational Status Indicators in an Optical Transceiver Using Dynamic Thresholds

Номер: US20130209090A1

Автор: HEIMBUCH Mark, ROPE Todd

Принадлежит:

Methods, architectures, circuits, and/or systems for monitoring operating parameters and/or generating status indications associated with electronic device operation are disclosed. The method can include (i) monitoring a first operating parameter related to operation of the electronic device to determine a first parameter value, (ii) calculating a difference between the first parameter value and a predetermined value for the first operating parameter, (iii) monitoring a second operating parameter on which thresholds for operational warnings and/or alarms are based to determine a second parameter value, (iv) updating or changing the thresholds based on a predetermined change or event in the second parameter value, (v) comparing the difference to the updated or changed thresholds, and (vi) generating a corresponding one of the operational warnings and/or alarms when the difference crosses at least one of the thresholds in a predetermined direction. 1. A method of monitoring one or more operating parameters in an electronic device , the method comprising:(a) storing a value of a first operating parameter during normal operation of said electronic device;(b) setting a target value for said first operating parameter based on said stored value;(c) determining a plurality of threshold values for said first operating parameter based on one or more acceptable variances of said target value;(d) monitoring said first operating parameter to determine whether monitored values of said first operating parameter crosses least one of said threshold values in a predetermined direction.2. The method of claim 1 , further comprising:(a) calculating a difference between one or more of said monitored values and one or more of said threshold values;(b) comparing said difference to said one or more of said threshold values; and(c) generating an operational warning and/or alarm when said one or more monitored values crosses said threshold values in said predetermined direction.3. The method ...

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Номер записи: 44

15-08-2013 дата публикации

MEASUREMENT APPARATUS AND MEASUREMENT METHOD

Номер: US20130210370A1

Автор: Misaki Yuji

Принадлежит: ANRITSU CORPORATION

The measurement apparatus includes a transmission and reception unit that receives a continuous test signal which is output from the mobile terminal and in which test signals based on the plurality of communication methods continue at predetermined time intervals, an acquisition section that sequentially acquires the test signals based on the plurality of communication methods included in the continuous test signal, a measurement section that sequentially measures the test signals acquired by the acquisition section a measurement result storage section that sequentially stores the data of the measurement result of the measurement section and a display unit that displays the data of the measurement result stored in the measurement result storage section 1. A measurement apparatus that measures an output signal in a test mode of a terminal to be tested capable of switching between a communication mode in which communication is performed according to a plurality of different communication methods and the test mode for testing communication characteristics in the communication mode , the measurement apparatus comprising:measurement item setting means for setting measurement items for each of the plurality of communication methods;measurement item information transmission means for transmitting information of set measurement items, which are set by the measurement item setting means, to the terminal to be tested so as to output continuous test signals, each of which is a signal that the terminal to be tested outputs on the basis of the information of the set measurement items in the test mode based on each of the communication methods, and in which a predetermined time gap is set between each of the test signals;continuous test signal receiving means for receiving the continuous test signal from the terminal to be tested; andmeasurement means for measuring characteristics of each of the test signals, which are included in the received continuous test signal, for the set ...

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Номер записи: 45

22-08-2013 дата публикации

PRECISION POWER/PEAK DETECTOR USING ON-CHIP REFERENCE POWER SOURCE

Номер: US20130217339A1

Автор: Asuri Bhushan Shanti

Принадлежит: QUALCOMM INCORPORATED

A wireless device is described. The wireless device includes a high precision power/peak detector. The wireless device also includes a reference signal source. The high precision power/peak detector and the reference signal source are on an integrated circuit. The reference signal source provides a precision reference signal used to calibrate the high precision power/peak detector. 1. A wireless device , comprising:a high precision power/peak detector; anda reference signal source, wherein the high precision power/peak detector and the reference signal source are on an integrated circuit, and wherein the reference signal source provides a precision reference signal used to calibrate the high precision power/peak detector.2. The wireless device of claim 1 , wherein the integrated circuit is a radio frequency integrated circuit.3. The wireless device of claim 1 , further comprising:a power amplifier; anda coupler, wherein the coupler is coupled to an output of the power amplifier, and wherein the coupler provides a feedback signal to the high precision power/peak detector.4. The wireless device of claim 1 , wherein the precision reference signal is provided to the high precision power/peak detector via a reference signal switch.5. The wireless device of claim 1 , wherein the high precision power/peak detector is calibrated to measure absolute power at an input.6. The wireless device of claim 1 , wherein the precision reference signal is independent of process claim 1 , temperature and frequency.7. The wireless device of claim 1 , wherein the high precision power/peak detector is used to detect an output power of the integrated circuit.8. The wireless device of claim 1 , wherein the high precision power/peak detector is used to detect a rejection of a duplexer on the wireless device in a Rx band.9. The wireless device of claim 1 , wherein the high precision power/peak detector is used to detect a rejection of a power amplifier on the wireless device in a Rx band.10. ...

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Номер записи: 46

29-08-2013 дата публикации

METHOD AND SYSTEM FOR ANTENNA ALIGNMENT

Номер: US20130225090A1

Автор: YI Xiongshu, Zhang Song

Принадлежит: Huawei Technologies Co., Ltd.

The present invention discloses a method and a system for antenna alignment. In the method and the system for antenna alignment in embodiments of the present invention, a strength value of an electromagnetic wave signal is determined in a receiving direction of an antenna to be aligned, and is displayed, so that a user performs an antenna alignment operation according to a display value, thereby improving precision in antenna alignment, and reducing difficulty and a cost in antenna alignment. 1. A method for antenna alignment , the method comprising:receiving, in a receiving direction of a first antenna, an electromagnetic wave signal transmitted by a second antenna;determining a strength value of the electromagnetic wave signal;converting the strength value into a display value within a predetermined range; anddisplaying the display value, so that a user determines, according to the display value, whether the first antenna is aligned with the second antenna.2. The method according to claim 1 , wherein the method further comprises:determining that a first power supply module of a communication device supplies power to the communication device comprising the first antenna, wherein a power supply voltage of the first power supply module is lower than a power supply voltage of a second power supply module of the communication device; andonly enabling a receiving function of the communication device among the receiving function and a transmitting function of the communication device, andthe receiving the electromagnetic wave signal transmitted by the second antenna comprises:receiving, through the receiving function of the communication device, the electromagnetic wave signal transmitted by the second antenna.5. A system for antenna alignment claim 1 , the system comprising a displaying module and a communication device having a first antenna claim 1 , wherein the communication device further comprises:a receiving unit, configured to receive, in a receiving direction of ...

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Номер записи: 47

29-08-2013 дата публикации

Method, Apparatus and Computer Program Product for Identifying Frequency Bands, and a Method, Apparatus and Computer Program Product for Evaluating Performance

Номер: US20130225105A1

Автор: Liang Ying Chang, Zeng Yong Hong

Принадлежит: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH

According to embodiments of the present invention, a method for identifying one or more frequency bands in a received signal. The method comprising: calculating a wavelet product of the received signal; setting a threshold for local maxima of the wavelet product; and detecting one or more edges in the received signal based on local maxima of the wavelet product which are greater than the threshold to identify one or more frequency bands in the received signal. A corresponding apparatus and computer program product are also provided. Embodiments also relate to a method for evaluating performance of a method for identifying one or more frequency bands in a received signal. A corresponding apparatus and computer program product are also provided. 1. A method for identifying one or more frequency bands in a received signal , the method comprising:a. calculating a wavelet product of the received signal;b. setting a threshold for local maxima of the wavelet product; andc. detecting one or more edges in the received signal based on local maxima of the wavelet product which are greater than the threshold to identify one or more frequency bands in the received signal.3. The method of or , further comprising normalizing the wavelet product.4. The method of claim 3 , wherein the wavelet product is normalized by a mean power spectral density of the received signal.5. The method of claim 4 , wherein the normalized wavelet product is:{'br': None, 'i': F', 'n', 'F', 'n, 'sub': 'N', 'sup': 'J', '()=|()|/Δ.'}where Δ is the mean power spectral density of the received signal.6. The method of any preceding claim claim 4 , wherein a fixed threshold is set for a given fast Fourier transform size and sample size of the received signal.7. The method of any preceding claim claim 4 , further comprising calculating a mean power spectral density for an identified frequency band.9. The method of or claim 4 , further comprising detecting if the identified frequency band is being used based on a ...

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Номер записи: 48

05-09-2013 дата публикации

METHOD AND APPARATUS FOR GENERATING A METRIC FOR USE IN ONE OR MORE OF LOCK DETECTION, SNR ESTIMATION, AND MODULATION CLASSIFICATION

Номер: US20130230085A1

Автор: Linn Yair

Принадлежит:

The present disclosure is directed at a method and apparatus for generating a metric for use in any one or more of lock detection, SNR estimation, and modulation classification. To generate the metric, an input angle in the form of a symbol phase or a difference in symbol phases is used to evaluate a base function. The base function relates possible metrics to possible input angles using a triangle wave having its maxima or minima at ideal input angles, and the other of its maxima or minima at angles midway the ideal input angles. Described are embodiments that are one or more of non-data aided; that may be implemented relatively efficiently in hardware; that can function using one sample/symbol; that can achieve relatively good detection certainty using relatively few estimates; and that can be used to implement modulation classifiers, lock detectors, and SNR estimators that are resilient to imperfections in automatic gain control. 1. A method for generating a metric for one or both of lock detection and signal-to-noise ratio (SNR) estimation , the method comprising:(a) obtaining a baseband symbol from a received carrier that is modulated using the symbol according to a modulation order (M) equaling the number of distinct ideal symbol phases used to modulate the received carrier;(b) determining a received phase of the symbol; and(c) generating the metric from the received phase, wherein possible metrics depend on possible received phases according to a base function that comprises a triangle wave having its maxima or minima located at ideal symbol phases and the other of its maxima or minima located at phases midway between adjacent ideal symbol phases.2. The method as claimed in wherein the maxima and minima have identical absolute values.3. The method as claimed in claim 1 , wherein the received carrier is modulated according to M-ary phase shift keying.4. The method as claimed in wherein M is a positive integer power of 2.5. The method as claimed in claim 1 , ...

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Номер записи: 49

05-09-2013 дата публикации

METHOD AND SYSTEM FOR ANTENNA SELECTION DIVERSITY WITH BIASING

Номер: US20130230087A1

Автор: Hoo Min Chuin, Moorti Rajendra Tushar, Trachewsky Jason Alexander

Принадлежит: BROADCOM CORPORATION

A signal quality metric is determined for each of multiple signal paths. Each of the signal paths corresponds to a respective antenna. The determined signal quality metric is modified for one or more signal paths. A subset of the signal paths is selected for receiving a signal based at least in part on the determined signal quality metrics. The selecting is biased based at least in part on the modified signal quality metrics. 136-. (canceled)37. A method , comprising:determining a signal quality metric for each of a plurality of signal paths, each of the plurality of signal paths corresponding to a respective one of a plurality of antennas;modifying the determined signal quality metric for one of the plurality of signal paths; andselecting a subset of the plurality of signal paths for receiving a signal based at least in part on the determined signal quality metrics, the selecting being biased based at least in part on the modified signal quality metric.38. The method of claim 37 , wherein the signal quality metric comprises a signal-to-interference ratio.39. The method of claim 37 , wherein the signal quality metric comprises a power level characteristic.40. The method of claim 37 , wherein the signal quality metric comprises a packet error rate characteristic.41. The method of claim 37 , wherein the signal quality metric comprises a bit error rate characteristic.42. The method of claim 37 , wherein the signal quality metric comprises a propagation channel characteristic.43. The method of claim 37 , further comprising cycling through at least one of the plurality of signal paths.44. The method of claim 37 , wherein the modifying comprises increasing the determined signal quality metric for the one of the plurality of signal paths by a fixed amount or a predetermined amount.45. The method of claim 37 , wherein the modifying comprises dynamically changing the determined signal quality metric for the one of the plurality of signal paths.46. The method of claim 37 , ...

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Номер записи: 50

05-09-2013 дата публикации

Electromagnetic Noise Evaluation System, Electromagnetic Environment Evaluation System And Program

Номер: US20130231062A1

Автор: NAKAMURA Satoshi, Noma Tatsuji, YAHAGI Yasuo

Принадлежит: Hitachi, Ltd.

There are cases where electromagnetic waves radiated from a device influence another device, whereby the operation of the other device becomes unstable. The present invention provides a system having a detailed database of a device that radiates electromagnetic waves, so that a spatial distribution of electromagnetic waves radiated from an electric/electronic device can be computed, and the influence of the electromagnetic waves on another electric/electronic device can be evaluated. 1. An electromagnetic noise evaluation system comprising:a first information database that has stored therein an operating condition and an electromagnetic wave sensing property of a first electric/electronic device and;a second information database that has stored therein radiation information on at least one second electric/electronic device that radiates electromagnetic waves; anda control device,wherein the control device executesa first process of computing propagation of electromagnetic waves radiated from the second electric/electronic device on the basis of information on a used area of the first electric/electronic device, three-dimensional position information about arrangement of the first electric/electronic device, and three-dimensional position information on the second electric/electronic device,a second process of computing electromagnetic wave power received at each position in a three-dimensional space in which the first electric/electronic device is arranged,a third process of extracting from the first information database a data error rate corresponding to the received electromagnetic wave power computed for each position, anda fourth process of outputting a region where the data error rate is above a desired data error rate in association with each position of the used area.2. The electromagnetic noise evaluation system according to claim 1 , wherein the second information database has data on an antenna model created on the basis of a housing configuration claim 1 ...

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Номер записи: 51

12-09-2013 дата публикации

METHOD AND SYSTEM FOR ANTENNA SWITCHING

Номер: US20130235914A1

Автор: Duenyas Izhak

Принадлежит: SPARKMOTION INC.

A client terminal, such as a customer premises equipment (CPE), for receiving a communication signal in a plurality of reception configurations. The client terminal comprises an antenna unit having a plurality of reception configurations for receiving communication signal having a plurality of frames, each the frame having a predefined frame segment, a receiver, a switching module configured for switching between operational and testing receptions of the communication signal respectively by the receiver via the antenna unit in operational and testing configurations, and a timing circuit configured for timing the switching during the operational reception to allow the receiver to receive the testing reception when the predefined frame segment is received via the antenna unit in operational configuration. 1. A method for receiving a communication signal communication signal via a plurality of antennas , comprising:using an operational connection between a receiver and an operational antenna to allow said receiver to receive a communication signal having a plurality of frames separately via said operational connection;switching to a tested connection between a tested antenna and said receiver to allow said receiver to receive a predefined frame segment from one of said plurality of frames separately via said tested connection when said operational antenna is receiving said predefined frame segment;performing a quality analysis of said tested connection; andselecting between said operational and tested connections according to said quality analysis.2. A client terminal for receiving a communication link , comprising:an antenna unit having a plurality of reception configurations and configured for receiving a communication link having a plurality of frames, each said frame having a predefined frame segment;a receiver;a switching module communicatively coupled with the antenna unit and the receiver, which switches the antenna unit between any of the plurality of reception ...

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Номер записи: 52

12-09-2013 дата публикации

Method, System, and Computer Program Product for Optimizing Signal Quality of a Composite Received Signal

Номер: US20130237168A1

Автор: Frerking Melvin D., Lewis John E., Shively David G.

Принадлежит: AT&T MOBILITY II LLC

Signal quality of a composite received signal in a radio communication network is optimized by adjusting a phase offset between received and/or transmitted signals based on signal quality parameters of the received and/or transmitted signals. The phase offset is adjusted by varying the phase offset between the received or transmitted signals such that that the composite signal is circularly, elliptically, or linearly polarized. The phase offset between the received or transmitted signals is continually adjusted based on the received signal quality parameters. 1. A method , comprising:obtaining data representing signal quality parameters of received signals; andcontinually adjusting, by a processor, a phase offset of the received signals based on the obtained data such that a composite signal, formed from the received signals, has an optimized signal quality, wherein in adjusting the phase offset, a polarization of the composite signal is continually adjusted between circular polarization, elliptical polarization, and linear polarization.2. The method of claim 1 , further comprising transmitting adjusted signals to a base station receiver.3. The method of claim 1 , wherein the composite signal is formed at a base station receiver.4. The method of claim 1 , wherein the phase offset is adjusted at a base station receiver.5. The method of claim 1 , wherein the data representing signal quality parameters is obtained by interrogating a base station receiver or a wireless transmission device.6. The method of claim 1 , wherein the data representing the signal quality parameters is obtained by monitoring signal quality of data received by a base station receiver.7. The method of claim 1 , wherein the data representing the signal quality parameters is obtained by monitoring signal quality of data transmitted by a wireless device.8. A system claim 1 , comprising:a processor; and obtaining data representing signal quality parameters of received signals; and', 'continually ...

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Номер записи: 53

19-09-2013 дата публикации

SYSTEM AND METHOD FOR RECEIVED CHANNEL POWER INDICATOR (RCPI) MEASUREMENT

Номер: US20130242876A1

Автор: Dick Stephen G., Kwak Joseph A.

Принадлежит:

A received channel power indicator (RCPI) value is used as a measure of the received RF power in the selected channel, measured at the antenna connector. This parameter is a measure by the PHY sublayer of the received RF power in the channel measured over the PLCP preamble and over the entire received frame. RCPI is a monotonically increasing, logarithmic function of the received power level defined in dBm. 1. A method for receiving a received channel power indicator (RCPI) at an access point (AP) , the method comprising:transmitting a wireless signal;receiving an n-bit RCPI parameter that is based on a measured radio frequency power of the wireless signal at a wireless transmit receive unit (WTRU) having a monotonically increasing logarithmic function, wherein n is a positive integer.2. The method of wherein the measured radio frequency power of the wireless signal is defined in dBm.3. The method of wherein the n-bit RCPI parameter is an 8 bit RCPI parameter.4. The method of wherein the n-bit RCPI parameter is determined as a scalar value in a range of 0 through 220.5. The method of wherein the measured radio frequency power of the wireless signal is rounded to a nearest 0.5 dB.6. The method of wherein the range used for the scalar value includes a 0 scalar value that corresponds to a power less than −110 dBm and a 220 scalar value that corresponds to a power greater than −0 dBm.7. The method of wherein the measured radio frequency power of the wireless signal is measured to an accuracy of +/−5 dB.8. A wireless access point (AP) comprising:a transmitter configured to transmit a wireless signal;a receiver configured to receive an n-bit received channel power indicator (RCPI) parameter that is based on a measured radio frequency power of the wireless signal at a wireless transmit receive unit (WTRU) having a monotonically increasing logarithmic function, wherein n is a positive integer.9. The AP of wherein the measured radio frequency power of the wireless signal is ...

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Номер записи: 54

19-09-2013 дата публикации

Mechanism for Measuring Transmitter Impairments Using Offset Local Oscillators

Номер: US20130243057A1

Автор: Behnke Christopher J., Dark Stephen L.

Принадлежит: National Instruments Corporation

Systems and methods for measuring transmitter and/or receiver I/Q impairments are disclosed, including iterative methods for measuring transmitter I/Q impairments using shared local oscillators, iterative methods for measuring transmitter I/Q impairments using intentionally-offset local oscillators, and methods for measuring receiver I/Q impairments. Also disclosed are methods for computing I/Q impairments from a sampled complex signal, methods for computing DC properties of a signal path between the transmitter and receiver, and methods for transforming I/Q impairments through a linear system. 1. A method for determining I/Q impairments of a transmitter , the method comprising: (a) supplying a pre-compensation transformation to a pre-compensation circuit of the transmitter, wherein the pre-compensation circuit is configured to apply the pre-compensation transformation to a complex exponential tone in order to obtain an adjusted complex signal, wherein the complex exponential tone is at frequency f, wherein the pre-compensation transformation is configured to pre-compensate for a current estimate of the I/Q impairments of the transmitter, wherein the transmitter is configured to transmit a transmit signal based on the adjusted complex signal, wherein a receiver is configured to receive the transmit signal and to capture a sampled complex signal representing the received transmit signal;', '(b) computing raw I/Q impairments at frequency f based on a frequency-shifted signal, wherein the frequency-shifted signal is a result of frequency shifting the sampled complex signal by the amount ΔLO;', '(c) removing a current estimate of a signal path from the raw I/Q impairments at frequency f to obtain path-compensated I/Q impairments at frequency f, wherein the signal path includes a path from an I/Q modulator of the transmitter to a demodulator of the receiver; and', '(d) updating the current estimate of the I/Q impairments of the transmitter at frequency f based on the ...

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Номер записи: 55

19-09-2013 дата публикации

Mechanism for Measuring Transmitter I/Q Impairments Using Shared Local Oscillators

Номер: US20130243058A1

Автор: Dark Stephen L.

Принадлежит: National Instruments Corporation

Systems and methods for measuring transmitter and/or receiver I/Q impairments are disclosed, including iterative methods for measuring transmitter I/Q impairments using shared local oscillators, iterative methods for measuring transmitter I/Q impairments using intentionally-offset local oscillators, and methods for measuring receiver I/Q impairments. Also disclosed are methods for computing I/Q impairments from a sampled complex signal, methods for computing DC properties of a signal path between the transmitter and receiver, and methods for transforming I/Q impairments through a linear system. 1. A method for determining I/Q impairments of a transmitter , the method comprising: (a) supplying a pre-compensation transformation to a pre-compensation circuit of the transmitter, wherein the pre-compensation circuit is configured to apply the pre-compensation transformation to a complex exponential tone to obtain an adjusted complex signal, wherein the complex exponential tone is at frequency f, wherein the pre-compensation transformation is configured to pre-compensate for a current estimate of the I/Q impairments of the transmitter, wherein the transmitter is configured to transmit a transmit signal based on the adjusted complex signal, wherein a receiver is configured to receive the transmit signal and capture a sampled complex signal representing the received transmit signal;', '(b) computing raw I/Q impairments based on the sampled complex signal;', '(c) transforming the raw I/Q impairments to determine transformed I/Q impairments, wherein said transforming removes measured I/Q impairments of the receiver from the raw I/Q impairments;', '(d) updating the current estimate of the I/Q impairments of the transmitter based on path-compensated I/Q impairments, wherein the path-compensated I/Q impairments are obtained by removing a current estimate of a signal path from the transformed I/Q impairments, wherein the signal path includes a path from an I/Q modulator of the ...

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Номер записи: 56

19-09-2013 дата публикации

Mechanisms for Measuring the I/Q Impairments of a Receiver

Номер: US20130243059A1

Автор: Behnke Christopher J., Dark Stephen L.

Принадлежит: National Instruments Corporation

Systems and methods for measuring transmitter and/or receiver I/Q impairments are disclosed, including iterative methods for measuring transmitter I/Q impairments using shared local oscillators, iterative methods for measuring transmitter I/Q impairments using intentionally-offset local oscillators, and methods for measuring receiver I/Q impairments. Also disclosed are methods for computing I/Q impairments from a sampled complex signal, methods for computing DC properties of a signal path between the transmitter and receiver, and methods for transforming I/Q impairments through a linear system. 1. A computer-implemented method for determining I/Q impairments of a receiver , the method comprising:supplying an input signal to the receiver, wherein the input signal includes an isolated tone at displacement frequency f and includes a void interval around displacement frequency −f, wherein the receiver is configured to demodulate the input signal in order to obtain a sampled complex signal, wherein displacement frequencies f and −f are displacements relative to a local oscillator frequency of the receiver; andcomputing the I/Q impairments of the receiver at frequency f based on the sampled complex signal.2. The method of claim 1 , further comprising:repeating said supplying and said computing for values of the frequency f spanning a specified frequency band; andstoring the I/Q impairments of the receiver for said values of the frequency fin a memory.3. The method of claim 1 , wherein the input signal is supplied by a transmitter whose local oscillator frequency is offset by a non-zero value from the local oscillator frequency of the receiver.4. The method of claim 1 , wherein the input signal is supplied by a calibration tone synthesizer.5. The method the claim 1 , wherein said computing the I/Q impairments of the receiver at frequency f includes:{'sub': 'I', 'computing a transform value Cat frequency f of an I component of the sampled complex signal;'}{'sub': 'Q', ' ...

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Номер записи: 57

19-09-2013 дата публикации

Mechanism for the Measurement of DC Properties of a Signal Path

Номер: US20130243061A1

Автор: Dark Stephen L.

Принадлежит: National Instruments Corporation

Systems and methods for measuring transmitter and/or receiver I/Q impairments are disclosed, including iterative methods for measuring transmitter I/Q impairments using shared local oscillators, iterative methods for measuring transmitter I/Q impairments using intentionally-offset local oscillators, and methods for measuring receiver I/Q impairments. Also disclosed are methods for computing I/Q impairments from a sampled complex signal, methods for computing DC properties of a signal path between the transmitter and receiver, and methods for transforming I/Q impairments through a linear system. 1. A computer-implemented method for estimating a DC scaling of a signal path between an I/Q modulator of a transmitter and a demodulator of a receiver , the method comprising:receive a first response signal that has been captured from the I/Q demodulator in response to a transmitter supplying a zero signal as input to the I/Q modulator;receive a second response signal that has been captured from the demodulator in response to the transmitter supplying a constant signal as input to the I/Q modulator, wherein the constant signal equals a non-zero complex constant;averaging the first response signal to obtain a first average and averaging the second response signal to obtain a second average; andcomputing the DC scaling based on a difference value and the non-zero complex constant, wherein the difference value is a difference between the second average and the first average.2. The method of claim 1 , further comprising:computing a DC rotation of the signal path based on a phase of the difference value and a phase of the non-zero complex constant.3. The method of claim 2 , wherein the DC scaling and DC rotation are usable to remove an effect of the signal path from measured I/Q impairments at the receiver in order to obtain estimates of the I/Q impairments of the transmitter.4. The method of claim 1 , wherein the signal path includes a cable coupling between the transmitter and ...

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Номер записи: 58

19-09-2013 дата публикации

Testing Method Detecting Incorrectly Connected Antenna Contacts

Номер: US20130244583A1

Автор: DHAYNI Achraf

Принадлежит: ST-Ericsson SA

The invention concerns a testing method detecting misconnected mechanical contacts between off-chip antenna and on-chip antenna circuit, wherein the testing method is a Built-In Self-Test method including a step of measuring at least one electrical parameter of on-chip antenna circuit connected to off-chip antenna which is representative of state of connection of said mechanical contacts. 1. A testing method detecting misconnected mechanical contacts between an off-chip antenna and an on-chip antenna circuit , wherein the testing method is a Built-In Self-Test method including a step of measuring at least one electrical parameter of the on-chip antenna circuit connected to the off-chip antenna which is representative of the state of connection of said mechanical contacts.2. A testing method according to claim 1 , wherein said electrical parameter is at least part of a transfer function of the on-chip antenna circuit connected to the off-chip antenna.3. A testing method according to claim 2 , wherein the testing method includes a step of evaluating the quality factor and/or the resonance frequency of the on-chip antenna circuit connected to off-chip antenna claim 2 , from the measured transfer function.4. A testing method according to claim 3 , wherein the testing method includes a step of evaluating the quality factor and the resonance frequency of the on-chip antenna circuit connected to the off-chip antenna claim 3 , from the measured transfer function.5. A testing method according to claim 2 , wherein said measuring step includes a substep of generating and sweeping carrier frequencies over a predetermined frequency range at an input of a transmitter of the on-chip antenna circuit and a substep of measuring an electrical signal amplitude at an output of a receiver of the on-chip antenna circuit.6. A testing method according to claim 5 , wherein the substep of sweeping carrier frequencies claim 5 , is performed over a frequency range that is broader than the ...

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Номер записи: 59

26-09-2013 дата публикации

OPTICAL POWER MONITOR, OPTICAL POWER CONTROL SYSTEM AND OPTICAL POWER MONITOR METHOD

Номер: US20130251365A1

Автор: Aoki Yasuhiko, ODA Shoichiro, SONE Kyosuke, Tanaka Toshiki, Tanimura Takahito

Принадлежит: FUJITSU LIMITED

An optical power monitor that detects optical power of respective wavelengths of a signal light in a wavelength multiplexing system, includes: a light emitter configured to superimpose a frequency modulation component on a signal light; a wavelength tunable filter configured to sweep a pass band of the signal light across a wavelength band for a signal light; and a detector configured to detect intensity changes in optical power passing through the wavelength tunable filter with a frequency modulation of the optical power, and to detect an optical power measurement value at a middle point of two points of the intensity changes of the optical power as the optical power of a wavelength to be measured. 1. An optical power monitor that detects optical power of respective wavelengths of a signal light in a wavelength multiplexing system , comprising:a light emitter configured to superimpose a frequency modulation component on a signal light;a wavelength tunable filter configured to sweep a pass band of the signal light across a wavelength band for a signal light; anda detector configured to detect intensity changes in optical power passing through the wavelength tunable filter with a frequency modulation of the optical power, and to detect an optical power measurement value at a middle point of two points of the intensity changes of the optical power as the optical power of a wavelength to be measured.2. The optical power monitor according to claim 1 ,wherein the frequency modulation component is obtained by applying a sinusoidal frequency control signal on a light source with a variable oscillation frequency provided in the light emitter.3. The optical power monitor according to claim 1 ,wherein the frequency modulation component is obtained by superimposing a sinusoidal signal on a drive signal of an optical modulator for data signal modulation provided in the light emitter.4. An optical power control system comprising:an optical power monitor configured to detect ...

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Номер записи: 60

10-10-2013 дата публикации

APPARATUS FOR ANALYZING INTERFERENCE OF WIRELESS COMMUNICATION DEVICE, AND SYSTEM AND METHOD FOR ANALYZING INTERFERENCE USING THE SAME

Номер: US20130265893A1

Автор: CHOI Su Na, CHOI Sung Woong, JEON Sang Bong, PARK Seung Keun

Принадлежит: Electronics and Telecommunications Research Institute

An apparatus for analyzing interference of a wireless communication device includes a frequency detector configured to detect a frequency signal in a low frequency band that is generated in a wireless communication device; and a band-pass filter configured to extract an interference signal reflecting auditory sensitivity at each frequency, in an audible frequency band of the detected frequency signal. Further, the apparatus includes a voltmeter configured to measure a magnitude of the extracted interference signal at each frequency; and an interference determination block configured to determine whether there is an influence of interference of the wireless communication device on an audio device by comparing an interference level of the measured interference signal with a preset interference reference value. 1. An apparatus for analyzing interference of a wireless communication device , comprising:a frequency detector configured to detect a frequency signal in a low frequency band that is generated in a wireless communication device;a band-pass filter configured to extract an interference signal reflecting auditory sensitivity at each frequency, in an audible frequency band of the detected frequency signal;a voltmeter configured to measure a magnitude of the extracted interference signal at each frequency; andan interference determination block configured to determine whether there is an influence of interference of the wireless communication device on an audio device by comparing an interference level of the measured interference signal with a preset interference reference value.2. The apparatus of claim 1 , wherein the band-pass filter is configured to apply a weighting value for the auditory sensitivity that varies depending on an application environment of the wireless communication device.3. The apparatus of claim 1 , wherein the interference determination block is configured to determine that there is an influence of the interference of the wireless ...

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Номер записи: 61

17-10-2013 дата публикации

SYSTEM AND METHOD PROVIDING DATA EXCHANGE WITH A MEDICAL DEVICE FOR REMOTE PATIENT CARE

Номер: US20130271279A1

Автор: Manicka Yatheendhar D., Mazar Scott T.

Принадлежит: Cardiac Pacemakers, Inc.

A system for relaying data to a repository from a medical device is disclosed. A receiver is configured to receive data from a medical device, where the data can be an indication of a problem with the medical device. A memory is configured to maintain the data once it has been received. A transmission device is configured to send the data to a data repository over a communication medium. A detector is configured to detect conditions of the communication medium that could affect data exchange and send the data based at least in part on the conditions. A processor is configured to send at least a portion of the data based at least in part on a degree of urgency. 1. A system for relaying data to a repository from a medical device , comprising:a receiver configured to receive data from a medical device, wherein the data comprises indication of a problem with the medical device;a memory configured to maintain the data once it has been received;a transmission device configured to send the data to a data repository over a communication medium; anda detector configured to detect conditions of the communication medium that could affect data exchange and send the data based at least in part on the conditions,a processor configured to send at least a portion of the data based at least in part on a degree of urgency.2. The system of claim 1 , wherein the problem with the medical device comprises a broken cardiac lead.3. The system of claim 1 , wherein the transmission device is configured to send the data to a data repository over a communication medium comprising a telephone line.4. The system of claim 3 , wherein the detector is configured to detect conditions of the communication medium that could affect exchange comprising the telephone line being in-use.5. The system of claim 1 , wherein the receiver is configured to receive data from the medical device through inductive coupling.6. The system of claim 1 , further comprising an interface configured to receive the degree of ...

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Номер записи: 62

17-10-2013 дата публикации

Method for testing an amplification path for telecommunications satellite repeater

Номер: US20130272152A1

Автор: Alessandro LE PERA, Frederic Piro

Принадлежит: EUTELSAT SA

A method for testing an amplification path of a repeater for a satellite for broadcasting the usable signals, the amplification path making it possible to frequency amplify usable signals from a plurality of communications channels, the channels being situated in a first frequency band, the amplification path being adapted to the first band, wherein the satellite includes a signal generator of a subsystem that enables generation of telemetry data to a second transmission antenna for reception thereof on Earth, the method including defining a test signal that includes the selection of a carrier frequency situated in the first frequency band; configuring the repeater to enable transmission of the signal generated by the signal generator to the amplification path; switching of the test signal amplified via the amplification path to the second transmitting antenna.

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Номер записи: 63

17-10-2013 дата публикации

Method And Apparatus For Evaluating And Optimizing A Signaling System

Номер: US20130272360A1

Автор: Chau Pak Shing, Stonecypher William Franklin, Zerbe Jared

Принадлежит:

A method and apparatus for evaluating and optimizing a signaling system is described. A pattern of test information is generated in a transmit circuit of the system and is transmitted to a receive circuit. A similar pattern of information is generated in the receive circuit and used as a reference. The receive circuit compares the patterns. Any differences between the patterns are observable. In one embodiment, a linear feedback shift register (LFSR) is implemented to produce patterns. An embodiment of the present disclosure may be practiced with various types of signaling systems, including those with single-ended signals and those with differential signals. An embodiment of the present disclosure may be applied to systems communicating a single bit of information on a single conductor at a given time and to systems communicating multiple bits of information on a single conductor simultaneously. 1. An integrated circuit , comprising:circuitry to generate a repeating pattern signal during a test mode;a transmitter to serially transmit a signal to a receiver, the signal comprising a data signal during a normal mode and the repeating pattern signal during the test mode; andcircuitry to change during the test mode at least one parameter affecting transmission of the signal to the receiver, such that the repeating pattern signal is serially transmitted using alternate values of the at least one parameter.2. The integrated circuit of claim 1 , where the at least one parameter includes at least one of a timing parameter of the transmitter or a voltage parameter influencing ability to distinguish logic levels of the data signal at the receiver.3. The integrated circuit of claim 1 , where the at least one parameter comprises a timing offset relative to a timing reference claim 1 , the timing offset used by the transmitter to serially transmit the data signal.4. The integrated circuit of claim 3 , where the circuitry to change the at least one parameter during the test mode ...

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Номер записи: 64

17-10-2013 дата публикации

Method And Apparatus For Evaluating And Optimizing A Signaling System

Номер: US20130272361A1

Автор: Chau Pak Shing, Stonecypher William Franklin, Zerbe Jared

Принадлежит:

A method and apparatus for evaluating and optimizing a signaling system is described. A pattern of test information is generated in a transmit circuit of the system and is transmitted to a receive circuit. A similar pattern of information is generated in the receive circuit and used as a reference. The receive circuit compares the patterns. Any differences between the patterns are observable. In one embodiment, a linear feedback shift register (LFSR) is implemented to produce patterns. An embodiment of the present disclosure may be practiced with various types of signaling systems, including those with single-ended signals and those with differential signals. An embodiment of the present disclosure may be applied to systems communicating a single bit of information on a single conductor at a given time and to systems communicating multiple bits of information on a single conductor simultaneously. 1. An integrated circuit to connect to an electrical conductor coupling the integrated circuit with a transmitter , the integrated circuit comprising:circuitry to generate a repeating pattern signal during a test mode;a receiver to serially receive a signal via the electrical conductor from the transmitter, the signal comprising a data signal during a normal mode and a repeating test pattern during the test mode;circuitry to change during the test mode at least one parameter affecting reception of the signal from the transmitter, such that the repeating test pattern from the transmitter is received using alternate values of the at least one parameter; andcircuitry to compare the repeating pattern signal generated by the circuitry to generate with the repeating test pattern serially received by the receiver during the test mode, to generate a comparison output.2. The integrated circuit of claim 1 , where the at least one parameter includes at least one of a timing reference used by the receiver to sample the signal and a voltage threshold used to distinguish logic levels of ...

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Номер записи: 65

24-10-2013 дата публикации

RADIO RELAY STATION APPARATUS, RADIO BASE STATION APPARATUS AND RADIO COMMUNICATION METHOD

Номер: US20130279364A1

Автор: kusume Katsutoshi, Nagata Satoshi, Taoka Hidekazu, Weitkemper Petra

Принадлежит: NTT DOCOMO, INC.

Provided are a radio relay station apparatus, a radio base station apparatus and a radio communication method capable of improving user throughput and increasing the capacity in type II relay. The radio communication method of the present invention is characterized by, in a radio relay station apparatus, measuring channel quality of relay links with use of sounding reference signals from mobile terminal apparatuses; and transmitting feedback information including measurement results of channel quality of the relay links to a radio base station apparatus via a backhaul link; in the radio base station apparatus, measuring channel quality of direct links with use of sounding reference signals from the mobile terminal apparatuses, subtracting a correction value from the measurement results of the radio relay station apparatus; and allocating radio resources to a mobile terminal apparatus based on measurement results of the channel quality of the direct links and subtraction results. 1. A radio relay station apparatus comprising:a receiving section configured to receive a sounding reference signal from a mobile terminal apparatus;a channel quality measuring section configured to measure channel quality of a relay link with use of the sounding reference signal; anda transmitting section configured to transmit feedback information including a measurement result of the channel quality of the relay link to a radio base station apparatus via a backhaul link.2. The radio relay station apparatus of claim 1 , wherein the feedback information includes a precoding matrix indicator of the relay link.3. The radio relay station apparatus of claim 1 , wherein the feedback information includes information of a relay type.4. A radio base station apparatus comprising:a receiving section configured to receive sounding reference signals from mobile terminal apparatuses and to receive feedback information including measurement results of channel quality of relay links from a radio relay ...

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Номер записи: 66

24-10-2013 дата публикации

Assessing Aircraft Interference Path Loss Employing Discrete Frequency Stirring

Номер: US20130281027A1

Автор: Horton Nathaniel Thomas, Kirchoff Kenneth Patrick, Lewis Dennis Michael

Принадлежит:

A method for accessing aircraft interference path loss in an aircraft. A plurality of radio frequency signals that are stepped through a plurality of frequencies in a frequency range is transmitted from a plurality of locations within an interior of the aircraft. Radio frequency signals present at a receive antenna are received in response to transmitting the plurality of radio frequency signals to form a plurality of measurements. An average of averages curve is generated from the plurality of measurements. A peak to average ratio is identified. Field uniformity is identified. A standard error for the average of averages curve is determined. An upper bound for the aircraft interference path loss in the aircraft is predicted using the average of averages curve, the peak to average ration, the field uniformity, and the standard error. 110-. (canceled)11. A method for identifying attenuation within a structure , the method comprising:transmitting a plurality of electromagnetic signals that are stepped through a plurality of frequencies in a frequency range from a plurality of locations within the structure,measuring electromagnetic signals received at a receiver in response to transmitting the plurality of electromagnetic signals to form a plurality of measurements;performing a statistical analysis using the plurality of measurements to form a result; andpredicting a set of attenuations for the structure using the result.12. The method of claim 11 , wherein the transmitting step comprises:broadcasting a radio frequency signal at a frequency from a location within the plurality of locations;incrementing the frequency by a step size to form a new frequency within the plurality of frequencies;transmitting a new radio frequency signal from the location at the new frequency within the plurality of locations;repeating the incrementing and transmitting step until the plurality of frequencies has been used to transmit the new radio frequency signal; andrepeating the ...

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Номер записи: 67

24-10-2013 дата публикации

Receiving apparatus, frequency deviation calculating method, and medium storing computer program therein

Номер: US20130281038A1

Автор: Takato Ezaki

Принадлежит: Fujitsu Ltd

A receiving apparatus includes a memory that stores parameters corresponding to lines based on a first time interval and a second time interval in a coordinate space in which first phase rotation in a reception signal is defined as a first axis and second phase rotation in a reception signal is defined as a second axis; a selecting device that selects a line that is closest to a coordinate point in the solution space, the coordinate point being represented by a first observation value of the first phase rotation and a second observation value of the second phase rotation; an acquiring device that acquires the parameters corresponding to the line from the memory; and an estimating device that estimates, based on the parameters, the first observation value, and the first time interval or the parameters, the second observation value, and the second time interval, frequency deviations of the reception signals.

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Номер записи: 68

31-10-2013 дата публикации

OVERPOWER DETECTION DEVICE AND RADIO COMMUNICATION DEVICE

Номер: US20130287081A1

Автор: MAEHATA Takashi

Принадлежит: Sumitomo Electric Industries, Ltd.

The present invention relates to an overpower detection device capable of detecting, with a simple configuration, overpower of a circuit that processes a signal associated with instantaneous variation. The overpower detection device of the present invention includes: a power information acquisition section for acquiring an index value of power, at each timing, of a signal transmitted or received in a target device; a comparison section for comparing the index value acquired by the power information acquisition section with an evaluation threshold; a comparison result accumulation section for accumulating a value indicating a comparison result of the comparison section at the each timing; and an overpower determination section for determining overpower of a circuit in the target device, based on an accumulation result of the comparison result accumulation section 1: An overpower detection device , comprising:a power information acquisition section for acquiring an index value of power, at each timing, of a signal transmitted or received in a target device;a comparison section for comparing the index value acquired by the power information acquisition section with an evaluation threshold;a comparison result accumulation section for accumulating a value indicating a comparison result of the comparison section at the each timing; andan overpower determination section for determining overpower of a circuit in the target device, based on an accumulation result of the comparison result accumulation section.2: The overpower detection device according to claim 1 , whereinthe comparison result accumulation section adds a positive or negative first control value to the most recent accumulation result in a case where the index value is larger than the evaluation threshold, and adds a second control value with a sign opposite to that of the first control value to the most recent accumulation result in a case where the index value is smaller than the evaluation threshold.3: The ...

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Номер записи: 69

31-10-2013 дата публикации

Self Calibration Method for Radio Equipment with Receive and Transmit Circuitry

Номер: US20130288616A1

Автор: Jan Soerensen, Poul Olesen

Принадлежит: Individual

A self-calibration circuit and associated method for testing an RF device includes the RF device to be tested having transmit and receive sections, and a built-in self test (BIST) circuit coupled to the transmit and receive sections of the RF device on the same chip. The self-calibration circuit is configured to calibrate the receive section of the RF device in a receive test mode, and calibrate the transmit section of the RF device in a subsequent transmit test mode using the calibrated receive section to measure a transmit output signal from the transmit section and to provide calibration data therefrom used in the transmit section calibration. The self-calibration circuit may include a duplex filter coupled between the transmit and receive sections and the BIST circuit, and a multiplexor coupled between the RF device, and the BIST circuit, configured to select one or more of a plurality of RF devices to be tested.

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Номер записи: 70

07-11-2013 дата публикации

Testing Voice-Based Office Equipment For Immunity To Interference From Wireless Devices

Номер: US20130295856A1

Автор: Berger Stephen, Griffiths Tony, Liguori Joseph, Rodman Jeff, Schaefer Werner, Talwar Vivek

Принадлежит:

According to some embodiments, a method includes placing a device under test (DUT) in a test chamber and applying a pulse-modulated RF wireless test signal to the DUT in the test chamber. The method further includes detecting an acoustic output of the DUT. In addition or as an alternative to applying the pulse-modulated test signal, the test signal strength may be at a level of 30 V/m or 90 V/m. If the DUT is a telephone, it may be coupled via a voice signal path to another telephone, and an output of the other telephone may also be detected. 113.-. (canceled)14. A method comprising:placing a first telephone in a test chamber;connecting the first telephone to a second telephone that is not in the test chamber;applying an RF wireless test signal to the first telephone in the test chamber;detecting an output of the second telephone.15. The method of claim 14 , further comprising:detecting an output of the first telephone.16. The method of claim 14 , wherein the test signal is pulse-modulated.17. The method of claim 14 , wherein the test signal has a strength of at least 30 V/m in at least a portion of the test chamber.18. The method of claim 17 , wherein the test signal has a strength of at least 90 V/m in at least a portion of the test chamber.1920.-. (canceled)2127.-. (canceled)28. A method comprising:using a handheld wireless device to generate a sample signal;recording the sample signal;placing a device under test (DUT) in a test chamber;reproducing the recorded sample signal in the test chamber to apply the reproduced sample signal to the DUT as a test signal; anddetecting an acoustic output of the DUT.29. The method of claim 28 , wherein:the sample signal is recorded using a vector signal analyzer; andthe recorded sample signal is reproduced using a vector signal generator.30. The method of claim 28 , wherein the sample signal is stored as an IQ file. This application claims benefit from provisional patent application no. 60/750,727, filed Dec. 15, 2005, which ...

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Номер записи: 71

07-11-2013 дата публикации

OVER-THE-AIR TEST

Номер: US20130295857A1

Автор: Kyösti Pekka, Nuutinen Jukka-Pekka

Принадлежит:

A preselector forms a plurality of preselections, by generating, for each preselection, a predetermined number of random locations, each location being for an antenna element of the predetermined number of antenna elements around a device under test in an over-the-air test. A selector selects, for at least one path of a radio channel to be simulated, a preselection from among the plurality of preselections for which an absolute error between a theoretical and real spatial correlation is below a predetermined threshold. A connector connects the antenna elements at the locations of the selected preselection and the radio channel emulator together for physically realizing the simulated radio channel for the device under test and the radio channel emulator. 1. An apparatus comprisinga preselector configured to form a plurality of preselections, by generating, for each preselection, a predetermined number of random locations, each location being for an antenna element of the predetermined number of antenna elements around a device under test in an over-the-air test;a selector configured to select, for at least one path of a radio channel to be simulated, a preselection from among the plurality of preselections for which an absolute error between a theoretical and real spatial correlation is below a predetermined threshold; anda connector configured to connect the antenna elements at the locations of the selected preselection and a radio channel emulator together for physically realizing the simulated radio channel for the device under test and the radio channel emulator.2. The apparatus of claim 1 , wherein the preselector is configured to form preselections with a plurality of different numbers of locations for antenna elements claim 1 , and the selector is configured to select a preselection from among preselections with the different numbers of locations for antenna elements.3. The apparatus of claim 1 , wherein the selector is configured to select a desired ...

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Номер записи: 72

07-11-2013 дата публикации

Antenna System And Method For Mitigating Multi-Path Effect

Номер: US20130295864A1

Автор: Kwan-Ho Lee, Ming Lee, Wladimiro Villarroel, Yasutaka Horiki

Принадлежит: AGC Automotive Americas R&D Inc

An antenna system and method utilize a splitter electrically connectable to a single antenna for splitting an RF signal into two signals. A variable phase shifter shifts the phase of one of the signals. A combiner combines the phase shifted and non-phase shifted signals to produce a conditioned signal. A quality examiner circuit changes the amount of phase shift provided by the variable phase shifter to produce a plurality of different conditioned signals. The quality examiner circuit then determines a quality of each conditioned signal and changes the phase shift again to provide the highest quality conditioned signal to a receiver.

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Номер записи: 73

07-11-2013 дата публикации

DETERMINING NOISE LEVELS IN FREQUENCY BAND(S) IN DISTRIBUTED ANTENNA SYSTEMS AND ADJUSTING FREQUENCY BAND(S) OF COMMUNICATIONS SIGNALS IN RESPONSE, AND RELATED COMPONENTS, SYSTEMS, AND METHODS

Номер: US20130295980A1

Автор: REUVEN RAMI, Saban Ofer, Shapira Isaac

Принадлежит: Corning MobileAccess Ltd.

Determining noise levels in frequency band(s) for communications paths in distributed antenna systems. Noise may be induced in communications paths in distributed antenna system as a result of electromagnetic interference from communications media located in close proximity and/or from other electronic devices. Noise induced on communications media may not be evenly distributed across the frequency spectrum, but instead concentrated in certain portions of the frequency spectrum. The frequency band(s) of communication signals distributed in the distributed antenna systems may be adjusted to be provided outside of frequency band(s) having unacceptable noise levels. In this manner, the communications performance (e.g., the signal-to-noise (S/N) ratio) of communications signals communicated in the distributed antenna systems may be improved. 1. A noise detection circuit for detecting noise in a distributed antenna system , comprising: receive an input distributed antenna system communications signal;', 'scan the input distributed antenna system communications signal at a plurality of scan frequencies in a frequency spectrum of a distributed antenna system; and', 'generate a plurality of output scan communications signals each centered at a scan frequency among the plurality of scan frequencies; and, 'a scanning circuit configured toa power detector configured to detect an energy level of the plurality of output scan communications signals and provide a plurality of output signals indicative of noise levels in the distributed antenna system for each of the plurality of scan frequencies.2. The noise detection circuit of claim 1 , wherein the scanning circuit comprises:a mixer; anda local oscillator configured to generate a plurality of input oscillator signals each at a scan frequency among the plurality of scan frequencies; receive the input distributed antenna system communication signal and an input oscillator signal at a scan frequency among the plurality of scan ...

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Номер записи: 74

14-11-2013 дата публикации

Methods and Apparatus for Receiver Quality Test Measurments

Номер: US20130303098A1

Автор: Carlsson Torsten, Svensson Kjell Torgil

Принадлежит: ST-Ericsson SA

Radio receiver test methods and apparatus are based on known relationships between the quality of a receiver that is measured based on signals before they enter a receiver decoder and the quality that is measured based on signals after the decoder. Thus, a signal generator can be set to transmit a known signal in a predetermined radio scenario (e.g., channel frequency, amplitude, etc.), and samples can be obtained of the receiver-processed known signal before the receiver's decoder. Tests in radio scenarios where noise is the dominant signal disturbance and/or tests in radio scenarios where receiver distortion is the dominant signal disturbance can be performed. 1. A method of measuring a quality of a receiver having an input , a decoder , and an output , the method comprising:providing a test signal to the input, the test signal being representative of communication signals handled by the receiver;sampling, before the decoder, a signal generated by frequency-dependent components of the receiver from the test signal, thereby forming a sampled signal; andgenerating an estimate of the quality of the receiver based on a quality of the sampled signal, wherein the quality of the sampled signal is representative of a quality of a received signal at the output of the receiver.2. The method of claim 1 , wherein the quality of the receiver includes a bit error rate or a throughput claim 1 , and the test signal is a known signal and includes a modulation selected for generating the estimate of the quality of the receiver.3. The method of claim 1 , wherein generating the estimate includes comparing the sampled signal with a reference signal that represents the test signal provided to the input after processing by nominal frequency-dependent components and sampled before the decoder claim 1 , and the estimate of the quality of the receiver is based on a difference between the sampled signal and the reference signal.4. The method of claim 3 , wherein the estimate of the quality ...

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Номер записи: 75

28-11-2013 дата публикации

SYSTEM FOR CONSTRAINING AN OPERATING PARAMETER OF AN EHF COMMUNICATION CHIP

Номер: US20130316653A1

Автор: Kyles Ian A., McCormack Gary D.

Принадлежит:

An EHF communication system including an EHF communication chip. The EHF communication chip may include an EHF communication circuit having at least one controllable parameter-based module having a testable and controllable operating parameter The EHF communication chip may further include a test and trim circuit coupled to the EHF communication circuit, where the test and trim circuit includes a logic circuit having one or more memory elements, where the logic circuit is coupled to the controllable parameter-based module. 1. An EHF communication system , comprising:an EHF communication chip, including:an EHF communication circuit, wherein the EHF communication circuit comprises at least one controllable parameter-based module having a testable and controllable operating parameter; anda test and trim circuit coupled to the EHF communication circuit, wherein the test and trim circuit includes a logic circuit having one or more memory elements;wherein the logic circuit is coupled to the at least one controllable parameter-based module having an associated testable and controllable operating parameter.2. The system of claim 1 , wherein the one or more memory elements include a nonvolatile memory element and a temporary data register.3. The system of claim 1 , wherein the test and trim circuit further comprises an interface configured to operatively connect an external control circuit to the logic circuit claim 1 , wherein the external control circuit is configured to control operation of the test and trim circuit.4. The system of claim 3 , further comprising an external test and trim rig including the external control circuit claim 3 , wherein the test and trim rig is operatively connected to the interface of the EHF communication chip.5. The system of claim 1 , wherein the operating parameter is controlled by a signal that is representative of a parameter value stored in one of the non-volatile memory and the temporary data register.6. The system of claim 5 , wherein ...

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Номер записи: 76

28-11-2013 дата публикации

SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND RECEIVING DEVICE

Номер: US20130316655A1

Автор: Fukuda Shinichi, Nakano Hiroaki

Принадлежит: SONY CORPORATION

This disclosure relates to a signal processing device, a signal processing method, and a receiving device that are capable of detecting response information at a high degree of accuracy from a carrier signal that is load-modulated based on the response information. A positive DC generating unit generates a positive threshold based on a load-modulated carrier signal. A positive selecting unit compares the voltage of the carrier signal with the positive threshold, and outputs the value of the larger one to an adding unit . A negative DC generating unit generates a negative threshold based on the load-modulated carrier signal. A negative selecting unit compares the voltage of the carrier signal with the negative threshold, and outputs the value of the smaller one to the adding unit . The adding unit adds the output of the positive selecting unit and the output of the negative selecting unit , and outputs the addition result to an IQ detecting unit . As a result of the combining, a signal that has smaller Vpp than that of the original carrier signal and maintains the fluctuation portions of the voltage is obtained. This disclosure can be applied to non-contact communication systems. 1. A signal processing device comprising:a positive detecting unit configured to compare an ASK-modulated carrier signal with a positive threshold value, and detect the larger one of the values as a positive amplitude fluctuation portion of a voltage;a negative detecting unit configured to compare the voltage of the carrier signal with a negative threshold value, and detect the smaller one of the values as a negative amplitude fluctuation portion; anda combining unit configured to combine the positive amplitude fluctuation portion and the negative amplitude fluctuation portion of the voltage of the carrier signal.2. (canceled)3. The signal processing device according to claim 1 , further comprisinga shaping unit configured to shape the waveform of a result of the combining of the positive ...

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Номер записи: 77

28-11-2013 дата публикации

RF Circuit and Isolation Detecting Device Thereof, And Method For Measuring a Degree of Isolation Between a First RF Circuit and a Second RF Circuit with Respect to a Frequency

Номер: US20130316657A1

Автор: Chen Yung-Jinn

Принадлежит: Wistron NeWeb Corp.

An isolation detecting device includes a signal receiver for receiving an attenuated RF signal and transmitting at least part of the attenuated RF signal to a power sensor for conversion into a voltage signal, an A/D converter for converting the voltage signal into a numerical value, and a processing module for determining a received transmission power of the attenuated RF signal with reference to the numerical value and at least one reference set, which contains a transmission power and a numerical value associated with a test RF signal, and for further determining an isolation value by subtracting the received transmission power from a preset transmission power at which an original RF signal resulting into the attenuated RF signal is transmitted. 1. An isolation detecting device adapted to be disposed in a first radio frequency (RF) circuit for receiving an attenuated RF signal at a received transmission power and resulting from an original RF signal , which is transmitted by a second RF circuit at a preset transmission power , and for measuring an isolation value that represents a degree of isolation between the first RF circuit and the second RF circuit with respect to a frequency of the original RF signal , said isolation detecting device comprising:a power sensor;a signal receiver connected electrically to said power sensor, adapted for receiving the attenuated RF signal, and transmitting at least part of the attenuated RF signal to said power sensor, said power sensor converting said at least part of the attenuated RF signal into a voltage signal;an analog-to-digital converter connected electrically to said power sensor for receiving the voltage signal therefrom, and converting the voltage signal into a numerical value associated with the attenuated RF signal; anda processing module connected electrically to said analog-to-digital converter for receiving the numerical value therefrom, and having stored therein the preset transmission power and at least one ...

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Номер записи: 78

05-12-2013 дата публикации

Method of Detecting a Direction of Arrival of at Least One Interference Signal and System to Carry Out Said Method

Номер: US20130322505A1

Автор: FLOCH Jean-Jacques

Принадлежит: Astrium GmbH

A method of detecting a direction of arrival of at least one interference signal interfering a wanted signal in a plurality of received signals involves receiving, by a number of antennas of an antenna array, a number of signals, identifying an interference signal in the received signals, applying a beam forming signal processing technique to the identified interference signal, and detecting the direction of arrival from the results of the beam forming signal processing. 1. A method of detecting a direction of arrival of at least one interference signal interfering a wanted signal in a plurality of received signals , the method comprising:receiving, by a plurality of antennas of an antenna array, a plurality of signals;identifying the at least one interference signal in the plurality of received signals;applying a beam forming signal processing technique to the at least one identified interference signal;detecting the direction of arrival of the at least one identified interference signal using results of the beam forming signal processing step.2. A method according to claim 1 , wherein digital data are obtained from the plurality of received signals received by a plurality of receivers claim 1 , each of the receivers being connected to at least one of the plurality of antennas claim 1 , and wherein the digital data coming from the digital receivers are collected to evaluate a cross-covariance matrix.3. A method according to claim 1 , wherein the beam forming signal processing technique is a pre-correlation beam forming signal processing technique.4. A method according to claim 1 , wherein the beam forming signal processing technique is a post-correlation beam forming signal processing technique.5. A method according to claim 2 , wherein the detecting step is carried out by applying a direction-of-arrival (DOA) algorithm to the cross-covariance matrix. Exemplary embodiments of the present invention relate to a method of detecting a direction of arrival of at least ...

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Номер записи: 79

05-12-2013 дата публикации

INFORMATION IDENTIFICATION SYSTEM, INFORMATION IDENTIFICATION DEVICE, AND INFORMATION IDENTIFICATION METHOD

Номер: US20130324051A1

Автор: Magarida Naofumi, MIZUTANI Atsushi, Oshiro Yuta

Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An information identification system includes at least one mobile terminal and an information identification device. The mobile terminal includes: a detection unit configured to detect that the host terminal has been carried into a vehicle cabin; a first notification unit configured to, if the detection unit detects that the host terminal has been carried into the cabin, transmit a first notification signal providing notification that the host terminal has been carried into the cabin; and a second notification unit configured to, if the first notification signal transmitted from another mobile terminal is detected, transmit a second notification signal providing notification that the host terminal has been already present in the cabin. The information identification device includes an identification unit configured to, if the second notification signal is detected, identify the mobile terminal having transmitted the second notification signal as the driver's mobile terminal. 1. An information identification system comprising:at least one mobile terminal including: a detection unit configured to detect that the host terminal has been carried into a vehicle cabin; a first notification unit configured to, if the detection unit detects that the host terminal has been carried into the vehicle cabin, transmit a first notification signal that provides notification that the host terminal has been carried into the vehicle cabin; and a second notification unit configured to, if the first notification signal transmitted from another mobile terminal is detected, transmit a second notification signal that provides notification that the host terminal has been already present in the vehicle cabin; andan information identification device configured to wirelessly communicate with the at least one mobile terminal, the information identification device including an identification unit configured to, if the second notification signal is detected, identify the mobile terminal that has ...

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Номер записи: 80

05-12-2013 дата публикации

POWER DETECTOR WITH TEMPERATURE COMPENSTATION

Номер: US20130324062A1

Автор: DiCicco Marc Gerald, Wang Xinwei, Zhang Xiangdong, Zuo Yongrong

Принадлежит: QUALCOMM INCORPORATED

Power detectors with temperature compensation and having improved accuracy over temperature are disclosed. In an aspect of the disclosure, variations of a power detector gain over temperature is reduced by varying both the gate and drain voltages of MOS transistors within a power detector. In an exemplary design, an apparatus includes at least one MOS transistor, which receives an input signal, detects the power of the input signal based on a power detection gain, and provides an output signal indicative of the power of the input signal. The at least one MOS transistor is applied a variable gate bias voltage and a variable drain bias voltage in order to reduce variations of the power detection gain over temperature. At least one additional MOS transistor may receive a second variable gate bias voltage and provide the variable drain bias voltage for the at least one MOS transistor. 1. An apparatus for wireless communication , comprising:at least one metal oxide semiconductor (MOS) transistor configured to receive an input signal, detect power of the input signal based on a power detection gain, and provide an output signal indicative of the power of the input signal, the at least one MOS transistor being applied a variable gate bias voltage and a variable drain bias voltage to reduce variations of the power detection gain over temperature.2. The apparatus of claim 1 , further comprising:at least one additional MOS transistor coupled to the at least one MOS transistor, the at least one additional MOS transistor being applied a second variable gate bias voltage and providing the variable drain bias voltage for the at least one MOS transistor.3. The apparatus of claim 1 , the at least one MOS transistor comprising:a first N-channel MOS (NMOS) transistor having a source coupled to circuit ground, a gate receiving the variable gate bias voltage and the input signal, and a drain receiving the variable drain bias voltage, anda second NMOS transistor having a source coupled ...

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Номер записи: 81

05-12-2013 дата публикации

SYSTEM AND METHOD FOR EXECUTION OF USER-DEFINED INSTRUMENT COMMAND SEQUENCES USING MULTIPLE HARDWARE AND ANALYSIS MODULES

Номер: US20130326291A1

Автор: ANDERSEN Thomas Toldborg, ELSEROUGI Nabil Ayoub, SCHILTER Roman

Принадлежит:

A system and method for the execution of a program comprises a user-defined sequence of standard hardware and analysis module commands of an instrument, in the context of a tester comprising a plurality of VSAs and VSGs, or other hardware measurement modules types, where the coordination of command execution and resource availability is built into the system as an inherent part of its overall architecture. As such, the commands are the same as those ordinarily executed in piecemeal fashion, but are now automatically and sequentially executed in an atomic and deterministic manner through the coordinated interaction of embodiments of the invention. 112-. (canceled)13. An apparatus including a test sequence processor for coordinating issuances of test commands among multiple test equipment hardware modules , comprising: receive one or more sets of test commands for a plurality of test equipment hardware modules,', 'receive data indicative of availability of a portion of said plurality of test equipment hardware modules,', 'separate portions of each of said one or more sets of test commands to provide respective subsets of test commands for corresponding ones of said plurality of test equipment hardware modules, and', 'provide a test execution command following reception of data confirming availability of a portion of said plurality of test equipment hardware modules corresponding to one of said subsets of test commands; and, 'a hardware module monitor and command processor configured to'} store said respective subsets of test commands, and', 'convey, following reception of said test execution command, said stored respective subsets of test commands., 'a hardware module controller configured to communicate with said hardware module monitor and command processor, and'}14. The apparatus of claim 13 , wherein:said hardware module monitor and command processor is further configured to provide, following reception of a test completion command, a test execution command ...

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Номер записи: 82

12-12-2013 дата публикации

Data Retransmission Method, Apparatus, and System

Номер: US20130329573A1

Автор: Chen Zhenwei

Принадлежит:

A data retransmission method, apparatus, and system can improve a success ratio of data packet retransmission. A data retransmission method includes: after a source node continuously transmits at least two data packets to a destination node according to a go-back-N automatic repeat request, monitoring and decoding, by a relay node, the at least two data packets; storing a copy of a successfully decoded data packet; monitoring a response message to each data packet, where the response message is returned by the destination node to the source node; and sending a copy of a data packet that corresponds to a reception negative acknowledgment message to the destination node, when the monitored response message is the reception negative acknowledgment message. 1. A data retransmission method , comprising:monitoring and decoding, by a relay node, each data packet that is sent by a source node for a first time in a go-back-N automatic repeat request (GBN-ARQ) mode to a destination node;storing a copy of a successfully decoded data packet;monitoring a response message to each data packet, wherein the response message is returned by the destination node to the source node; andsending a copy of a data packet that corresponds to a reception negative acknowledgment message to the destination node, when the monitored response message is the reception negative acknowledgment message.2. The data retransmission method according to claim 1 , wherein in a frame in which the relay node sends the copy of the data packet that corresponds to the reception negative acknowledgment message to the destination node claim 1 , the source node re-sends the data packet that corresponds to the reception negative acknowledgment message to the destination node; and the source node re-sends the data packet and the relay node sends the copy of the data packet respectively in their corresponding time slot in the same frame.3. The data retransmission method according to claim 1 , wherein after re-sending ...

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Номер записи: 83

12-12-2013 дата публикации

Circuit Arrangement for RF Loopback

Номер: US20130329574A1

Автор: Alanen Marko, Ikonen Pekka, Kalajo Sami, Lehtonen Pasi, Pellikka Harri, Tikka Pasi

Принадлежит: EPCOS AG

A circuit arrangement includes a transceiver unit, a switching device coupled to the transceiver unit with a terminal and a control device coupled to the switching device. The control device is configured to operate in a first and in a second mode of operation. In the first mode of operation, the switching device is configured by the control device such that a first signal is routed from the transceiver unit via the switching device back to the transceiver unit in a feedback loop. In the second mode of operation, the switching device is configured by the control device such that a second signal is routed from the transceiver unit via the switching device to the terminal or the second signal is routed from the terminal via the switching device to the transceiver. 18-. (canceled)9. A circuit arrangement comprising:a transceiver unit;a switching device coupled to the transceiver unit, the switching device including a terminal configured to be coupled to an antenna device;a control device coupled to the switching device, the control device being configured to operate the circuit arrangement in a first mode of operation and in a second mode of operation;wherein in the first mode of operation, the switching device is configured by the control device such that a first signal path is routed from the transceiver unit via the switching device back to the transceiver unit in a feedback loop; andin the second mode of operation, the switching device is configured by the control device such that a second signal path is routed from the transceiver unit via the switching device to the terminal or the second signal path is routed from the terminal via the switching device to the transceiver unit.10. The circuit arrangement according to claim 9 , wherein claim 9 , in the first mode of operation the switching device is configured by the control device additionally such that the first signal path is routed from the transceiver unit via the switching device to the terminal and via the ...

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Номер записи: 84

19-12-2013 дата публикации

Dynamic and configuration based fractional frequency reuse for uneven load distributions

Номер: US20130337858A1

Автор: Honghai Zhang, Narayan Prasad, Sampath Rangarajan

Принадлежит: NEC Laboratories America Inc

A fractional frequency reuse method for assigning physical resource units of a contiguous frequency band to sectors of cells is disclosed. Each cell includes at least one base station, for transmission of data to users in the sectors The method comprises, for each cell, segmenting the frequency band such that each separate segment includes a first contiguous portion of physical resource units dedicated to all sectors of the cell in vicinities of the center of the cell and a second contiguous portion of physical resource units dedicated for use in only one of the sectors in the cell in an outer area of the cell, assigning each cell with a physical resource unit configuration such that the second contiguous portion of physical resource units of a sector of a given cell partially overlaps with the first contiguous portion of physical resource units in a segment including the second contiguous portion dedicated to the same sector of a cell neighboring the given cell, and transmitting the data to the users in the sectors in accordance with the assigned physical resource unit configurations. Other methods, apparatuses, and systems also are disclosed.

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Номер записи: 85

26-12-2013 дата публикации

NOISE DETECTION METHOD, NOISE DETECTION APPARATUS, SIMULATION METHOD, SIMULATION APPARATUS, AND COMMUNICATION SYSTEM

Номер: US20130343445A1

Автор: Hisada Toshiya, Horihata Satoshi, Ishiko Shinichi, Morikura Masahiro, Umehara Daisuke

Принадлежит:

For voltage values (observed noise sequence) in an electronic power line (communication medium) which are obtained at a predetermined interval, initial values of noise characteristics based on a statistic of the observed noise sequence itself are decided by a moment method (S to S), the noise characteristics (state transition probabilities and state noise power) for maximization of the likelihood of the observed noise sequence are obtained from the initial values by MAP (Maximum A Posteriori) estimation using a Baum-Welch algorithm (S to S), a state sequence is estimated from the obtained noise characteristics, and an impulsive noise at each time point is detected. 1. A noise detecting method for detecting a noise occurred in a communication medium , the method comprising the steps of;(a) measuring a signal level in the communication medium at a predetermined interval;(b) extracting, as an observed noise sequence, a measurement result for a predetermined measurement periodical unit;(c) calculating, from the extracted observed noise sequence, a noise characteristic by using a hidden Markovian-Gaussian noise model;(d) calculating, from the calculated noise characteristic and the observed noise sequence, an estimated state sequence that is a sequence indicative of whether or not a state is a noise-occurred state;(e) individually detecting, from the estimated state sequence, an impulsive noise at each time point within the measurement periodical unit; and(f) determining, based on the calculated noise characteristic, the presence or absence of occurrence of an impulsive noise for the measurement periodical unit,wherein the estimated state sequence is calculated as a sequence including a state, in which an impulsive noise is occurred, or a state, in which no impulsive noise is occurred, for each section equivalent to one or a plurality of the intervals, andin the step (f), the determination is made based on at least one of a temporal concentration of an impulsive noise, ...

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Номер записи: 86

26-12-2013 дата публикации

APPARATUS AND METHOD FOR DETECTING FAULTY ANTENNAS

Номер: US20130344831A1

Автор: Fu Tingting, SUN Wenwen, Yuan Fei

Принадлежит: TELEFONAKTIEBOLGET LM ERICSSON (PUBL)

The present invention discloses an apparatus for detecting a faulty antenna among a plurality of antennas contained in a communication device (), comprising: a measurer () adapted to measure signal strengths of signals obtained from the plurality of antennas each; a calculator () adapted to calculate differences between each two of the measured signal strengths; a first comparator () adapted to compare each of the calculated differences with a first predetermined threshold value; and a first decider () adapted to decide, among the plurality of antennas, an antenna to be faulty on the basis of a respective result of the comparison. The present invention provides an efficient and direct way to detect antennas that are not performing according to expectations, without use of extra external or dedicated detection devices, which reduces hardware and software cost. Further, the detection performed according to the present invention only takes advantage of the measured data of signal strengths, and neither extra transmit power nor time slot is needed for the detection. Also, statistical data of antennas for a long term can be obtained according to the present invention. 1200. An apparatus for detecting a faulty antenna among a plurality of antennas contained in a communication device () , comprising:{'b': '210', 'a measurer () adapted to measure signal strengths of signals obtained from the plurality of antennas each;'}{'b': '220', 'a calculator () adapted to calculate differences between each two of the measured signal strengths;'}{'b': '230', 'a first comparator () adapted to compare each of the calculated differences with a first predetermined threshold value; and'}{'b': '240', 'a first decider () adapted to decide, among the plurality of antennas, an antenna to be faulty on the basis of a respective result of the comparison.'}2. The apparatus according to claim 1 , wherein the communication device is a receiver claim 1 , the plurality of antennas are a plurality of ...

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Номер записи: 87

09-01-2014 дата публикации

Method and System for Analyzing Radio Performance During Over-the-Air Operation

Номер: US20140011495A1

Автор: Caudill Danny, Keefe Michael, McCarthy John, Mitchell Robert, PARKEY Charna, Qahwash Murad

Принадлежит: Locus Location Systems, LLC

An apparatus for determining operating characteristics of radio-frequency (RF) transmitting devices while the devices are in normal operation transmitting over-the-air RF signals. The apparatus comprises at least one signal sensor for receiving the RF signals, each sensor responsive to the RF signals received at a plurality of antennas or received at a directional antenna, an analyzer for determining signal parameters of received RF signals and for determining operating characteristics of the transmitting devices from the signal parameters, wherein each RF signal includes an identifier of the transmitting device, the apparatus using the identifier to link operating characteristics determined from the RF signals to the transmitting device, and a graphical user interface for displaying the operating characteristics for each transmitting device. 1. An apparatus for identifying failed or suspect radio-frequency (RF) transmitting devices while the radio-frequency transmitting devices are in normal operation transmitting over-the-air RF signals , each of the radio-frequency transmitting devices including an identifier , the apparatus comprising:at least one RF signal sensor receiving the RF signals, the at least one sensor responsive to the RF signals received; determining at least one of waveform visualization information and bit-field visualization information; and', 'using the identifier from the received RF signals to correlate the at least one waveform visualization information and bit-field visualization information of the particular one of the transmitting devices; and, 'an analyzera graphical user interface displaying at least one of the waveform visualization information and the bit-field visualization information in a form that can be used to identify transmitting devices that have failed and transmitting devices that are suspect.2. The apparatus according to claim 1 , wherein the analyzer measures signal parameters of received RF signals and determines ...

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Номер записи: 88

16-01-2014 дата публикации

COMBINED SENSING METHODS FOR COGNITIVE RADIO

Номер: US20140018008A1

Автор: Tang Haiyun

Принадлежит:

Embodiments of cognitive radio technology can recover and utilize under-utilized portions of statically-allocated radio-frequency spectrum. A plurality of sensing methods can be employed. Transmission power control can be responsive to adjacent channel measurements. Digital pre-distortion techniques can enhance performance. Embodiments of a high dynamic range transceiver architecture can be employed. 1: A method for sensing for cognitive radio comprising the steps of:receiving a first specified signal;performing one or more first specified sensing functions,wherein the one or more first specified sensing functions are at least partially responsive to the first specified signal;performing one or more second specified sensing functions,wherein the one or more second specified sensing functions are at least partially responsive to the first specified signal; anddetermining a first sensing result,wherein the first sensing result is at least partially responsive to the one or more first specified sensing functions and at least partially responsive to the one or more second specified sensing functions.2: A system for sensing for cognitive radio comprising: a first sensing element,', 'wherein the first sensing element provides one or more first specified sensing functions, and,', 'wherein the one or more first specified sensing functions are at least partially responsive to a first specified signal; and', 'a second sensing element,', 'wherein the second sensing element provides one or more second specified sensing functions, and,', 'wherein the one or more second specified sensing functions are at least partially responsive to the first specified signal; and,, 'a first cognitive radio unit comprisingwherein the first cognitive radio unit provides a first sensing result at least partially responsive to the one or more first specified sensing functions and at least partially responsive to the one or more second specified sensing functions. This application is related to and ...

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Номер записи: 89

16-01-2014 дата публикации

RECEIVING DEVICE, RECEIVING METHOD, AND COMPUTER PROGRAM

Номер: US20140018009A1

Автор: Ishida Kazuhiro

Принадлежит:

Provided are a receiving device, a receiving method, and a computer program capable of more reliably ascertaining the number and power of transmitting antennas so as to more accurately find a base station. A first power of a first signal transmitted from a first transmitting antenna and a second power of a second signal transmitted from a second transmitting antenna are measured, and a determination is made as to whether the ratio of the first power and the second power is larger than a predetermined threshold value. When a determination is made that the ratio of the first power and the second power is larger than the threshold value, a presumption is made that the number of transmitting antennas is two. 1. A receiving device comprising:a measuring means for measuring a first power of a first signal transmitted from a first transmission antenna, and a second power of a second signal transmitted from a second transmission antenna;a judgment means for judging whether or not a ratio between the first power and the second power is greater than a predetermined threshold value; andan estimation means for estimating that the number of transmission antennas is two, in the case where it is judged that the ratio between the first power and the second power is greater than the predetermined threshold value.2. The receiving device according to :{'b': 0', '1, 'wherein, the measuring means measures a power of a reference signal R as the first power and a power of a reference signal R as the second power.'}3. The receiving device according to claim 1 , further comprising:a calculation means for calculating a received power in such a way that; if it is estimated that the number of transmission antennas is two, an average of the first power and the second power gives a received power; and meanwhile if it is not estimated that the number of transmission antennas is two, the power of the first power becomes a received power.4. A receiving method comprising:a measuring step for ...

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Номер записи: 90

16-01-2014 дата публикации

RECEIVING DEVICE, RECEIVING METHOD, AND COMPUTER PROGRAM

Номер: US20140018025A1

Автор: Ishida Kazuhiro

Принадлежит:

Provided are a receiving device, receiving method, and computer program such that good precision for signal received power estimation is achieved even during fast fading. The receiving device includes: a segmenting unit for segmenting the period the signal received power of a reception signal, i.e., a received signal, is measured in, according to characteristic values related to the power of the reception signal (for example, SNR); and a calculation unit for calculating the RSRP (signal received power) from the power of the channel estimate at each of the segment periods, i.e., the portions that the period was segmented into. 1. A receiving device comprising:a dividing means for dividing a period for measuring Signal Received Power of a received signal, which is a signal having been received, according to a characteristic value relating to the power of the received signal; anda calculation means for calculating the Signal Received Power according to power of a channel estimation value of each divided period that is each one of the divided periods.2. The receiving device according to claim 1 , further comprising:an adding means for adding up the power of the channel estimation value of each divided period, in a time-axis direction;an averaging means for averaging a result added up, in a frequency-wise direction; anda conjugate multiplication means for applying a process of conjugate multiplication to a result averaged in the frequency-wise direction;wherein, the calculation means calculates the Signal Received Power, according to a result of the conjugate multiplication.3. The receiving device according to :wherein, the characteristic value is any one of a Signal-to-Noise power ratio (SNR), a received signal strength indication, and a gain of auto gain control.4. A receiving method comprising:a dividing step for dividing a period for measuring Signal Received Power of a received signal, which is a signal having been received, according to a characteristic value ...

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Номер записи: 91

30-01-2014 дата публикации

Signal generating method and signal generating device

Номер: US20140029509A1

Автор: Mikihiro Ouchi, Tomohiro Kimura, Yutaka Murakami

Принадлежит: Panasonic Corp

A transmission method of simultaneously transmitting a first modulated signal and a second modulated signal at a common frequency performs precoding on both signals using a fixed precoding matrix and regularly changes the phase of at least one of the signals. One of signal generation processing in which phase change is performed and signal generation processing in which phase change is not performed is selectable, thereby improving general versatility in signal generation.

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Номер записи: 92

30-01-2014 дата публикации

RECEIVER UTILIZING MULTIPLE RADIATION PATTERNS TO DETERMINE ANGULAR POSITION

Номер: US20140030983A1

Автор: Alexopoulos Nicolaos G., Castaneda Jesus, Grau Besoli Alfred

Принадлежит: BROADCOM CORPORATION

A receiver includes an antenna array, an angular positioning module, a low noise amplifier module, and a down conversion module. The antenna array is operable to receive an inbound wireless signal. The angular positioning module is operable to: receive a plurality of received inbound wireless signals from the antenna array. An angular position of a source of the inbound wireless signal is determined from at least some of the plurality of received inbound wireless signals based on a first radiation pattern and a second radiation pattern of the plurality of received inbound wireless signals; and output a representation of the inbound wireless signal. The low noise amplifier module is operably coupled to amplify the representation of the inbound wireless signal to produce an amplified inbound wireless signal. The down conversion module is operably coupled to convert the amplified inbound wireless signal into a baseband or near baseband signal. 120-. (canceled)21. A receiver comprising: receive a plurality of inbound wireless signals;', 'determine angular position of a source of an inbound wireless signal from at least some of the plurality of inbound wireless signals based on a first radiation pattern and a second radiation pattern of the plurality of inbound wireless signals;', 'adjust the first and the second radiation pattern to affect reception strength of the inbound wireless signal; and', 'output a representation of the inbound wireless signal., 'an angular positioning module configured to couple with an antenna array, the angular positioning module configured to22. The receiver of claim 21 , wherein the angular positioning module comprising:a plurality of phase shifters operably coupled to phase shift the at least some of the plurality of inbound wireless signals to produce a plurality of phase shifted inbound wireless signals;a sum-difference beamforming network operably coupled to generate a sum signal and a difference signal from the plurality of phase ...

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Номер записи: 93

30-01-2014 дата публикации

LOW POWER LOCAL OSCILLATOR SIGNAL GENERATION

Номер: US20140030991A1

Автор: Bossu Frederic, Gudem Prasad Srinivasa Siva, Liu Li, Narathong Chiewcharn

Принадлежит: QUALCOMM INCORPORATED

A method and apparatus for providing an oscillating signal within a transmitter/receiver circuit is described. The transmitter/receiver circuit may include an oscillator that generates an oscillating signal that may be provided to a low power, low gain mixer of the transmitter/receiver circuit along a shorter circuit path that includes low power circuitry, such as low power buffers and low power frequency dividers. The oscillating signal may also be provided to a high power, high gain mixer along a longer circuit path that includes high power circuitry, such as high power buffers and high power frequency dividers. Specifically, the low power circuitry is adapted to consume less power in an ON state than the high power circuitry in an ON state, and the shorter circuit path has a shorter electrical path length than the longer circuit path. 1. A method for providing an oscillating signal within a receiver circuit , the method comprising:generating the oscillating signal at an oscillator of the receiver circuit;determining if a data signal has a power level greater than, equal to, or less than a predefined threshold value;activating a first mixer and a first circuitry if the power level is greater than the predefined threshold value, wherein the first mixer is electrically coupled to the oscillator along a first path having the first circuitry, the first path having a first electrical path length;providing the oscillating signal to the first mixer via the first path and down-converting the data signal using the first mixer if the power level is greater than the predefined threshold value;activating a second mixer and a second circuitry if the power level is equal to or less than the predefined threshold value, wherein the second mixer is electrically coupled to the oscillator along a second path having the second circuitry, the second path having a second electrical path length, wherein the first electrical path length is shorter than the second electrical path length; ...

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Номер записи: 94

06-02-2014 дата публикации

AUTOMATIC GAIN CONTROL IN A RECEIVER

Номер: US20140036978A1

Автор: Bhukania Bijoy, Ramasubramanian Karthik, Tangudu Jawaharlal

Принадлежит: TEXAS INSTRUMENTS INCORPORATED

Automatic gain control in a receiver. A method for controlling operating range of an analog-to-digital converter (ADC) by an automatic gain control circuit includes estimating a peak-to-average ratio corresponding to an analog signal from digital samples of the analog signal. The method includes determining a peak value corresponding to the analog signal based on the peak-to-average ratio. Further, the method includes maintaining magnitude of the analog signal at an input of the ADC and gain of the receiver based on the peak value. 1. A method for detecting narrow band interference by an automatic gain control circuit in a receiver , comprising:A. estimating a peak-to-average ratio corresponding to an analog signal from digital samples of the analog signal;B. comparing the peak-to-average ratio with a threshold; andC. detecting the narrow band interference if the peak-to-average ratio is below the threshold.2. The method as claimed in in which estimating the peak-to-average ratio includes determining a second order norm of the digital samples claim 1 , the second order norm representing a root-mean-square voltage of the digital samples; and determining a fourth order norm of the digital samples claim 1 , the fourth order norm being a statistical representation of peak amplitude characteristics of the digital samples.3. The method as claimed in including controlling an operating range of an analog-to-digital converter based on the narrow band interference by providing the peak-to-average ratio as a metric to be used by the analog-to-digital converter. This application is a Divisional of prior Application No. 12/698,173, filed Feb. 2, 2010, currently pending;Which claims priority from Indian Provisional Application Serial No. 1809/CHE/2009 filed Jul. 30, 2009, entitled “SIGNAL PEAK BASED AUTOMATIC GAIN CONTROLLER FOR NARROWBAND INTERFERENCE DOMINATED RECEIVERS”, having same inventors and assigned to same assignee Texas Instruments Incorporated, which is incorporated ...

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Номер записи: 95

13-02-2014 дата публикации

METHOD AND SYSTEM FOR PERFORMING TESTING OF PHOTONIC DEVICES

Номер: US20140043050A1

Автор: Krasulick Stephen B., Stone Robert J.

Принадлежит:

A photonics system includes a transmit photonics module and a receive photonics module. The photonics system also includes a transmit waveguide coupled to the transmit photonics module, a first optical switch integrated with the transmit waveguide, and a diagnostics waveguide optically coupled to the first optical switch. The photonics system further includes a receive waveguide coupled to the receive photonics module and a second optical switch integrated with the receive waveguide and optically coupled to the diagnostics waveguide. 1. A photonics system including:a transmit photonics module;a receive photonics module;a transmit waveguide coupled to the transmit photonics module;a first optical switch integrated with the transmit waveguide;a diagnostics waveguide optically coupled to the first optical switch;a receive waveguide coupled to the receive photonics module; anda second optical switch integrated with the receive waveguide and optically coupled to the diagnostics waveguide.2. The system of further comprising an optical tap coupled to the diagnostics waveguide.3. The system of further comprising a detector coupled to the optical tap.4. The system of further comprising an optical coupler coupled to the optical tap.5. The system of wherein the optical coupler comprises an out-of-plane coupler.6. The system of wherein the out-of-plane coupler comprises at least one of an angled facet or a surface emitting grating structure.7. The system of further comprising a second out-of-plane coupler optically coupled to the diagnostics waveguide.8. The system of further comprising at least one of testing circuits or link validation circuits.9. The system of wherein the first optical switch and the second optical switch comprise variable couplers.10. A method of performing testing of a photonic device claim 1 , the method comprising:generating a test pattern;generating an optical signal associated with the test pattern;transmitting the optical signal through a transmit ...

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Номер записи: 96

20-02-2014 дата публикации

Method For Channel Estimation In Vehicle-To-Environment Communication And Communication Device Arranged Therefor

Номер: US20140050258A1

Автор: Menzel Marc, Schräbler Sighard, Stählin Ulrich

Принадлежит:

The invention relates to a method and a correspondingly arranged communication device for channel estimation in vehicle-to-environment communication, wherein a model of the environment influencing the vehicle-to-environment communication is produced from parameters of a vehicle-to-environment communication and the quality of the model for the environment is ascertained by the convergence of the parameters used in the model. The course of the convergence of the parameters in the model is monitored and conclusions are drawn with regard to the environment from the course of the convergence of the parameters. 110-. (canceled)11. A method for channel estimation in vehicle-to-environment communication , comprising a computing unit performing the steps of:generating at least one model of the environment influencing the vehicle-to-environment communication from parameters of vehicle-to-environment communication;ascertaining the quality of the at least one model based on convergence of the parameters associated with the at least one model;monitoring a course of convergence of the parameters over time; anddrawing conclusions about the environment from the course of convergence of the parameters.12. The method as claimed in claim 11 , wherein the at least one model comprises a plurality of models used for channel estimation claim 11 , wherein a typical environment is assigned to each model claim 11 , and a model is selected out of the plurality of models based on the convergence of the parameters associated with at least one model out of the plurality of models.13. The method as claimed in claim 12 , wherein the convergence of the parameters is evaluated simultaneously for the plurality of models for channel estimation and a model out of the plurality of models having the best convergence is selected.14. The method as claimed in claim 13 , wherein a hysteresis value and/or a threshold value is assigned to the course of convergence of the parameters claim 13 , which hysteresis ...

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Номер записи: 97

20-02-2014 дата публикации

Wireless transceiver test bed system and method

Номер: US20140051363A1

Автор: John P. Carlson, Joseph P. Kennedy

Принадлежит: Echo Ridge LLC

A system and method for testing wireless transceivers in a virtual wireless environment including emulating an RF environment, creating virtual spectrum users having selectable transmission parameters and physical characteristics and evaluating the operation of the wireless transceiver in the virtual wireless environment.

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Номер записи: 98

20-02-2014 дата публикации

Complex Intermediate Frequency Based Receiver Architecture

Номер: US20140051441A1

Автор: Mu Fenghao, Sundström Lars, Wilhelmsson Leif

Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

The disclosure relates to a Complex Intermediate Frequency (CIF)-based receiver adapted to process a received signal comprising a signal component at a desired frequency and a signal component as an image frequency. The CIF-based receiver determines the power of the received signal by calibrating the receiver to minimize the power of the signal component at the image frequency that interferes with the signal component at the desired frequency, introduces signal leakage from the image frequency to intentionally degrade the quality of the signal component at the desired frequency, and determines the power of the signal component at the image frequency based on the amount of degradation. 1. A method of determining signal power in a complex intermediate frequency-based (CIF-based) receiver adapted to process a received signal that comprises a signal component at a desired frequency and a signal component at an image frequency , the method comprising:calibrating the CIF-based receiver to minimize the power of the signal component at the image frequency that interferes with the signal component at the desired frequency;introducing signal leakage from the image frequency to intentionally degrade the quality of the signal component at the desired frequency; anddetermining the power of the signal component at the image frequency based on the amount of degradation.2. The method according to claim 1 , wherein the CIF-based receiver comprises at least one RF mixer and a plurality of IF mixers and the method further comprises:adjusting at least one of the IF mixers to cancel mismatch caused by the at least one RF mixer for at least one of the desired frequency and the image frequency.3. The method according to claim 2 , wherein the mismatch caused by the RF mixer defines at least to what extent the signal component at the image frequency leaks into the desired frequency or vice versa.4. The method according to claim 1 , further comprising:determining an image-rejection ratio of ...

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Номер записи: 99

27-02-2014 дата публикации

MEASURING CHANNEL SIGNAL TO NOISE METRIC USING CONSTELLATION DATA

Номер: US20140056342A1

Автор: BAKER DANIEL G., GOPISHANKAR LAKSHMANAN, Tusing George W.

Принадлежит: TEKTRONIX, INC.

Described are systems and methods of estimating a Signal-to-Noise (S/N) ratio of an input channel carrying a QAM signal. A Modulation Error Ratio (MER) is calculated for the input QAM signal, but uses only the centermost error values of a constellation of the input QAM signal in generating this modified MER. The modified MER accurately represents the S/N ratio of the input channel carrying the QAM signal. In this way the S/N ratio may be accurately determined using only the received I and Q components of the modulated QAM input signal itself. 1. A method of estimating a Signal-to-Noise (S/N) ratio of an input channel carrying a QAM signal , the QAM signal having a defined number of ideal values in demodulated I and Q components , the method comprising:receiving the QAM signal from the input channel;comparing decoded values from a constellation of the decoded QAM signal to ideal constellation values to determine error values for a selected group of constellation ideal values, the selected group of constellation ideal values having a fewer number of values than the defined number of ideal values for the QAM signal constellation;determining a modified Modulation Error Ratio (MER) for the input signal using error values that correspond only to the selected group of constellation ideal values; andascribing the modified MER ratio as the S/N ratio of the input channel carrying the QAM signal.2. The method of estimating a Signal-to-Noise (S/N) ratio of an input channel carrying a QAM signal according to claim 1 , further comprising:demodulating the received QAM signal into the I and Q component values.3. The method of estimating a Signal-to-Noise (S/N) ratio of an input channel carrying a QAM signal according to claim 1 , in which the selected group of constellation ideal values includes only the center-most of the ideal values of the constellation.4. The method of estimating a Signal-to-Noise (S/N) ratio of an input channel carrying a QAM signal according to claim 3 , in ...

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Номер записи: 100