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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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13-07-2017 дата публикации

Многоканальный приемный СВЧ-тракт с шумовой автоматической регулировкой усиления сигналов радиолокационной станции беспилотного летательного аппарата

Номер: RU0000172567U1
Автор: Вячеслав Анатольевич Патрохин, Дмитрий Юрьевич Куприянов, Максим Владимирович Плигин, Михаил Викторович Попихин
Принадлежит: Акционерное общество "Северный пресс"

Полезная модель относится к радиотехнике, а именно к приемникам - преобразователям СВЧ-сигналов и может быть использована для аппаратуры приемного тракта СВЧ-сигналов в системах связи и навигации бортовых радиолокационных станций (РЛС) беспилотных летательных аппаратов (БПЛА).Сущность полезной модели состоит в том, что в многоканальном приемном СВЧ-тракте с шумовой автоматической регулировкой усиления сигналов РЛС БПЛА, содержащем блок управления и контроля (БУК) с выходами сигналов управления, делитель мощности (ДМ) и, по меньшей мере, первый, второй и третий приемные каналы (ПК), каждый из которых состоит из первого малошумящего усилителя (МШУ), смесителя частот сигнала, первого, второго и третьего полосно-пропускающих фильтров (ППФ), первого, второго, третьего и четвертого усилителей сигнала (УС), усилителя промежуточной частоты, первого управляемого аттенюатора (УА) и первого коммутатора (КТ), в состав введены синтезатор СВЧ-сигналов, усилитель сигнала гетеродина, полосовой фильтр, формирователь синхросигналов и аналого-цифровой преобразователь, кроме того, каждый ПК дополнительно снабжен вторым МШУ, блоком шумовой автоматической регулировки усиления сигналов в виде, последовательно соединенных упомянутого первого КТ, третьего МШУ, второго УА, четвертого МШУ и второго КТ, а также пятым МШУ, направленным ответвителем, логарифмическим детектором, дифференциальным фильтром, четвертым и пятым ППФ и квадратурным демодулятором, а БУК снабжен контрольными входами сигналов обратной связи.Технический результат заключается в повышении дальности обнаружения целей, разрешающей способности и чувствительности. Ц 1 172567 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ арх в д 03) 172 567? 1 х х < хх“ к $ п РЦ ‘’ (50) МПК НОЧВ 1/16 (2006.01) (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (21)(22) Заявка: 2016136592, 12.09.2016 (24) Дата начала отсчета срока действия патента: 12.09.2016 Дата регистрации: 13.07.2017 Приоритет(ы): (22) Дата подачи ...

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Номер записи: 1
13-11-2018 дата публикации

Устройство формирования мягкого решения демодулятора сигнала четвертичной фазовой манипуляции со сглаживанием и сдвигом

Номер: RU0000184852U1
Автор: Алексей Анатольевич Парамонов, Анатолий Иванович Стариковский, Михаил Юрьевич Баланов
Принадлежит: Российская Федерация, от имени которой выступает Государственная корпорация по космической деятельности &#34;РОСКОСМОС&#34;

Полезная модель относится к системам радиосвязи, использующим для передачи цифровой информации способ модуляции SOQPSK (shaped offset quadrature phase shift keying - четверичная фазовая манипуляция со сглаживанием и сдвигом, вид частотной манипуляции сигналов с непрерывной фазой) и может использоваться в устройствах с демодулятором Витерби, формирующим на своем выходе решение в «мягком» виде. Требуемый технический результат, заключающийся в повышении помехоустойчивости и уменьшении сложности демодулятора, достигается в устройстве, содержащем демодулятор Витерби, линии задержки, блоки выбора минимума, блоки вычитания. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 184 852 U1 (51) МПК H04L 27/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК H04L 27/06 (2006.01) (21)(22) Заявка: 2018117476, 11.05.2018 (24) Дата начала отсчета срока действия патента: Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 11.05.2018 (56) Список документов, цитированных в отчете о поиске: RU 2248678 C2, 20.03.2005. RU (45) Опубликовано: 13.11.2018 Бюл. № 32 (54) Устройство формирования мягкого решения демодулятора сигнала четвертичной фазовой манипуляции со сглаживанием и сдвигом (57) Реферат: Полезная модель относится к системам демодулятором Витерби, формирующим на своем радиосвязи, использующим для передачи выходе решение в «мягком» виде. Требуемый цифровой информации способ модуляции SOQPSK технический результат, заключающийся в (shaped offset quadrature phase shift keying повышении помехоустойчивости и уменьшении четверичная фазовая манипуляция со сложности демодулятора, достигается в сглаживанием и сдвигом, вид частотной устройстве, содержащем демодулятор Витерби, манипуляции сигналов с непрерывной фазой) и линии задержки, блоки выбора минимума, блоки может использоваться в устройствах с вычитания. R U 1 8 4 8 5 2 2247471 C2, 10.06.2003. US 6865236 B1, 08.03.2005. US 2002/0067777 A1, 06.06.2002. Стр.: 1 U 1 U 1 Адрес для ...

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Номер записи: 2
02-02-2012 дата публикации

Demodulation circuit, digital microwave system and demodulation method

Номер: US20120027129A1
Автор: Guixue Zhao, Tianxiang Wang
Принадлежит: Huawei Technologies Co Ltd

A demodulation circuit, a digital microwave system including the demodulation circuit, and a signal demodulation method are provided. The demodulation circuit includes a first circuit, a second circuit, a third circuit, and a fourth circuit connected in turn. The fourth circuit includes a pulse counting unit and a data decision unit connected in turn. The signal demodulation method includes: performing bandpass filtering on input signals; increasing gains of the bandpass filtered signals; extracting pulse signals are extracted from the gain-increased signals; counting the extracted pulse signals; filtering the pulse signals having counting values falling outside of a predetermined range, and outputting the filtered pulse signals.

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Номер записи: 3
01-03-2012 дата публикации

Hybrid equalization system

Номер: US20120051418A1
Автор: Fang-Ming Yang
Принадлежит: Sunplus Technology Co Ltd

A hybrid equalization system includes an equalization device, a target channel impulse response device, a maximum likelihood sequence estimation device and a multiplexer. The equalization device receives a sampled baseband signal and performs an equalization operation thereon for generating first estimated symbols. The target channel impulse response device convolutes the first estimated symbol and a predetermined target channel response function for generating a training symbol corresponding to a target channel. The maximum likelihood sequence estimation device performs a maximum likelihood sequence estimation on the sampled baseband signal trained by first estimated symbols based on the target channel impulse response for generating second estimated symbols. The multiplexer selects the first estimated symbol or the second estimated symbol as an output of the hybrid equalization system according to a selection signal.

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Номер записи: 4
29-03-2012 дата публикации

Decision directed timing recovery using multi-phase detection

Номер: US20120076196A1
Автор: Jason Bellorado, Marcus Marrow
Принадлежит: Link A Media Devices Corp

A set of one or more samples is received. Using a first signal processor associated with a first phase offset, a first decision and a first error value are generated using the set of samples. Using a second signal processor associated with a second phase offset, a second decision and a second error value are generated using the set of samples. This includes interpolating the set of samples to obtain a set of interpolated samples at the second phase offset and generating the second decision and the second error value using the set of interpolated samples at the second phase offset. A selection associated with the first decision and the second decision is made based at least in part on the first error value and the second error value.

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Номер записи: 5
10-05-2012 дата публикации

Successive transmit beamforming methods for multiple-antenna orthogonal frequency division multiplexing (ofdm) systems

Номер: US20120114072A1
Автор: Hamid Jafarkhani, Li Liu
Принадлежит: UNIVERSITY OF CALIFORNIA

An improvement in a method of transmit beamforming between a transmitter and a receiver in an OFDM wireless system having a plurality of subcarriers for a time varying fading channel comprises performing successive beamforming for each of the plurality of subcarriers using less than complete knowledge of the previous fading blocks for the subcarriers by beamforming an adaptive codebook, C=(C 1 ; . . . ; c 2 N }, of a current fading block for the subcarriers by correlating inter-frame and/or inter-subcarrier signals among the plurality of subcarriers.

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Номер записи: 6
31-05-2012 дата публикации

Detection apparatus, detection method, and reception apparatus

Номер: US20120134448A1
Автор: Hiroaki Nakano, Shinichi Fukuda
Принадлежит: Sony Corp

A detection apparatus detects, from a carrier signal which has been subjected to load modulation in accordance with information to be transmitted, the information. The detection apparatus includes a buffer configured to buffer the received carrier signal which has been subjected to the load modulation, and a detector configured to perform detection on the buffered carrier signal which has been subjected to the load modulation so as to detect the information.

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Номер записи: 7
16-08-2012 дата публикации

Analog Continuous-Time Phase Equalizer for Data Transmission

Номер: US20120207203A1
Автор: Yasuo Hidaka
Принадлежит: Fujitsu Ltd

In particular embodiments, a method includes receiving as an input signal a phase-distorted signal or a transmitted-data signal, the phase-distorted signal having been distorted from a phase-equalized signal by transmission across a communication channel, the transmitted-data signal comprising transmitted data; generating a non-derivative version of the input signal by applying a delay operator in a continuous-time domain to the input signal; generating a derivative version of the input signal by applying a derivative operator in a continuous-time domain to the input signal; generating a first product signal by multiplying the non-derivative version of the input signal by a first coefficient, the first coefficient being a positive number; generating a second product signal by multiplying the derivative version of the input signal by a second coefficient, the second coefficient being a negative number; and generating an output signal by summing the first and second product signals.

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Номер записи: 8
14-03-2013 дата публикации

Techniques for setting feedback coefficients of a pam-n decision feedback equalizer

Номер: US20130064281A1
Автор: Dan Raphaeli, Yaron Slezak
Принадлежит: TranSwitch Corp

A decision feedback equalizer (DFE) for equalizing PAM-N signals comprises a coefficient setting unit for setting a first group of most significant feedback coefficients of the DFE to a predefined value selected from a group of predefined values; a coefficients computation unit coupled to the coefficient setting unit for computing values of feedback coefficients of a second group of feedback coefficients other than the first group of most significant feedback coefficients; a feedback (FB) unit for mitigating, using a complete group of feedback coefficients, effects of interference from data symbols that are adjacent in time to an input data symbol, wherein most significant feedback coefficients of the first group are set to an optimal value computed during an initialization of the DFE and feedback coefficients of the second group are computed by the coefficients computation unit.

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Номер записи: 9
04-04-2013 дата публикации

CONCATENTATION-ASSISTED SYMBOL-LEVEL COMBINING FOR MIMO SYSTEMS WITH HARQ AND/OR REPETITION CODING

Номер: US20130083836A1
Автор: Jang Woong Jun, Lee Jungwon, SONG Leilei
Принадлежит: MARVELL WORLD TRADE LTD.

Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors from the same transmitted vector. The receiver combines the received vectors by vector concatenation The concatenated vector may then be decoded using, for example, maximum-likelihood decoding. In some embodiments, the combined signal vector is equalized before decoding. 120-. (canceled)21. A method for decoding a signal vector in a multiple-input multiple-output transmission scheme , comprising:{'sub': r', 't', 'r', 't, 'receiving, with a receiver, multiple signal vectors of a first dimension (N) corresponding to a common transmit signal vector of a second dimension (N), wherein each of the received signal vectors is associated with a channel response matrix of dimension N×N;'}{'sub': 'r', 'concatenating, with vector combining circuitry, K of the received signal vectors into a combined received signal vector of dimension KN, wherein K is an integer variable greater than one;'}{'sub': r', 't, 'concatenating, with matrix combining circuitry, K of the channel response matrices into a combined channel response matrix of dimension KN×N;'}{'sub': t', 't', 'r, 'processing, with processing circuitry, the combined received signal vector to produce a signal vector of dimension N, wherein N Подробнее

Номер записи: 10
04-04-2013 дата публикации

BASE STATION AND RECEIVING METHOD

Номер: US20130083876A1
Автор: Kannari Hideyuki, SUZUKI Yusuke
Принадлежит: FUJITSU LIMITED

A base station includes antennas, a local signal generator; first and second mixers generating first and second mixed signals by mixing first and second signals from first and second antenna among the antennas and the local signal; first and second analog digital converters converting to first and second digital signals, first and second interference detecting units detecting first and second interference signals based on the first and second digital signals; first and second interference removing units generating first and second processed signals by removing the first and second interference signals by first and second filters having first and second filter central frequencies shifted in first and second directions from first and second interference central frequencies of the first and second interference signals, respectively; and a combining unit combining the first and second processed signals. 1. A base station comprising:a plurality of antennas;a local signal generator configured to generate a local signal;a first mixer configured to generate a first mixed signal obtained by mixing a first signal from a first antenna among the antennas and the local signal from the local signal generator;a first analog digital converter configured to convert the first mixed signal to a first digital signal;a first interference detecting unit configured to detect a first interference signal based on the first digital signal;a first interference removing unit configured to generate a first processed signal by removing the first interference signal by a first filter having a first filter central frequency which is shifted in a first direction from a first interference central frequency of the first interference signal;a second mixer configured to generate a second mixed signal obtained by mixing a second signal from a second antenna among the antennas and the local signal from the local signal generator;a second analog digital converter configured to convert the second mixed ...

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Номер записи: 11
11-04-2013 дата публикации

METHOD OF DEMODULATING MDCM SIGNAL USING HARD DECISION AND METHOD OF DEMODULATING MDCM SIGNAL USING SOFT DECISION

Номер: US20130089121A1
Автор: Kim Jae Seok, KIM Kil Hwan, KOO Ji Hun, PARK Jang Yong
Принадлежит:

A method of demodulating a modified dual carrier modulation (MDCM) signal using hard decision includes generating real symbol vector candidates and imaginary symbol vector candidates which correspond to an MDCM signal pair; calculating a first norm between a real part of the MDCM signal pair and each of the real symbol vector candidates and determining as a real symbol vector a real symbol vector candidate that has the minimum first norm among the real symbol vector candidates; and calculating a second norm between an imaginary part of the MDCM signal pair and each of the imaginary symbol vector candidates and determining as an imaginary symbol vector an imaginary symbol vector candidate that has the minimum second norm among the imaginary symbol vector candidates. 1. A method of demodulating a modified dual carrier modulation (MDCM) signal using hard decision , the method comprising:generating real symbol vector candidates and imaginary symbol vector candidates that correspond to an MDCM signal pair;calculating a first norm between the real part of the MDCM signal pair and each of the real symbol vector candidates and selecting from among the real symbol vector candidates a real symbol vector candidate that has the minimum first norm as the real symbol vector; andcalculating a second norm between the imaginary part of the MDCM signal pair and each of the imaginary symbol vector candidates and selecting from among the imaginary symbol vector candidates an imaginary symbol vector candidate that has the minimum second norm as the imaginary symbol vector.2. The method of claim 1 , wherein the generating the real symbol vector candidates and the imaginary symbol vector candidates comprises generating real values of constellation points to which the MDCM signal pair can be mapped as the real symbol vector candidates and generating imaginary values of the constellation points to which the MDCM signal pair can be mapped as the imaginary symbol vector candidates.3. The ...

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Номер записи: 12
18-04-2013 дата публикации

Ofdm communication system and method having a reduced peak-to-average power ratio

Номер: US20130094614A1
Автор: Leonard Joseph Cimini, Jr., Nelson Ray Sollenberger
Принадлежит: AT&T Corp

An OFDM system embeds sequence information in the transmitted signal that reduces peak average power ratio (PAP) with minimal impact on the overall system efficiency. A marker is embedded onto the transmitted information that is used to identify the combining (inversion) sequence at the receiver. In one embodiment, selected tones in a cluster are rotated when the corresponding phase factor rotates the cluster.

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Номер записи: 13
18-04-2013 дата публикации

DIGITAL BROADCAST RECEIVER APPARATUS AND DIGITAL BROADCAST RECEPTION METHOD

Номер: US20130094617A1
Автор: MURAKAMI Shinichi, Shirosugi Takatoshi
Принадлежит:

This invention provides detailed operations of a transmitter apparatus and a receiver apparatus that are capable of reproducing, possibly without delays, up-to-the minute earthquake reports conveyed via digital broadcasts. There are included a receiving unit for receiving the conveyed signal; a broadcast modulating unit for demodulating the digital broadcast signal from the conveyed signal received by the receiving unit; an emergency alarm broadcast activation flag detecting unit for detecting the emergency alarm broadcast activation flag from the conveyed signal received by the receiving unit; and an earthquake movement alarm information demodulating unit for demodulating the earthquake movement alarm information signal from the conveyed signal received by the receiving unit. 1. A digital broadcast receiver apparatus for receiving a transmission signal having a digital broadcast signal , including a broadcast video signal or a broadcast audio signal , an emergency alarm broadcast activation flag for indication that an emergency alarm broadcast is activated , a start/end flag for indicating that an earthquake alarm is issued , and an earthquake alarm information signal , being information for showing contents of said earthquake alarm , including signal discrimination information for converting into an earthquake video signal and an earthquake audio signal , comprising:a receiver portion, which is configured to receive said transmission signal;a broadcast demodulator portion, which is configured to demodulate said digital broadcast signal from the transmission signal received by said receiver portion;an emergency alarm broadcast activation flag detector portion, which is configured to detect said emergency alarm broadcast activation flag from the transmission signal received by said receiver portion;an earthquake alarm information demodulator portion, which is configured to demodulate said earthquake alarm information signal from the transmission signal received by ...

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Номер записи: 14
18-04-2013 дата публикации

ESTIMATION OF A MULTIPATH SIGNAL IN A WIRELESS COMMUNICATION SYSTEM

Номер: US20130094620A1
Автор: Alexander Paul Dean, Grant Alexander James, Haley David Victor Lawrie, Letzepis Nick
Принадлежит: Cohda Wireless Pty. Ltd.

Described herein is a method and system for estimating a time-varying multipath communication channel. The system comprises a receiver for receiving a signal comprising a data packet transmitted over the multipath communication channel. The system also comprises a frequency-domain channel estimator that generates a frequency-domain channel estimate based on the received signal. The system further comprises a time-domain channel modeller that receives the frequency-domain channel estimate and generates an estimate of parameters in a time-domain model of the multipath communication channel. The model characterises the multipath communication channel as a delay line with a plurality of taps, each tap having tap parameters defining a delay, a Doppler and a gain for the tap. The tap parameters are constant over the data packet. 1. A method of estimating a time-varying multipath communication channel , the method comprising:receiving a signal comprising a data packet transmitted over the multipath communication channel; and, from the received signalgenerating an estimate of tap parameters in a model of the multipath communication channel, the model characterising the multipath communication channel as a delay line with a plurality of taps, each tap having tap parameters for estimation defining a delay, a Doppler and a complex gain for the tap,wherein the estimated tap parameters are constant for the data packet.2. The method of wherein the data packet is an orthogonal frequency division multiplex (OFDM) packet.3. A method of estimating a time-varying multipath communication channel claim 1 , the method comprising:receiving a frequency-domain channel estimate of the multipath communication channel, the frequency-domain estimate deriving from the data packet transmitted over the multipath communication channel; and, based on the frequency-domain estimategenerating an estimate of tap parameters in a time-domain model of the multipath communication channel, the time-domain ...

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Номер записи: 15
02-05-2013 дата публикации

Phase detection in digital communication receivers

Номер: US20130107992A1
Автор: Bernard Arambepola, Parveen K. Shukla, Sahan S. Gamage, Thushara Hewavithana
Принадлежит: Intel Corp

According to various embodiments, apparatus and methods disclosed herein include computing phase error of a received signal based on an estimate of a first component (e.g., in-phase component) of a transmitted signal and an analytic representation of the estimate of the first component of the transmitted signal. The analytic representation of the estimate of the first component of the transmitted signal may represent an estimate of a second component (e.g., quadrature phase component) of the transmitted signal. The analytic representation of the estimated first component may be computed using at least one of a Hilbert transform or Fourier transform on the estimated first component of the transmitted signal.

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Номер записи: 16
09-05-2013 дата публикации

DATA PROCESSING APPARATUS AND METHOD FOR INTERLEAVING AND DEINTERLEAVING DATA

Номер: US20130114760A1
Автор: Atungsiri Samuel Asangbeng, Taylor Matthew Paul Athol, Wilson John Nicholas
Принадлежит: SONY CORPORATION

A data processing apparatus is arranged to map input data symbols to be communicated onto a predetermined number of sub-carrier signals of Orthogonal Frequency Division Multiplexed OFDM symbols. The predetermined number of sub-carrier signals is determined in accordance with one of a plurality of operating modes and the input data symbols are divided into first sets of input data symbols and second sets of input data symbols. 1. A data processing apparatus configured to map data symbols received from a predetermined number of sub-carrier signals of Orthogonal Frequency Division Multiplexed OFDM symbols into an output data stream , whereinthe predetermined number of sub-carrier signals are determined in accordance with one of a plurality of operating modes and the data symbols are divided into first sets of data symbols and second sets of data symbols, the data processing apparatus comprising:an interleaver configured to perform an odd interleaving process which interleaves the first sets of data symbols from the sub-carrier signals of first OFDM symbols into an output data stream and an even interleaving process which interleaves the second sets of data symbols from the sub-carrier signals of second OFDM symbols into the output data stream, andan interleaver memory,the odd interleaving process includingwriting the first sets of data symbols recovered from the sub-carrier signals of the first OFDM symbols into the interleaver memory in accordance with an order defined by a permutation code, andreading out the first sets of data symbols from the interleaver memory in a accordance with a sequential order into the output data stream,the even interleaving process includingwriting the second sets of data symbols recovered from the sub-carrier signals of the second OFDM symbols into the interleaver memory in accordance with a sequential order, andreading out the second sets of data symbols from the interleaver memory in accordance with an order defined by the permutation ...

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Номер записи: 17
09-05-2013 дата публикации

Synchronizing and Detecting Interference in Wireless Receiver

Номер: US20130115904A1
Автор: Kapoor Ajay, Stassen Maurice
Принадлежит: ST-Ericsson SA

Interference detection involves detecting the interference component in the received signal if there is such a component, controlling a band reject filter according to the detected interference component to filter the received signal to suppress the interference component, and synchronizing the receiver to the received signal, wherein the step of detecting the interference component is started before synchronization is achieved. By starting the interference detection without waiting for synchronization to be achieved, rather than following the synchronization, then the interference detection is no longer dependent on the synchronization being achieved. 1. A method of interference detection in a wireless receiver for receiving a signal having a wanted component and a possible in-band interference component , the method comprising the steps of:{'b': '110', 'detecting () the interference component in the received signal if there is such a component,'}{'b': '120', 'controlling () a band reject filter according to the detected interference component to filter the received signal to suppress the interference component, and'}{'b': '130', 'synchronizing () the receiver to the received signal, wherein the step of detecting the interference component is started before synchronization is achieved.'}2. The method of claim 1 , the synchronizing step being carried out at least partly on the filtered received signal.3. The method of or claim 1 , the synchronizing step being carried out in series claim 1 , following the steps of detecting the interference component and filtering claim 1 , orthe synchronizing step being carried out in parallel with the step of detecting the interference component.4570. The method of any preceding claim claim 1 , the step of controlling of filtering involving adjusting an analog notch filter () according to the detected interference.5. The method of any preceding claim having the step of adjusting a gain of the received signal following the filtering ...

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Номер записи: 18
16-05-2013 дата публикации

CHANNEL ESTIMATION AND EQUALIZATION FOR HARD-LIMITED SIGNALS

Номер: US20130121448A1
Автор: Hui Dennis, Zangi Kambiz
Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

The present invention provides a method and apparatus for channel estimation when the amplitude of a received signal is hard-limited. A channel estimator computes amplitude estimates for the received signal based on the phase samples of the received signal. The amplitude estimates may comprise the expected values of the amplitude given the phase samples. The channel estimator then computes revised channel estimates based on the amplitude estimates and the phase samples. The process may be performed iteratively to refine the channel estimates during each iteration. 1. A method of generating channel estimates for a received signal that is hard-limited based on phase samples of the received signal , said method comprising:computing expected amplitude values for the received signal based on the phase samples; andcomputing revised channel estimates based on the expected amplitude values and the phase samples.2. The method of wherein the computation of the expected amplitude values for the received signal is based further on a previous noise statistic.3. The method of wherein the expected amplitude values for the received signal and the revised channel estimates are computed iteratively.4. The method of wherein the computation of the expected amplitude values for the received signal is based further on previous channel estimates.5. The method of wherein the expected amplitude values for the received signal and the revised channel estimates are computed iteratively.6. The method of wherein the revised channel estimates computed during each iteration are available as the previous channel estimates for a subsequent iteration.7. The method of wherein the computation of the expected amplitude values for the received signal is based further on a previous noise statistic.8. The method of further comprising computing a revised noise statistic during each iteration claim 7 , wherein the revised noise statistic computed during each iteration is available as the previous noise ...

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Номер записи: 19
16-05-2013 дата публикации

NOISE CANCELING CONTROL APPARATUS, RECORDING MEDIUM, AND NOISE CANCELING CONTROL METHOD

Номер: US20130122844A1
Автор: Itasaki Akira, SHIOTSU Shinichi, YOKOTA Koichi
Принадлежит: FUJITSU LIMITED

A noise canceling control apparatus obtains information about current communication quality of a terminal, obtains a terminal state, obtains canceling parameters and data indicating the degree of a canceling effect from a holding unit configured to make an association among a terminal state, canceling parameters used when a canceling process is executed for a noise, and data indicating the degree of a canceling effect, and to record the terminal state, the canceling parameters, and the data, calculates communication quality when the canceling process is assumed to be executed for the terminal by using the obtained canceling parameters using the information about the current communication quality, and the data indicating the degree of the canceling effect, outputs canceling parameters with which the communication quality is predicted to be obtained, and executes the canceling process for the noise that occurs within the terminal by using the output canceling parameters. 1. A noise canceling control apparatus for a terminal including a reception antenna , the noise canceling control apparatus comprising:a communication quality information obtainment unit configured to obtain information about current communication quality of the terminal;a terminal state obtainment unit configured to obtain a terminal state of the terminal in which a canceling process for a noise that occurs within the terminal is to be executed;a canceling effect data holding unit configured to make an association among at least a terminal state, canceling parameters used when the canceling process is executed for the noise that occurs within the terminal, and data indicating a degree of a canceling effect when the canceling process is executed by using the canceling parameters, and to record the terminal state, the canceling parameters, and the data;a canceling effect data obtainment unit configured to obtain, from the canceling effect data holding unit, canceling parameters and data indicating the ...

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Номер записи: 20
16-05-2013 дата публикации

METHOD AND SYSTEM FOR WIRELESS COMMUNICATIONS BETWEEN BASE AND MOBILE STATIONS

Номер: US20130122848A1
Автор: Dehner Leo G., McCoy James W., TRAYLOR KEVIN B.
Принадлежит: Apple Inc.

A method and system for wireless communications between base and mobile stations use reference signals transmitted from base stations prior transmission of data signals. The reference signals are used to determine propagation characteristics of communication channels between me base and mobile stations and optimize, in real time, parameters of receivers of the mobile stations for processing the following data signals. Applications of the invention include wireless communication systems compliant with OFDMA, 3GPP LTE, RFN-OFDMA, OFDM, TDMA, and the like communication protocols. 132.-. (canceled)33. A method for receiving one or more reference signals and one or more data signals , where each reference signal immediately precedes a corresponding data signal , and where the one or more reference signals have a predetermined periodicity , the method comprising:switching into an active state before the arrival of a first reference signal;receiving the first reference signal;determining at least one propagation characteristic of a communication channel based at least in part on the received first reference signal; andoptimizing reception of a first data signal corresponding to the first reference signal based on the at least one propagation characteristic of the communication channel.34. The method of claim 33 , further comprising claim 33 , subsequent to reception of the first data signal claim 33 , switching into a standby state.35. The method of claim 34 , further comprising switching into an active state before the arrival of each one of the one or more reference signals based on a the predetermined periodicity.36. The method of claim 33 , where the one or more reference signals comprise Constant Amplitude Zero Auto-Correlation (CAZAC) sequences.37. The method of claim 33 , where the communication channel comprises an Orthogonal Frequency Division Multiple Access (OFDMA) channel.38. The method of claim 33 , where the reference signal is determined by (i) a time- ...

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Номер записи: 21
23-05-2013 дата публикации

RECEIVER AND TRANSMITTER OF COPING WITH INTERFERENCE IN SUPER-REGENERATIVE COMMUNICATION SYSTEM, AND METHOD OF USING THE RECEIVER AND THE TRANSMITTER

Номер: US20130128934A1
Автор: Hwang Hyo Sun, Kang Joon Seong, LEE Jae Sup
Принадлежит:

A receiver and a transmitter that copes with interference in a super-regenerative communication system, and a method of using the receiver and the transmitter, are provided. A super-regenerative receiver includes a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter. The super-regenerative receiver further includes an oscillation signal generating unit configured to generate an oscillation signal, using a positive feedback amplification, based on the resonance frequency and the transmission signal. The super-regenerative receiver further includes an oscillation characteristic detecting unit configured to detect a characteristic of the oscillation signal. The super-regenerative receiver further includes a determining unit configured to determine whether interference is included in the transmission signal based on the characteristic of the oscillation signal and the resonance frequency. 1. A super-regenerative receiver comprising:a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter;an oscillation signal generating unit configured to generate an oscillation signal, using a positive feedback amplification, based on the resonance frequency and the transmission signal;an oscillation characteristic detecting unit configured to detect a characteristic of the oscillation signal; anda determining unit configured to determine whether interference is included in the transmission signal based on the characteristic of the oscillation signal and the resonance frequency.2. The super-regenerative receiver of claim 1 , further comprising:a control unit configured to control the resonance frequency adjusting unit to adjust the resonance frequency based on a determination result of the determining unit.3. The super-regenerative receiver of claim 1 , ...

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Номер записи: 22
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: 23
23-05-2013 дата публикации

ELECTRONIC DEVICE COMPRISING AN OPERATING MODE SWITCHING UNIT

Номер: US20130130636A1
Автор: GAMM GERD ULRICH, Ostertag Thomas, REINDL LEONHARD MICHAEL, SIPPEL MATTHIAS, UNGAN TOLGAY, WENDT THOMAS
Принадлежит: SMARTEXERGY GMBH

An electronic appliance comprising an electrical circuit and an operating mode switching unit which can be awakened out of a sleep state into a working state in which the current consumption of the circuit is greater in than in the sleep state. To receive a radio signal, the appliance has a receiver comprising a UHF carrier that is amplitude-modulated by a modulation signal. The receiver comprises a UHF antenna connected to a passive filter stage to an input of a passive rectifier circuit. An output of the rectifier circuit is connected to a detector for the modulation signal. To wake the electrical circuit from the sleep state, the operating mode switching unit has a control connection to the detector. The appliance has a low current draw in the sleep state by matching the output impedance of the rectifier circuit to the input impedance of the detector. 11186878161816816. An electronic appliance () having an electrical circuit and an operating mode switching device () which is associated with the latter and which can be used to wake the electrical circuit from a quiescent state into an operating state in which the current draw of the electrical circuit is greater than in the quiescent state , having a receiver for receiving a radio signal which has a UHF carrier which has been subjected to amplitude modulation with a modulation signal , wherein the receiver has a UHF antenna () which is connected to an input of a passive rectifier circuit () via a passive filter stage () , wherein an output of the passive rectifier circuit () is connected to a detection device () for the modulation signal , and wherein the operating mode switching device () has a control connection to the detection device () for the purpose of waking the electrical circuit which is in the quiescent state , the improvement which comprises: means for matching the output impedance of the rectifier circuit () to the input impedance of the detection device ().2181698167912. The electronic appliance () ...

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Номер записи: 24
30-05-2013 дата публикации

RECEPTION DEVICE

Номер: US20130136165A1
Автор: Sakamoto Takenori, Shirakata Naganori, Yosoku Naoya
Принадлежит: Panasonic Corporation

An FFT unit subjects a P-times oversampling output of an AD converter to Fourier transform into a frequency domain signal. A distortion estimation unit estimates a distortion characteristic from a difference between the frequency domain signal and a reference signal. A correction coefficient calculation unit calculates a correction coefficient of a distortion characteristic. A correction unit corrects the frequency domain signal by using the correction coefficient. An IFFT unit subjects the corrected frequency domain signal to inverse Fourier into a time domain signal having the same sampling speed as a symbol speed, and outputs a partial time series. 1. A reception device configured to receive a modulated transmit signal by using a single carrier transmission system , the reception device comprising:an AD converter configured to oversample a receive signal at a speed P times (P is an integer of 1 or more) as high as a symbol speed;a Fourier transform unit configured to select time domain signals of P×N points corresponding to N symbols from outputs of the AD converter, configured to subject the time domain signals of P×N points to Fourier transform into frequency domain signals of P×N points, and configured to output the frequency domain signals of N points corresponding to a receive signal bandwidth among the frequency domain signals of the P×N points;a distortion estimation unit configured to estimate a distortion characteristic or a phase error characteristic from a difference between frequency domain signals of first N points for calculating a correction coefficient among the frequency domain signals of N points output from the Fourier transform unit, and a frequency domain signal of a known reference signal by the reception device;a correction coefficient calculation unit configured to calculate a correction coefficient for correcting the distortion characteristic or the phase error characteristic;a correction unit configured to multiply frequency domain ...

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Номер записи: 25
30-05-2013 дата публикации

Radio Receiver Power Management Systems and Methods

Номер: US20130137389A1
Автор: HABER George T., MURGULESCU Mihai H.
Принадлежит: CRESTA TECHNOLOGY CORPORATION

According to some embodiments, an analog radio receiver circuit is configured alternatively in a full-power mode when the receiver is situated in a cradle and connected to an external power source, and in a power-saving mode when the receiver is not connected to the external power source. In the power-saving mode, a scaled-down power level is supplied to an analog radio signal processing circuit component such as an amplifier, filter, oscillator, or mixer. Scaling down the power supplied to analog circuit components allows reducing their power consumption, at the expense of degraded circuit performance (e.g. increased non-linearity and intermodulation, decreased filter selectivity). Switching between full-power and power-saving modes may be achieved by controlling the connection of internal nodes of the signal processing circuit to a power source, and/or inserting circuit components (e.g. resistors, active devices, filter poles) into the signal processing circuit. 1. A method comprising:in response to determining that a radio-frequency receiver is connected to an external power source, setting a circuit configuration of an analog circuit component of an analog signal-processing circuit of the radio-frequency receiver to a full-power configuration to generate a full-power-consumption radio-frequency receiver output signal; andin response to determining that the radio-frequency receiver is not connected to an external power source, setting the circuit configuration of the analog circuit component to a power-saving, scaled-down power configuration to generate a reduced-power-consumption radio-frequency receiver output signal encoding content to be played back to a radio-frequency receiver end user;wherein switching the configuration of the analog circuit component between the full-power configuration and the power-saving, scaled-down power configuration comprises activating or de-activating a first part of the analog circuit component, wherein a second part of the ...

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Номер записи: 26
06-06-2013 дата публикации

Pattern detector for serializer-deserializer adaptation

Номер: US20130142245A1
Автор: Amaresh V. Malipatil, Lane A. Smith, Mohammed S. Mobin, Pervez M. Aziz, Vladimir Sindalovsky
Принадлежит: LSI Corp

In described embodiments, a Serializer-Deserializer (SerDes) receiver includes a pattern detector that allows for detection of insufficiently randomized pattern periods and low activity periods. A freeze of equalization adaptation during these periods might occur by embedding disqualifying patterns into adaptation data. Some embodiments also allow for detection of long intervals of freeze, and so delay a freeze de-assertion in order for a clock and data recovery (CDR) circuit of the receiver to regain lock to the serial data. Embedding freeze information in the receive data allows for precise synchronization of receive data and freeze.

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Номер записи: 27
06-06-2013 дата публикации

WIRELESS DEVICE AND RECEIVING METHOD

Номер: US20130142294A1
Автор: Morita Tadashi
Принадлежит: Panasonic Corporation

The purpose of the present invention is to shorten a time required to perform Auto Gain Control (AGC) processing in a wireless device that can be applied to a plurality of wireless systems. On the basis of a first gain adjusted by means of a gain control unit (-), an initial gain setting unit () sets, for a variable gain unit (-), an initial gain (converted second initial gain) at the start of gain adjustment. Then, a gain control unit (-) sets the initial gain to a second gain at the time of starting the gain adjustment, and adjusts the second gain on the basis of IQ signals of a system, the IQ signals having the level adjusted by means of the variable gain unit (-). 1. A wireless device , comprising:a first antenna that receives a first signal modulated by a first wireless scheme;a second antenna that receives a second signal modulated by a second wireless scheme;a first variable gain section that adjusts a level of the first signal;a second variable gain section that adjusts a level of the second signal;a first gain control section that adjusts a first gain based on the first signal whose level has been adjusted by the first variable gain section, the first gain being a gain of the first variable gain section;a. setting section that sets an initial gain based on the first signal, the initial gain being a second gain that is a gain of the second variable gain section, the initial gain being used by the second variable gain section at start of gain adjustment; anda second gain control section that sets the initial gain to the second gain at the start of the gain adjustment, and adjusts the second gain based on the second signal whose level has been adjusted by the second variable gain section.2. The wireless device according to claim 1 , whereinthe setting section sets the initial gain based on the adjusted first gain.3. The wireless device according to claim 2 , whereinthe setting section sets the adjusted first gain to the initial gain.4. The wireless device ...

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Номер записи: 28
20-06-2013 дата публикации

RECEIVING APPARATUS THAT RECEIVES PACKET SIGNAL

Номер: US20130156137A1
Автор: HIGUCHI Keisuke
Принадлежит: SANYO ELECTRIC CO., LTD.

An RF unit receives predetermined signals. The RF unit amplifies the received signals. A gain control unit controls the gain at the RF unit based on the amplified signal and has the RF unit use the controlled gain. The gain control unit performs different controls on the received signals, depending on the case when the received signal is a known signal placed in the beginning of packet signal and the case when the received signal is a signal other than the packet signal. 1. A receiving apparatus comprising:a receiving unit configured to receive a signal;an amplifier configured to amplify the signal received by the receiving unit; anda control unit configured to control a gain in the amplifier based on a signal amplified by the amplifier and configured to have the amplifier use the controlled gain,wherein the control unit performs different controls on the signals received by the receiving unit, depending on a case when the received signal is a known signal placed in the beginning of packet signal or a case when the received signal is a signal other than the packet signal.2. A receiving apparatus according to claim 1 , the control unit including:an averaging unit configured to average the magnitude of signals amplified by the amplifier; anda decision unit configured to determine the gain such that the magnitude averaged by the averaging unit is brought close to a target value,wherein the averaging unit changes an average period depending on the case when the signal received by the receiving unit is a known signal placed in the beginning of packet signal or the case when the signal received by the receiving unit is a signal other than the packet signal.3. A receiving apparatus according to claim 2 , wherein the averaging unit sets the average period of the signals received by the receiving unit such that the average period of the signal other than the packet signal is longer than the average period of the known signal placed in the beginning of the packet signal.4. A ...

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Номер записи: 29
20-06-2013 дата публикации

Method and System for Reducing the Complexity of Multi-Frequency Hypothesis Testing Using an Iterative Approach

Номер: US20130157602A1
Автор: KENT Mark, SWARTS Francis
Принадлежит: BROADCOM CORPORATION

Aspects of a method and system for reducing the complexity of multi-frequency hypothesis testing using an iterative approach may include estimating a frequency offset of a received signal via a plurality of iterative frequency offset hypotheses tests. The iterative frequency offset hypotheses may be adjusted for each iteration. A correlation may be done between a primary synchronization signal (PSS), and one or more frequency offset versions of a received signal to control the adjustment of the iterative frequency offset hypotheses. A frequency of the received local oscillator signal may be adjusted based on the estimated frequency offset. One or more frequency offset version of the received signal may be generated via one or more multiplication, and the multiplication may be achieved via a multiplication signal corresponding to one or more frequency offsets. The frequency offset of the received signal may be estimated via the correlation. 1. An apparatus for processing communication signals in a wireless communication device , comprising:a plurality of multipliers configured to receive a first input signal, wherein the multipliers are configured to offset the first input signal by a plurality of first frequency offsets;a plurality of correlators coupled to the multipliers; and determine a selected frequency offset of the plurality of first frequency offsets that best compensates for an actual frequency offset, from a desired frequency, in the first input signal, and', 'initiate a frequency offset adjustment, based on the selected frequency offset, to be applied to the multipliers., 'a selector coupled to the correlators, wherein the selector is configured to2. The apparatus of claim 1 , wherein the first input signal is a baseband signal input from an antenna.3. The apparatus of claim 1 , wherein the correlators are primary synchronization signal (PSS) correlators.4. The apparatus of claim 3 , wherein the PSS correlators are configured to generate output signals ...

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Номер записи: 30
27-06-2013 дата публикации

Electronic Circuit and Method for Recovering Desired Signals from Carrier Signals by Demodulation as well as a Modem

Номер: US20130163651A1
Автор: Björn HAASE, Stefan Pilz
Принадлежит: Endress and Hauser Conducta Gesellschaft fuer Mess und Regeltechnik mbH and Co KG

An electronic circuit comprising a rectifier which passes only one polarity of a carrier signal; at least one filter, subsequent to the rectifier, for the suppression of at least one frequency range of the carrier signal; a voltage matching network, subsequent to the filter, which is embodied so that it matches the voltage of the desired signal, and leads to one of the two inputs of a comparator, wherein an output of the comparator is switched, depending on the difference between the two inputs, and a feedback network connected in parallel with the comparator, wherein the feedback network connects one of the two inputs of the comparator with the output of the comparator, the feedback network comprises a high-pass characteristic. The invention furthermore comprises a method for the recovering of desired signals from a carrier signal by demodulation and a modem.

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Номер записи: 31
27-06-2013 дата публикации

UNIDIRECTIONAL SAMPLING MIXER

Номер: US20130165066A1
Автор: Law Daniel A., Uhl Brecken H.
Принадлежит: Invertex Corporation

A unidirectional sampling mixer utilizes a stepped phase modulation to shift the frequency of an RF input signal supplied to an RF input switch. An ordered set of phase shift values to be applied to the RF input signal and a set of times each element of which corresponds to a time at which a phase shift value is be applied to the RF signal are determined. For each phase shift value, a controller controls the RF input switch to select an input of a phase shifting device and controls an RF output switch to select an output of the phasing shifting device. The input and the output of the phase shifting device are selected to apply the phase shift value at its corresponding time to the RF input signal. A frequency shifted signal is supplied to an RF output port from an output of the RF output switch. 1. A method for shifting a frequency of a radio frequency (RF) signal in a selected direction , the method comprising:supplying an RF input signal to an RF input switch from an RF input port;determining an ordered set of phase shift values to be applied to the RF input signal;determining a set of times each element of which corresponds to a time at which a phase shift value is to be applied to the RF signal;for each phase shift value within the ordered set of phase shift values, controlling the RF input switch to select an input of a phase shifting device and controlling an RF output switch to select an output of the phasing shifting device, wherein the input of the phase shifting device and the output of the phase shifting device are selected to apply the phase shift value at its corresponding time to the RF input signal; andsupplying to an RF output port a frequency shifted signal from an output of the RF output switch.2. The method of claim 1 , wherein the frequency shifted signal is higher in frequency than the RF input signal.3. The method of claim 1 , wherein the frequency shifted signal is lower in frequency than the RF input signal.4. The method of claim 1 , wherein ...

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Номер записи: 32
11-07-2013 дата публикации

SIGNAL DETECTOR, SIGNAL DETECTION METHOD, AND COMMUNICATION TERMINAL APPARATUS

Номер: US20130177109A1
Автор: Ozaki Kazuyuki
Принадлежит: FUJITSU LIMITED

There is provided a signal detector which includes a correlation emphasis unit configured to generate correlation emphasis signals corresponding to the respective fixed intervals, an autocorrelation matrix generation unit configured to generate an autocorrelation matrix, a noise power estimation unit configured to estimate noise power in the correlation emphasis signals, a noise power matrix generation unit configured to generate, a noise power matrix having noise power components, a noise removal unit configured to remove an influence of noise from the autocorrelation matrix, an eigenvalue calculation unit configured to calculate an eigenvalue of the autocorrelation matrix from which the influence of noise has been removed by the noise removal unit, and a signal judgment unit configured to determine whether a signal transmitted from an external apparatus is included in the received signals. 1. A signal detector comprising:a correlation emphasis unit configured to, based on received signals that are given at fixed intervals and are overlapped with each other, generate correlation emphasis signals corresponding to the respective fixed intervals;an autocorrelation matrix generation unit configured to generate an autocorrelation matrix based on the correlation emphasis signals generated by the correlation emphasis unit;a noise power estimation unit configured to estimate noise power in the correlation emphasis signals;a noise power matrix generation unit configured to generate, based on the autocorrelation matrix and the noise power, a noise power matrix included in the autocorrelation matrix, the noise power matrix having noise power components;a noise removal unit configured to remove, based on the autocorrelation matrix and the noise power matrix, an influence of noise from the autocorrelation matrix;an eigenvalue calculation unit configured to calculate an eigenvalue of the autocorrelation matrix from which the influence of noise has been removed by the noise ...

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Номер записи: 33
11-07-2013 дата публикации

Apparatus and method for performing automatic frequency control

Номер: US20130177111A1
Автор: Duk Hyun YOU
Принадлежит: Electronics and Telecommunications Research Institute ETRI

Disclosed are a device and method for automatically controlling frequency. The automatic frequency control device includes a frequency error detection unit configured to obtain a frequency error detection value of a received carrier, a frequency error prediction unit configured to calculate a first frequency error prediction value on the basis of the frequency error detection value when the frequency error detection value satisfies a preset first criterion, and a frequency error compensation unit configured to calculate a second frequency error prediction value by correcting the first frequency error prediction value, and compensate for a frequency of the carrier on the basis of the second frequency error prediction value when a frequency change rate of the received carrier satisfies a preset second criterion. Therefore, overshoot and undershoot effects are minimized, and thus frequency control may be correctly performed.

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Номер записи: 34
11-07-2013 дата публикации

FRONT END MODULE

Номер: US20130178180A1
Автор: Ebihara Hitoshi, OSHIMA Shinpei
Принадлежит: TAIYO YUDEN CO., LTD.

Provided is a front end module which is provided with an output terminal shared in a plurality of frequency bands and in which insertion losses are suppressed. A front end module in an embodiment includes an antenna terminal, an output terminal, and a switch for selectively connecting the antenna terminal to a first band pass filter configured to cause a signal of a first pass band to pass therethrough or a second band pass filter configured to cause a signal of a second pass band, which is different from the first pass band, to pass therethrough. The front end module may include a phase shifter arranged between the switch and the first band pass filter. 1. A front end module , comprising:an antenna terminal to which a received signal from at least an antenna is inputted;an output terminal;a switch which has a first terminal, a second terminal, and a third terminal, is connected to the antenna terminal via the first terminal, and selectively connects the first terminal to the second terminal or the third terminal;a first transmission channel which transmits the received signal between the second terminal and the output terminal;a second transmission channel which transmits the received signal between the third terminal and the output terminal;a first filter which is provided on the first transmission channel and causes a signal of a first pass band in the received signal to pass therethrough;a second filter which is provided on the second transmission channel and causes a signal of a second pass band, which is different from the first pass band, in the received signal to pass therethrough;a matching circuit which is arranged between the first and second filters and the output terminal; anda first phase shifter which is arranged between the second terminal and the first filter.2. The front end module according to claim 1 , further comprising:a second phase shifter which is arranged between the third terminal and the second filter.3. The front end module according to ...

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Номер записи: 35
08-08-2013 дата публикации

COMMUNICATION APPARATUS AND COMMUNICATION METHOD

Номер: US20130202060A1
Автор: NISHIKAWA Nobuyoshi
Принадлежит: Icom Incorporated

A modulator generates a modulation signal from an input signal, and a serial-parallel converter generates a subcarrier modulation signal from the modulation signal. An IFFT unit performs an inverse fast Fourier transformation on the subcarrier modulation signal to generate first data. An operator multiplies respective elements of the first data by amplitude coefficients, and further adds dispersion coefficients to the multiplication result, the amplitude coefficients being real numbers other than 0 defined for the respective elements, at least one of the amplitude coefficients having a value other than 1, the dispersion coefficients being complex numbers defined for the respective components, and at least one of the dispersion coefficients having a value other than 0. Then, data symbols are generated based on a calculation result. A transmitter transmits a transmission frame including the data symbols to another apparatus via an antenna. 1. A communication apparatus for communicating with another apparatus in orthogonal frequency-division multiplexing wireless communication , the communication apparatus comprising:a modulator that modulates an input signal using a predetermined modulation scheme, and assigns the modulated input signal to subcarriers with frequency components orthogonal to each other, thereby generating a subcarrier modulation signal;a first transformer that performs an inverse fast Fourier transformation on the subcarrier modulation signal to generate first data;an operator that multiplies respective elements of the first data by amplitude coefficients, and that further adds dispersion coefficients to the multiplication result, the amplitude coefficients being real numbers other than 0 defined for the respective elements, at least one of the amplitude coefficients having a value other than 1, the dispersion coefficients being complex numbers defined for the respective elements, and at least one of the dispersion coefficients having a value other ...

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Номер записи: 36
08-08-2013 дата публикации

Frequency Offset Compensation for Multi-carrier Communication Systems

Номер: US20130202069A1
Автор: Nilsson Thomas, Singh Amit
Принадлежит: Telefonaktiebolaget lM Ericsson (publ)

The present disclosure provides a frequency offset compensation technique for use by a multi-carrier receiver. Compared with legacy receiver designs, the technique introduces a new function which correlates various frequency offsets of the different carriers involved in multi-carrier signal transmission and reception. This new function can be coupled with an Automatic Frequency Control (AFC) function which can then utilize the correlation information provided by the new function to achieve significantly better frequency error/offset estimation when the carriers are correlated. As a method aspect, the frequency offset compensation technique comprises the steps of receiving signals modulated on a plurality of carrier frequencies, deriving a frequency offset for each carrier frequency to thereby provide a plurality of frequency offsets corresponding to the plurality of carrier frequencies; correlating these plurality of frequency offsets; and controlling compensation of the frequency offsets based on a result of the correlation. 123-. (canceled)24. A frequency offset compensation method for a multi-carrier receiver , the method comprising:receiving signals on each of a plurality of carriers at respective carrier frequencies;deriving a frequency offset for each carrier frequency;correlating the plurality of frequency offsets corresponding to the plurality of carrier frequencies; andcontrolling compensation of the frequency offsets based on a result of the correlation.25. The method according to claim 24 , wherein deriving the frequency offset for each carrier frequency comprises:deriving a frequency error signal based on a set of reference symbols included in the signal received on the respective carrier; andaccumulating such frequency error signals for each carrier with respect to one or more sets of the reference symbols received on the carrier, to obtain an accumulated frequency error signal for each carrier.26. The method according to claim 25 , wherein correlating ...

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Номер записи: 37
15-08-2013 дата публикации

WIRELESS COMMUNICATION DEVICE

Номер: US20130210377A1
Автор: Kondo Toshinori, Takebe Hiroyuki
Принадлежит: SHARP KABUSHIKI KAISHA

A wireless communication device () carries out diversity reception and a noise cancellation process, and a signal combining section (combining circuit ()) combines a plurality of received signals in a case where the diversity reception is carried out and combines a received signal and a noise signal in the noise cancellation process. 1. A wireless communication device for carrying out diversity reception and a noise cancellation process , the wireless communication device comprising:a signal combining section,the signal combining section combining a plurality of received signals in a case where the diversity reception is carried out, and combining a received signal and a noise signal in the noise cancellation process.2. The wireless communication device as set forth in claim 1 , further comprisinga phase adjustment section,the phase adjustment section adjusting a phase(s) of a part of the plurality of received signals in a case where the diversity reception is carried out and adjusting a phase of the noise signal in the noise cancellation process.3. The wireless communication device as set forth in claim 2 , wherein claim 2 , in a case where the diversity reception is carried out claim 2 , the phase adjustment section adjusts the phase(s) of the part of the plurality of received signals to be identical with a phase(s) of a received signal(s) to be combined with the part of the plurality of received signals in the signal combining section claim 2 , and claim 2 , in the noise cancellation process claim 2 , the phase adjustment section adjusts the phase of the noise signal to be opposite to a phase of a received signal to be combined with the noise signal in the signal combining section.4. The wireless communication device as set forth in claim 2 , further comprisinga switching section for carrying out switching of a signal to be supplied to the phase adjustment section,wherein, in a case where the switching section carries out the switching so that the part of the ...

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Номер записи: 38
22-08-2013 дата публикации

COMMUNICATION APPARATUS AND COMMUNICATION METHOD

Номер: US20130215994A1
Автор: NISHIKAWA Nobuyoshi
Принадлежит: Icom Incorporated

A serial-parallel converter generates a subcarrier modulation signal from a modulation signal which is generated from the input signal by a modulator. An IFFT unit performs an inverse fast Fourier transformation on the subcarrier modulation signal. A divider divides a calculation result to generate first subdata. A disperser adds dispersion coefficients to elements of first subdata. A sorter generates second subdata from post-dispersion first subdata. An operator performs a predetermined calculation using elements in the same line of the post-dispersion first subdata and second subdata. A corrector subtracts correction coefficients from elements of post-average first subdata. A synthesizer arranges post-correction first subdata in positions at the time of division and synthesizes them to generate a baseband signal. A transmitter generates a transmission signal to transmit. 1. A communication apparatus for communicating with another apparatus in orthogonal frequency-division multiplexing wireless communication , the communication apparatus comprising:a modulator that modulates an input signal using a predetermined modulation scheme, and assigns the modulated input signal to subcarriers with frequency components orthogonal to each other, thereby generating a subcarrier modulation signal;a first transformer that performs an inverse fast Fourier transformation on the subcarrier modulation signal;a divider that divides a calculation result by the first transformer into a predetermined number of pieces to generate a plurality pieces of first subdata;a disperser that adds dispersion coefficients, which are complex numbers defined for each first subdata and of which at least one is a complex number other than 0, to values of respective elements of the plurality pieces of first subdata to generate post-dispersion first subdata;a sorter that generates second subdata in which each element of the post-dispersion first subdata is arranged in a position different from a position ...

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Номер записи: 39
29-08-2013 дата публикации

ITERATIVE DEMAPPER

Номер: US20130223574A1
Автор: Cameron Kelly Brian
Принадлежит: BROADCOM CORPORATION

Iterative demapper. Demodulation and/or demapping of a signal (e.g., based on a constellation whose points have a corresponding mapping with associated labels) is performed such that each dimension is processed separately without accounting for influences from the other dimension. For example, the demapping process operates on each respective dimension separately and independently. In some instances, the processing operates iteratively, in that, information identified from processing one of the dimensions is employed in directing the processing in another of the dimensions. Such operation may be performed iteratively by updating/modified information associated with one or more of the dimensions as well. Moreover, decoding may operate in accordance with iterative demapping (e.g., error correction code (ECC) and/or forward error correction (FEC) code by which information bits are encoded) to make estimates of bits within a signal sequence, and those estimates may be used in a subsequent iteration of demapping. 1. An apparatus , comprising:a processor to process a signal to perform a plurality of demapping operations including calculation of a first plurality of probabilities associated with a first dimension of a modulation, having a plurality of constellation points each having a respective label, and, based on a first subset of the first plurality of probabilities, calculation of a second plurality of probabilities associated with a second dimension of the modulation, to generate a first iteration probability of the signal; anda decoder to process the first iteration probability of the signal to generate a first estimate of at least one information bit encoded within the signal; and wherein:the processor to process the at least one information bit encoded within the signal to generate a second iteration probability of the signal; andthe decoder to process the second iteration probability of the signal to generate a second estimate of the at least one information bit ...

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Номер записи: 40
29-08-2013 дата публикации

Modulation method and apparatus for amplitude- or intensity-modulated communication systems

Номер: US20130223850A1
Автор: Erik Agrell, Frank R. Kschischang, Gerhard Kramer, Johnny KAROUT
Принадлежит: Individual

The present invention relates to a method for determining a signaling set, comprising: selecting a first basis function in the form of a symmetric pulse represented by an even function; selecting a second basis function orthogonal to the first basis function; wherein the second basis function is represented by an odd function having a shape determined by a variable parameter; and determining a signaling set comprising a plurality of data signals formed by linear combinations of the first and second basis functions based on a predetermined requirement of the signaling set. The invention also relates to a modulation and demodulation method using the signaling set, a device performing the modulation and demodulation method and to a system incorporating such a device.

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Номер записи: 41
29-08-2013 дата публикации

METHOD OF MODULATION AND DEMODULATION FOR NANO COMMUNICATION, AND RECEIVER USING THE METHOD

Номер: US20130225104A1
Автор: AHN Hyun Gi, LIM Jong Bu
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A receiver for nano communication includes a power source including a cathode and an anode; a cathode unit connected to the cathode of the power source, the cathode unit including a nano device configured to receive a wireless signal modulated according to a predetermined modulation scheme, have at least two different resonant frequencies, and resonate based on a frequency of the wireless signal and the at least two different resonant frequencies; and an anode unit connected to the anode of the power source, the anode unit being configured to detect electrons emitted from the nano device, and demodulate a the wireless signal based on a pattern of the detected electrons. 1. A receiver for nano communication , the receiver comprising:a power source comprising a cathode and an anode; receive a wireless signal modulated according to a predetermined modulation scheme;', 'have at least two different resonant frequencies; and', 'resonate based on a frequency of the wireless signal and the at least two different resonant frequencies; and, 'a cathode unit connected to the cathode of the power source, the cathode unit comprising a nano device configured to detect electrons emitted from the nano device; and', 'demodulate the wireless signal based on a pattern of the detected electrons., 'an anode unit connected to the anode of the power source, the anode unit being configured to2. The receiver of claim 1 , wherein the at least two different resonant frequencies comprise a first resonant frequency and a second resonant frequency; anda resonant direction of the nano device at the first resonant frequency is different from a resonant direction of the nano device at the second resonant frequency.3. The receiver of claim 1 , wherein the at least two different resonant frequencies depend on properties of the nano device;the properties of the nano device comprise a length of the nano device, a width of the nano device, and a thickness of the nano device;the length of the nano device ...

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Номер записи: 42
05-09-2013 дата публикации

STATIONARY ANALOG FM-RECEIVER FOR RECEIVING ANALOG WIRELESSLY TRANSMITTED FM-AUDIO SIGNALS FROM AT LEAST ONE MOBILE UNIT AND A METHOD OF RECEIVING AN ANALOG FREQUENCY-MODULATED AUDIO SIGNAL FROM A MOBILE ANALOG FM-TRANSMITTER

Номер: US20130231057A1
Автор: Bischoff Carsten, Georgi Sebastian
Принадлежит: Sennheiser electronics GmbH & Co. KG

There is provided a stationary analog FM-receiver for receiving analog wirelessly transmitted FM-audio signals from at least one mobile unit. The frequency has a frequency demodulator (FDM) for demodulating the received FM-audio signals. The FM-receiver further has a link quality unit (LQE) for determining a link quality for the wireless transmission of the FM-audio signals. The link quality unit (LQE) has a high-pass filter (HP) with a limit frequency for high-pass filtration of an output signal of the frequency demodulator (FDM) and a power determining unit (SE, LBE) for determining the power of the output signal of the high-pass filter (HP). The limit frequency of the high-pass filter (HP) lies in the region of between 20 kHz and 80 kHz, in particular in the region of between 50 kHz and 80 kHz.

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Номер записи: 43
12-09-2013 дата публикации

Method and apparatus for acquiring estimated value of transmitted signal and a system-on-chip

Номер: US20130235917A1
Автор: Jingxin Liang, Yu Dong
Принадлежит: Spreadtrum Communications Shanghai Co Ltd

The embodiments of the disclosure disclose a method and an apparatus for acquiring estimated values of transmitted signals, and a system-on-chip. The method comprises: in response to the sequence number N of a current OFDM symbol between sequence numbers N1 and N2 that are sequence numbers of two adjacent OFDM symbols containing pilots, for each RE within the Nth OFDM symbol, instantaneously acquiring a channel estimation value C N i of the RE by a linear interpolation method; extracting an FFT value of the ith RE from an FFT buffer unit, and based on a preset MIMO demodulation algorithm, performing computation on the C N i and the FFT value of the ith RE, thereby obtaining an estimated value of transmitted signals fro on the ith RE within the Nth OFDM symbol. The embodiments of the disclosure can save SOC memory, reduce SOC chip cost, and enhance SOC information processing performance.

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Номер записи: 44
19-09-2013 дата публикации

BROADCAST RECEIVING APPARATUS AND METHOD FOR REMOVING INTERFERENCE SIGNAL OF ANALOG BROADCAST SIGNAL

Номер: US20130243067A1
Автор: KIM Gyo-nyun, KIM Se-jun, PARK Chan-sub
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A broadcast receiving apparatus and method are provided, the appartus including a signal receiver which receives an analog broadcast signal in a radio frequency (RF) band; a sync signal detector which detects a sync signal area of the received broadcast signal; an interference signal detector which compares the sync signal area of the broadcast signal with a predetermined reference signal and detects an interference signal component; and an interference signal remover which removes the interference signal component from the broadcast signal based on the interference signal component detected from the sync signal area. 1. A broadcast receiving apparatus comprising:a signal receiver which receives an analog broadcast signal in a radio frequency (RF) band;a sync signal detector which detects a sync signal area of the received analog broadcast signal;an interference signal detector which compares the sync signal area of the received analog broadcast signal with a predetermined reference signal and detects an interference signal component; andan interference signal remover which removes the interference signal component from the received analog broadcast signal based on the interference signal component detected from the sync signal area.2. The broadcast receiving apparatus according to claim 1 , wherein the interference signal remover removes the interference signal component from the received analog broadcast signal according to a pattern of the interference signal.3. The broadcast receiving apparatus according to claim 1 , further comprising an analog/digital (A/D) converter which converts the received analog broadcast signal received by the signal receiver claim 1 , into a digital signal and outputs the converted broadcast signal to the sync signal detector.4. The broadcast receiving apparatus according to claim 3 , further comprising a signal demodulator which demodulates the converted broadcast signal output by the A/D converter claim 3 , whereinthe signal ...

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Номер записи: 45
19-09-2013 дата публикации

Method and Device for Noise Floor Estimation

Номер: US20130244603A1
Автор: Wigren Torbjörn
Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

A method () for determining the noise floor in a receiver, comprising sorting () received estimated values of the noise floor by time bins in a time cycle, determining and storing the average value of the received values in each time bin for a previous time cycle and determining () a scale factor for each time bin in the current time cycle, by dividing the average value of each time bin in the previous time cycle by the smallest average value of the time bins in the previous time cycle. The division for time bin k in the previous time cycle is used as scale factor for time bin k in the current time cycle, and the method further comprises determining () applying the scale factor of the current time bin to the currently received estimated value of the noise floor power level. 116-. (canceled)17. A method for determining the noise floor power level in a radio receiver , the method comprising:receiving estimated values of the noise floor power level;sorting the received estimated values by time bins, the time bins being N predetermined portions of a predetermined time cycle;determining the average value of the received values in each time bin for a previous time cycle;determining a scale factor for each time bin k in the current time cycle by dividing an average value of each time bin k in the previous time cycle by a smallest average value of the time bins in the previous time cycle;determining a compensated noise floor power level for each time bin in the current time cycle by applying the scale factor of the current time bin to the currently received estimated value of the noise floor power level.18. The method of further comprising:storing the received estimated values of the noise power floor;determining the average values of the time bins in the previous time cycle based on the stored received estimated values of the noise power floor.19. The method of further comprising:storing the average value of the received values in each time bin for the previous time cycle; ...

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Номер записи: 46
19-09-2013 дата публикации

CONTROL OF MISO NODE

Номер: US20130244605A1
Автор: RAWLINS Gregory S., SORRELLS David F.
Принадлежит: PARKERVISION, INC.

Multiple-Input-Single-Output (MISO) devices and associated VPA control algorithms are provided herein. For example, a method includes receiving a plurality of control signals. The method also generates a plurality of substantially constant envelope signals from the plurality of control signals and a reference signal. The method combines the plurality of substantially constant envelope signals at a multiple input single output (MISO) node to generate a desired waveform. Further, the method controls the desired waveform at the MISO node based on a signal constellation corresponding to the plurality of control signals. 1. A method comprising:receiving a plurality of control signals;generating a plurality of substantially constant envelope signals from the plurality of control signals and a reference signal;combining the plurality of substantially constant envelope signals at a multiple input single output (MISO) node to generate a desired waveform; andcontrolling the desired waveform at the MISO node based on a signal constellation corresponding to the plurality of control signals.2. The method of claim 1 , wherein the receiving comprises receiving the plurality of control signals with an a priori MISO response for a complex plane.3. The method of claim 2 , wherein the receiving the plurality of control signals with the a priori MISO response comprises compensating for non-linearities superimposed on the complex plane.4. The method of claim 1 , wherein the generating comprises generating the plurality of substantially constant envelope signals based on a complex envelope of the desired waveform.5. The method of claim 1 , wherein the combining comprises generating a radio frequency (RF) carrier signal at the MISO node.6. The method of claim 5 , wherein the controlling comprises generating the RF carrier signal based on a carrier frequency claim 5 , a modulation angle claim 5 , an amplitude modulation claim 5 , or a combination thereof.7. The method of claim 1 , wherein ...

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Номер записи: 47
19-09-2013 дата публикации

RECONFIGURABLE RADIO FREQUENCY CIRCUITS AND METHODS OF RECEIVING

Номер: US20130244722A1
Автор: ROUSU Seppo, VALTANEN Juha
Принадлежит: RENESAS MOBILE CORPORATION

A reconfigurable radio frequency circuit is arranged for receiving at least one carrier in a wireless communications terminal arranged to receive at least two carriers, each of the two carriers being transmitted in a different one of a plurality of operating frequency bands, and each of the plurality of operating frequency bands occupying a part of a first or a second frequency range. The circuit includes a combiner for connecting the output of a first receiver filter at a first operating frequency band within the first frequency range to the input of an amplifier and for connecting the output of a second receiver filter at a second operating frequency band within the second frequency range to the input of the amplifier. The amplifier has a selectable operating frequency range, the operating frequency range being selectable at least between the first frequency range and the second frequency range. 1. A reconfigurable radio frequency circuit for receiving at least one carrier in a wireless communications terminal , the wireless communications terminal being arranged to receive at least two carriers , each of the two carriers being transmitted in a different one of a plurality of operating frequency bands , each of the plurality of operating frequency bands occupying a part of a first or a second frequency range , the second frequency range being different from the first frequency range , the circuit comprising:a plurality of receiver filters, including at least a first receiver filter arranged to pass carrier frequencies within a first operating frequency band within the first frequency range, a second receiver filter arranged pass second carrier frequencies within a second operating frequency band within the second frequency range, a third receiver filter arranged to pass carrier frequencies within a third operating frequency band, and a fourth receiver filter arranged to pass carrier frequencies within a fourth operating frequency band;a first combiner for ...

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Номер записи: 48
26-09-2013 дата публикации

DYNAMIC RECEIVER SWITCHING

Номер: US20130251013A1
Автор: Banister Brian Clarke, Srinivasan Shivratna Giri, Yu Yuanning
Принадлежит: QUALCOMM INCORPORATED

Dynamic receiver switching is implemented by a receiving device that selects a first receiver having operating characteristics associated with a first optimal operating region to decode one or more first transmissions. The receiving device then selects a second receiver to decode subsequent transmissions. The second receiver has operating characteristics and an optimal operating region that are different from those of the receiver. 1. A method of wireless communication , comprising:determining a channel quality of a channel associated with one or more data transmissions;selecting a first receiver to decode one or more data transmissions, wherein the first receiver is associated with higher performance at the determined channel quality than a second receiver; andselecting the second receiver to decode one or more data re-transmissions of the one or more data transmissions.2. The method of claim 1 , wherein the first receiver has first operating characteristics associated with a first optimal operating region and the second receiver has second operating characteristics associated with a second optimal operating region claim 1 , wherein the first optimal operating region is different from the second optimal operating region.3. The method of claim 2 , wherein the first optimal operating region comprises one of: a high signal to noise ratio and a low signal to noise ratio; andthe second optimal operating region comprises one of the low signal to noise ratio, when the first optimal operating region is the high signal to noise ratio, and the high signal to noise ratio, when the first optimal operating region is the low signal to noise ratio.4. The method of claim 1 , further comprising:determining an average number of data re-transmissions when the first receiver is selected to decode the one or more data transmissions; andselecting the second receiver to decode the one or more data transmissions in response to the average number of data re-transmissions exceeding a ...

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Номер записи: 49
26-09-2013 дата публикации

Simplified High Frequency Tuner and Tuning Method

Номер: US20130251073A1
Автор: Suominen Edwin A.
Принадлежит: UNIVERSITY OF WASHINGTON

A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the channel spacing or one-half of a channel spacing displaced from an integer multiple of the channel spacing. The local oscillator signal is selected to frequency translate the signal of interest to within a near-baseband passband whose lower edge is spaced from DC by at least about the maximum bandwidth of the signal of interest. Problems associated with 1/f noise, DC offsets, and self-mixing products are avoided or substantially diminished. Other methods and systems are also disclosed. 165-. (canceled)66. A method for dynamically selecting high-side or low-side injection of local oscillator mixing signals to help reject images within a receiver , comprising:(a) providing a mixer configured to utilize a mixing signal to mix an input signal to a desired frequency;(b) receiving an RF signal spectrum including a plurality of channels;(c) identifying a channel within the RF signal spectrum to be tuned;(d) selecting high-side injection or low-side injection for the mixing signal;(e) generating a high-side local oscillation (LO) signal if high-side injection is selected, and generating a low-side local oscillation (LO) signal if low-side injection is selected;(f) and mixing the RF signal spectrum with the local oscillation signal that was selected and generated so as to mix the channel to be tuned down to the desired frequency;(g) low-IF conversion circuitry coupled to receive the low-IF signals from the mixer and configured to output digital signals, the low-IF conversion circuitry including first and second analog-to-digital converters coupled to the real and imaginary low-IF signals and configured to output real and imaginary digital signals; and,(h) a digital-signal-processor (DSP) coupled to receive the digital ...

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Номер записи: 50
03-10-2013 дата публикации

RECEIVER CIRCUIT FOR RECEIVING AN INPUT SIGNAL

Номер: US20130257308A1
Автор: GREIMEL-RECHLING Bernhard
Принадлежит: ams AG

A receiver circuit for receiving an input signal (I, U) comprises a detector circuit (), which is in the form of a sample-and-hold circuit for determining a reference level of the input signal or in the form of a filter circuit for generating a mean value of levels of the input signal (I, U). The detector circuit generates, on the output side, a referential signal (RS), which is supplied to comparator circuits (). The comparator circuits (, 113) compare an offset level of the input signal (I, U) with the referential signal (RS) and generate data signals (DATA, DH, DL). The offset input signals (I, U) are evaluated relatively in respect of the reference level or the mean value of the levels of the input signal. 1. A receiver circuit for receiving an input signal , comprising:an input connection for applying the input signal;a detector circuit for generating a referential signal,wherein the detector circuit is connected to the input connection, andwherein the detector circuit is designed to detect a level of the input signal and to generate the referential signal depending on the detected level;an offset circuit for generating a comparison signal,wherein the offset circuit is connected to the input connection, andwherein the offset circuit is designed to add an offset level to the level of the input signal and to generate the level of the comparison signal depending on the addition; anda comparator circuit for generating a level of a data signal,wherein the comparator circuit is connected to the offset circuit and the detector circuit, andwherein the comparator circuit is designed to generate the level of the data signal depending on a comparison of the level of the referential signal with the level of the comparison signal.2. The receiver circuit according to claim 1 , wherein an input voltage can be supplied as input signal to the detector circuit claim 1 ,wherein the detector circuit is in the form of a sample-and-hold circuit, which, after sampling of the input ...

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Номер записи: 51
03-10-2013 дата публикации

METHOD AND APPARATUS FOR DETECTING ENVELOPE USING DIFFERENCE BETWEEN SAMPLING SIGNALS

Номер: US20130259167A1
Автор: Kim Sang Joon, Kwon Ui Kun, YOON Seung Keun
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A method and an apparatus for detecting an envelope using a difference between sampling signals are provided. The method includes generating sampling sets based on sampling signals of a modulated signal, and determining a sampling set from the sampling sets. The method further includes determining an envelope component value associated with a sampling signal among sampling signals included in the determined sampling set, based on a difference between the sampling signals included in the determined sampling set, and a difference between sampling signals included in each of the sampling sets other than the determined sampling set. The method further includes detecting an envelope of the modulated signal based on the envelope component value. 1. A method of detecting an envelope , the method comprising:generating sampling sets based on sampling signals of a modulated signal;determining a sampling set from the sampling sets;determining an envelope component value associated with a sampling signal among sampling signals included in the determined sampling set, based on a difference between the sampling signals included in the determined sampling set, and a difference between sampling signals included in each of the sampling sets other than the determined sampling set; anddetecting an envelope of the modulated signal based on the envelope component value.2. The method of claim 1 , further comprising:determining the sampling signals to comprise at least four consecutive sampling signals from a plurality of sampling signals of the modulated signal.3. The method of claim 2 , wherein the sampling sets comprise three sampling sets claim 2 , each of the three sampling sets comprising a respective pair of the at least four consecutive sampling signals.4. The method of claim 1 , wherein the sampling signals are sampled at equal time intervals.5. The method of claim 1 , further comprising:performing multiplication on the difference between the sampling signals included in the ...

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Номер записи: 52
10-10-2013 дата публикации

Low-Power Receiver

Номер: US20130267183A1
Автор: DARABI HOOMAN, Kahrizi Masoud, Mikhemar Mohyee
Принадлежит:

According to one embodiment, a compact low-power receiver comprises a front-end producing a front-end gain and a back-end producing a back-end gain. The front-end includes a transconductance amplifier providing digital gain control and outputting an amplified receive signal, a mixer for generating a down-converted signal from the amplified receive signal, and a transimpedance amplifier (TIA) including a current mode buffer. The TIA provides gain control for amplifying the down-converted signal to produce a front-end output signal. In one embodiment, the back end includes a second-order low-pass filter to produce a filtered signal from the front-end output signal and an analog-to-digital converter (ADC), wherein the filtered signal is fed directly to the ADC without direct-current (DC) offset cancellation being performed. In various embodiments, the front-end gain is substantially greater than the back-end gain. 120-. (canceled)21. A receiver comprising: a transconductance amplifier providing gain control and outputting an amplified receive signal;', 'a mixer for generating a down-converted signal from said amplified receive signal;', 'a transimpedance amplifier (TIA), said TIA providing gain control for amplifying said down-converted signal to produce a front-end output signal;, 'a front-end producing a front-end gain, said front-end comprisinga back-end producing a back-end gain;wherein said front-end gain is substantially greater than said hack-end gain.22. The receiver of claim 21 , wherein said front-end gain is at least twice as great as said back-end gain.23. The receiver of claim 21 , wherein said hack-end is configured to filter said front-end output signal using a second-order low-pass filter to produce a filtered signal.24. The receiver of claim 23 , wherein said filtered signal is fed to an analog-to-digital converter (ADC) of said back-end without DC offset cancellation.25. The receiver of claim 21 , wherein said back-end comprises an ADC having a ...

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Номер записи: 53
17-10-2013 дата публикации

RECEIVING AND PROCESSING DEVICE, RECEIVING AND PROCESSING METHOD, AND RECEIVING AND PROCESSING PROGRAM

Номер: US20130271311A1
Автор: IZUMI Itaru, KAMBE Takeshi
Принадлежит:

A receiving and processing device includes an antenna extension unit configured to perform a process of additionally arranging data pieces of two or more continuous receiving antennas in a receiving antenna array in which the plurality of receiving antennas are arranged at regular intervals, a process of inverting phases of data pieces of the additionally-arranged two or more receiving antennas, a process of rearranging the data pieces of the phase-inverted two or more receiving antennas so as to invert the arrangement of the data pieces, a process of rotating the phases of the data pieces of the rearranged two or more receiving antennas, and a process of connecting the data pieces of the phase-rotated two or more receiving antennas to the data pieces of the plurality of receiving antennas. 1. A receiving and processing device processing data pieces of a plurality of receiving antennas acquired based on signals received by the receiving antennas constituting a receiving antenna array in which the plurality of receiving antennas are arranged at regular intervals , the device comprising an antenna extension unit configured to perform:a process of arranging the data pieces of two or more continuous receiving antennas of the plurality of receiving antennas so as to be added to the data pieces of the plurality of receiving antennas in such a manner that a position of the receiving antenna at one end of the two or more receiving antennas is located at a position of the receiving antenna at the opposite end of the plurality of receiving antennas;a process of inverting phases of data pieces of the additionally-arranged two or more receiving antennas;a process of rearranging the data pieces of the phase-inverted two or more receiving antennas so as to invert the arrangement of the data pieces;a process of rotating the phases of the data pieces of the rearranged two or more receiving antennas so that the phases of two data pieces at the position of the receiving antenna at ...

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Номер записи: 54
17-10-2013 дата публикации

SYSTEMS AND METHODS FOR CLOCK COMPENSATION

Номер: US20130272455A1
Автор: HOMCHAUDHURI Sandip, Raissinia Alireza
Принадлежит: QUALCOMM INCORPORATED

In a wireless communication system including a transmitter device and a receiver device, the receiver device may be configured to awake from a low power mode to receive beacons from the transmitter device. The receiver device may awaken an early reception interval prior to the beacon arrival time determined by the local clocks to account for inaccuracies in the local clocks and the transmitter clock. The early reception interval may be dynamically adjusted based upon an estimation of the clock errors to minimize the early reception interval. 1. A method for wireless communication by a receiver device , wherein the receiver device knows a specified time interval at which a transmitter device is to periodically send a beacon , comprising:operating the receiver device in a low power mode for at least a portion of the specified time interval;determining at the receiver device a first activation offset corresponding to a clock inaccuracy at the receiver device with respect to the transmitter device;determining at the receiver device an early reception interval based on the first activation offset; andactivating the receiver device a duration of time corresponding to the early reception interval prior to a scheduled beacon transmission from the transmitter device.2. The method of claim 1 , wherein determining the first activation offset comprises calculating a frequency-derived offset.3. The method of claim 1 , wherein determining the first activation offset comprises calculating a time correlation-derived offset.4. The method of claim 2 , wherein determining the first activation offset further comprises calculating a time correlation-derived offset.5. The method of claim 1 , wherein the clock inaccuracy comprises errors between a transmitter clock used to modulate a digital signal into symbols with respect to a first receiver clock used to demodulate the symbols.6. The method of claim 5 , further comprising:tracking using a second clock time spent operating the receiver ...

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Номер записи: 55
17-10-2013 дата публикации

Receiving Device And Method Thereof

Номер: US20130273865A1
Автор: CHEN Yi-Cheng, LAI Chia-Ta, LO Jen-Chieh
Принадлежит:

A wireless signal receiving system, having an antenna, for receiving a wireless signal comprising a channel. The system also includes a tuner, coupling to the antenna, for converting the frequency of the wireless signal to generate a conversion signal. In addition, the system includes a processing unit, coupling to the tuner, for controlling the signal receiving direction of the antenna to detect the wireless signals of a first direction and a second direction, using the tuner to generate a first conversion signal and a second conversion signal so as to obtain a first reference value and a second reference value, and generating a control signal according to the first reference value and the second reference value to control the selected receiving direction of the antenna while the antenna is to receive the wireless signal of the channel. 1. A wireless signal receiving system , comprising:an antenna, for receiving a wireless signal comprising a channel;a tuner, coupling to the antenna, for converting the frequency of the wireless signal to generate a conversion signal; anda processing unit, coupling to the tuner, for controlling the signal receiving direction of the antenna to detect the wireless signals of a first direction and a second direction, using the tuner to generate a first conversion signal and a second conversion signal so as to obtain a first reference value and a second reference value, and generating a control signal according to the first reference value and the second reference value to control the selected receiving direction of the antenna while the antenna is to receive the wireless signal of the channel.2. The system according to claim 1 , wherein the reference value is selected from the group consisting of the following: signal-to-noise ratio claim 1 , packet error rate and bit error rate.3. The system according to claim 1 , wherein the processing unit outputs the control signal to the antenna via an interface.4. An antenna processing system ...

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Номер записи: 56
24-10-2013 дата публикации

Reconfigurable Wide-Band Receiver with Positive Feed-Back Translational Loop

Номер: US20130281039A1
Автор: Cathelin Philippe, Izquierdo Christian, Kaiser Andreas, Montaudon Franck
Принадлежит: ST-Ericsson SA

The invention relates to a device comprising a direct path block with an input and an output, and a feedback block with an input and an output, the input of the direct path block being adapted to receive a multi-channel input signal with a given frequency range and the output of the direct path block being adapted to output an output signal with a base band frequency range, the output of the direct path block being coupled to the input of the feedback block and the input of the direct path block being coupled to the output of the feedback block. The direct path block comprises a first transposing unit () adapted to transpose the input signal to the base band frequency range and the feedback block comprises a filtering unit () adapted to filter the transposed signal at the output of the direct path block, a second transposing unit () adapted to transpose the filtered signal to the given frequency range and to feed back the transposed signal at the input of the direct path block. The first transposing unit and the second transposing unit are reconfigurable in function of the given frequency range of the input signal. 112-. (canceled)13. A device comprising:a direct path block with an input and an output; anda feedback block with an input and an output;wherein the input of the direct path block is configured to receive a multi-channel input signal having a given frequency range;wherein the output of the direct path block is configured to output an output signal having a baseband frequency range;wherein the output of the direct path block is coupled to the input of the feedback block and the input of the direct path block is coupled to the output of the feedback block;wherein the direct path block comprises a first transposing unit configured to transpose the input signal to the baseband frequency range; a filtering unit configured to filter the transposed signal at the output of the direct path block; and', 'a second transposing unit configured to transpose the ...

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Номер записи: 57
31-10-2013 дата публикации

HIGH-INTEGRITY DATA TRANSMISSION SYSTEM

Номер: US20130287143A1
Автор: Davies Robin William
Принадлежит: BAE SYSTEMS plc

A method of high-integrity data transmission including transmitting nominally-identical data via first and second channels, inverting the logic of the data in the second channel receiving the data via a respective data handling device for each channel, inverting the logic of data outputted by one of the data-handling devices and comparing the so-inverted data with data outputted by the other data handling device. The invention is relevant to the avoidance of common-mode failures in aircraft, other vehicles and plant employing high-integrity data systems. 1. A data receiver for use with a data-transmission system having a first channel and a second channel for transmitting nominally-identical data , the receiver comprising:inputs for receiving separately data from first and second channels;means for inverting logic of data received from the second channel;respective data-handling devices for receiving and outputting separately data from the first channel and data from the second channel; andprocessor means configured to invert the logic of data outputted by the data-handling device of one of the channels and to compare the inverted data with the data outputted by the data-handling device of the other channel.2. The data receiver of wherein the inverting means is an inverting buffer amplifier.3. The data receiver of claim 1 , in combination with a data transmission system comprising a first channel and a second channel for transmitting nominally-identical data.4. A data receiver for use with a data-transmission system having a first channel and a second channel for transmitting nominally-identical data claim 1 , data in the second channel being logically inverted relative to data in the first channel claim 1 , the receiver comprising:respective data-handling devices for receiving and outputting separately data from first and second channels; andprocessor means configured to invert logic of data outputted by the data-handling device of one of the channels and to ...

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Номер записи: 58
31-10-2013 дата публикации

RECEIVER DEVICE, SYSTEM, AND METHOD FOR LOW-ENERGY RECEPTION OF DATA

Номер: US20130287146A1
Автор: Schmidt Frank
Принадлежит:

A receiver device, A system and a method for reception of a signal having an amplitude that has been modulated with information, wherein a resistive element is provided that converts an electrical quantity into a physical parameter. 1. A receiver device comprising:an antenna configured to provide, at an output thereof, an electrical quantity modulated in amplitude with information;a resistive element coupled to receive the antenna output; andan evaluation unit connected after the resistive element, wherein the evaluation unit is configured to:evaluate a modification of at least one physical parameter of the resistive element, in comparison to a load with an unmodulated electrical quantity,a signal related to the physical parameter varies due to the amplitude modulation of the electrical quantity, andthe information is provided at an output of the evaluation unit.2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (canceled)14. (canceled)15. (canceled)16. (canceled)17. (canceled)18. (canceled)19. (canceled)20. (canceled)21. (canceled)22. (canceled)23. (canceled)24. (canceled)25. (canceled)26. (canceled)27. (canceled)28. (canceled)29. (canceled) This application claims priority of German Application No. 10 2008 314 06.4 filed Jul. 2, 2008, the content of which is hereby incorporated by reference.The invention relates to a receiver device, a system, and a method for the reception of a signal having an amplitude that has been modulated with information.Due to existing standards, transmission devices of wirelessly operated systems may not exceed a defined transmission power. A typical maximum transmission power is, for example, 10 mW. This corresponds to a maximum transmission level of 10 dBm. Due to this limitation of the transmission power, the range for successful transmission of information is very greatly dependent on the configuration of The receiver device. A problem ...

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Номер записи: 59
31-10-2013 дата публикации

RECEIVER SYSTEM COMPRISING A MAIN RECEIVER AND AU AUXILIARY RECEIVER FOR CORRECTING IMPERFECTIONS IN THE MAIN RECEIVER

Номер: US20130288623A1
Автор: BJÖRK Vimar, HAGEN Derek, Rolen Claes, Widhe Torbjorn Gunnar
Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

A receiver circuit comprising first and second receivers for demodulating first and second parts, respectively, of a received signal. The receiver circuit also comprises an adjustment circuit for adjusting the demodulated signal from the first receiver. The output signal from the adjustment circuit is used as output signal from the receiver circuit which also comprises an adjustment value circuit for determining an adjustment value for the adjustment circuit in adjusting the output signal from the first receiver. The adjustment value circuit receives the demodulated signal from the second receiver and the output signal from the adjustment circuit and uses differences between these input signals for forming said adjustment value. The first receiver and the second receiver have different transfer functions within one and the same frequency range. 1. A receiver circuit comprising a first and a second receiver which are arranged to receive and demodulate a first and a second part , respectively , of a received signal , the receiver circuit also comprising an adjustment circuit for adjusting the demodulated output signal from the first receiver , the output signal from the adjustment circuit being used as an output signal from the receiver circuit , the receiver circuit also comprising an adjustment value circuit for determining an adjustment value (Δ) for use by the adjustment circuit in adjusting the output signal from the first receiver , the adjustment value circuit being arranged to receive as input signals the demodulated signal from the second receiver and the output signal from the adjustment circuit , and to use differences between these input signals for forming said adjustment value (Δ) , wherein the first receiver and the second receiver have different transfer functions within one and the same frequency range.2. The receiver circuit of claim 1 , in which the first and second receivers have different transfer functions within one and the same frequency range ...

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Номер записи: 60
31-10-2013 дата публикации

Radio Receiver with Adaptive Tuner

Номер: US20130288625A1
Автор: Bakhri Syaiful, Chia Wei Ming Dan, Fernandes Brian Sunil Nicholas, Lee Mintak, Tang Yinn Sinn, YUAN Ye
Принадлежит:

A mobile radio receiver for a vehicle. The mobile radio receiver includes a tuner front-end section, a location data port, a sensor port, and a data processing unit. The location data port is used for receiving tuner location data. The sensor port is used for receiving one or more sensor signals. The data processing unit is operably connected with the tuner front-end section, with the location data port, and with the sensor port. The data processing unit further comprises predetermined tuner location data and predetermined relationship data sets for determining a set of tuner front-end section parameters based on the sensor signals. The mobile radio receiver provides an operational mode, a checking mode, a tuner parameter adjustment mode, and a tuner parameter application mode. 118.-. (canceled)19. A mobile radio receiver for a vehicle comprising:a tuner front-end section;a location data port configured to receive tuner location data;a sensor port configured to receive at least one sensor signal; anda data processing unit operably connected to:the tuner front-end section,the location data port, andthe sensor port,the data processing unit further comprising:at least two predetermined tuner location data and at least two pre-determined relationship data sets for determining a set of tuner front-end section parameters based on the at least one sensor signal,wherein the mobile radio receiver provides an operational mode, a checking mode, a tuner parameter adjustment mode, and a tuner parameter application mode,in the operational mode, the tuner front-end section operates according to at least one set of tuner front-end section parameters,in the checking mode, the data processing unit checks the at least one sensor signal against at least one predetermined threshold, such that the mobile radio receiver enters the parameter adjustment mode when the at least one sensor signal exceeds the at least one predetermined threshold,in the tuner parameter adjustment mode, the data ...

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Номер записи: 61
31-10-2013 дата публикации

Method And Apparatus For Controlling A Harmonic Rejection Mixer

Номер: US20130288627A1
Автор: Piovaccari Alessandro, Rafi Aslamali A.
Принадлежит:

In one embodiment, the present invention includes a method for receiving a radio frequency (RF) signal and mixing the RF signal with a master clock to obtain a mixed signal, cyclically rotating the mixed signal to each of N gain stages for at least one cycle of the master clock, and summing the outputs of the N gain stages to provide an output signal. 1. An apparatus comprising:a master radio frequency (RF) device to receive an incoming RF signal and provide an RF output, the master RF device modifying the incoming RF signal;a master local oscillator (LO) device coupled to an output of the master RF device, the master LO device to receive the RF output and mix the RF output with a master clock signal to obtain a mixed signal;a rotating switch device coupled to the master LO device to cyclically switch the mixed signal to one of a plurality of output ports of the rotating switch device;circuitry coupled to each of the plurality of output ports for performing gaining, filtering and weighting of the mixed signal and providing a plurality of outputs; anda summer coupled to the plurality of outputs of the circuitry to generate a summer output.2. The apparatus of claim 1 , wherein the master LO device comprises a plurality of metal oxide semiconductor field effect transistors (MOSFETs) each having a first terminal to receive the RF output from the master RF device claim 1 , a gate terminal to receive the master clock signal claim 1 , and a second terminal to output the mixed signal.3. The apparatus of claim 2 , wherein the rotating switch device comprises a plurality of rotating switches each comprising a transistor to receive the mixed signal from the second terminal of the corresponding MOSFET and to output the mixed signal when the transistor is enabled by a control signal claim 2 , wherein a value of the control signal is changed when a value of the master clock signal is at a low state.4. The apparatus of claim 1 , wherein the incoming RF signal is from an antenna ...

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Номер записи: 62
31-10-2013 дата публикации

ADJUSTABLE ANTENNA ASSEMBLY FOR RECEIVE BLOCKING

Номер: US20130288628A1
Автор: ROFOUGARAN AHMADREZA (REZA), Rofougaran Maryam
Принадлежит: BROADCOM CORPORATION

An RF receiver section includes an adjustable antenna assembly, a low noise amplifier module, and a down conversion module. The adjustable antenna assembly is configured to provide a first receive antenna structure and a second receive antenna structure. The first and second receive antenna structures receive an inbound wide bandwidth RF signal that includes an interferer RF signal component and a desired inbound RF signal component. The effective polarization of at least one of the first and second receive antenna structures is adjusted to reduce signal strength of the interferer RF signal component. 120-. (canceled)21. A radio frequency (RF) receiver section comprising: in a first configuration, determine a first signal strength of the inbound wide bandwidth RF signal and a first signal strength of the desired inbound RF signal component;', 'in another configuration, determine another signal strength of the inbound wide bandwidth RF signal and another signal strength of the desired inbound RF signal component;', 'determine a polarization offset based on the first and the another signal strength; and', 'adjust an effecitve polarization offset based on the polarization offset by changing at least one characteristic of a plurality of characteristics of the first and second receive antenna structures to reduce signal strength of the interferer RF signal component., 'an adjustable antenna assembly includes a first receive antenna structure and a second receive antenna structure configured to receive an inbound wide bandwidth RF signal that includes an interferer RF signal component with one or more outbound RF signals and a desired inbound RF signal component, the adjustable antenna assembly functions to22. The RF receiver section of claim 21 , wherein each of the first and second receive antenna structures comprising:one or more antenna interface modules; andone or more antennas coupled to the one or more antenna interfaces, wherein the at least one characteristic of ...

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Номер записи: 63
07-11-2013 дата публикации

RADIO FREQUENCY SWITCH FOR DIVERSITY RECEIVER

Номер: US20130295866A1
Автор: Kim Jonghae, Lo Chi Shun, Velez Mario F., Yun Changhan, Zuo Chengjie
Принадлежит: QUALCOMM INCORPORATED

A diversity receiver switch includes at least one second stage switch configured to communicate with a transceiver. The diversity receiver switch may also include at least one first stage switch coupled between a diversity receiver antenna and the second stage switch(es). The first stage switch(es) may be configured to handle a different amount of power than the second stage switch(es). The diversity receiver switch may include a bank of second stage switches configured to communicate with a transceiver. A first stage switch may be configured to handle more power than each switch in the bank of second stage switches. Alternatively, the diversity receiver switch include a bank of first stage switches coupled between the diversity receiver antenna and a second stage switch. The second stage switch may be configured to handle more power than each of the first stage switches.

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Номер записи: 64
14-11-2013 дата публикации

RECEIVER CONFIGURABLE IN A PLURALITY OF MODES

Номер: US20130303099A1
Автор: Kaczman Daniel L., Shah Manish N.
Принадлежит: Freescale Semiconductor, Inc.

Methods and corresponding systems for receiving a radio frequency signal include a receiver capable of switching operating modes and operable to receive the radio frequency signal in any of the operating modes. A metric monitor is coupled to the receiver and operable to provide a metric. A controller is responsive to the metric and operable to switch the receiver between the operating modes. The operating modes can include a zero intermediate frequency (ZIF) mode and a very low intermediate frequency (VLIF) mode. The metric can include a received signal strength indicator (RSSI) and an adjacent channel indicator. The receiver can be configured to operate in the ZIF mode in response to the RSSI value satisfying a threshold and configured to operate in the VLIF mode in response to the RSSI value failing to satisfy the threshold. 1. A receiver for receiving a selected signal in a communication system , the receiver operable using a plurality of modes , the receiver comprising:a first mixer for performing a first mixer function, wherein the first mixer has a signal input, a first local oscillator input, and a first mixer output;a first local oscillator having a first local oscillator output coupled to the first local oscillator input of the first mixer, and having a first control input for setting a first local oscillator frequency;a second mixer for performing a second mixer function, wherein the second mixer has a second mixer input coupled to the first mixer output, a second local oscillator input, and a second mixer output for outputting a baseband signal;a second local oscillator having a second local oscillator output coupled to the second local oscillator input of the second mixer;a metric monitor for monitoring a metric of the receiver the metric corresponding to the selected signal;a second mixer bypass for bypassing the second mixer; anda controller for selecting one of the plurality of modes in response to the metric, wherein the controller is coupled to the ...

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Номер записи: 65
21-11-2013 дата публикации

Method for Sensing Wireless Microphones Using Augmented Spectral Correlation Function

Номер: US20130308730A1
Автор: Sun Huanhuan, Zhang Taitai, Zhang Wenyi
Принадлежит: UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA

A method for detecting wireless microphone signals based on an augmented spectral correlation function is provided. The method includes obtaining an augmented spectral correlation function (SCF) of acquired digital signals based on a SCF of the digital signal and a conjugate SCF proposed in the present invention, calculating a statistic, and comparing it with a decision threshold simulated or calculated through a predetermined method to determine whether the digital signal is a wireless microphone signal. With the proposed augmented SCF, the present invention overcomes a difficulty in sensing TV white space, namely, the inability of most existing detection methods to effectively distinguish between narrowband interferences and wireless microphone signals. Meanwhile, the detection method has low algorithm complexity and is easy to implement in real systems 1. A method for detecting a wireless microphone signal based on an augmented spectral correlation function (SCF) , characterized in that the method comprises:{'sub': x', 'x', 'c', 'x', 'a, 'sup': α', 'α', 'α, 'acquiring a preprocessed time-domain digital signal x[n], calculating a SCF Ŝ(ƒ) of the digital signal x[n], calculating a conjugate SCF Ŝ(ƒ)of the digital signal x[n] , and calculating the augmented SCF Ŝ(ƒ)of the digital signal x[n]; and'}{'sub': p', 'p, 'calculating a statistic Tof the digital signal x[n], simulating or calculating a threshold γ with a predetermined method, and determining whether the acquired digital signal x[n] is a wireless microphone signal based on result of comparison between the statistic Tand the threshold γ.'}2. The method of claim 1 , characterized by the calculation of the SCF of the digital signal.3. The method of claim 1 , characterized by the calculation of the conjugate SCF of the digital signal.4. The method of claim 1 , characterized by the calculation of the augmented SCF of the digital signal.5. The method of claim 1 , characterized by the calculation of the statistic of ...

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Номер записи: 66
21-11-2013 дата публикации

REMOTE INTERFERENCE CANCELLATION FOR COMMUNICATIONS SYSTEMS

Номер: US20130308732A1
Автор: Deng Yanhua, Dourbal Paul, Holland Robert, Kpodzo Elias Bonaventure, McCandless Andrew, Prucnal Paul
Принадлежит:

An interference cancellation system (ICS) may be used with a communication system to prevent or minimize interference from one or more sources. The ICS may receive radio frequency (RF) signals comprised of one or more signals of interest (SOI) and multiple interfering signals. An interference estimation processor (IEP) may be used to estimate the one or more interfering signals. The interfering signals may be estimated using spatial and/or time diversity, which may be combined with statistical methods. The estimated interfering signals may be sent to the ICS, which may use the estimated interference signal to cancel the interference and output the SOI. 1. A system for cancelling interference , the system comprising:an interference estimation processor configured to estimate an interference signal received from a remote and unknown location; and receive the estimated interference signal and a combined signal that includes a combination of the interference signal and a signal of interest (SOI),', 'variably attenuate and variably time delay one or more of the interference signal or the combined signal,', 'convert the estimated interference signal and the combined signal to optical signals, and', 'cancel at least one portion of the interference signal from the combined signal based on the estimated interference signal., 'an interference cancellation processor configured to2. The system of claim 1 , wherein the interference estimation processor is further configured to estimate the interference signal using at least one of spatial or time diversity.3. The system of claim 1 , wherein the interference cancellation processor is further configured to:determine whether the cancellation of the at least one portion of the interference signal meets a threshold, andwhen the cancellation does not meet the threshold, cancel at least one other portion of the interference signal based on another estimated interference signal received from the interference estimation processor.4. The ...

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Номер записи: 67
21-11-2013 дата публикации

RADIO-FREQUENCY FRONT-END SUPPORTING MULTIPLE WIRELESS COMMUNICATION STANDARDS

Номер: US20130309979A1
Автор: Hsu Jui-Lin, Lee Chih-Hung, Li Yi-An, Shen Chih-Hsien, Wu Chia-Hsin
Принадлежит: MEDIATEK INC.

A radio-frequency (RF) front-end supporting at least a first and second wireless communication bands includes a mixer arranged for mixing a received signal with a first local oscillation signal when the shared receiver front-end performs the reception operation according to the first wireless communication band, and for mixing the received signal with a second local oscillation signal when the shared receiver front-end performs the reception operation according to the second wireless communication band, wherein the first and second local oscillation signals are different in frequency. 1. A radio-frequency (RF) front-end supporting at least a first and second wireless communication bands , comprising: 'a mixer, for mixing a received signal with a first local oscillation signal when the shared receiver front-end performs the reception operation via the first wireless communication band, and mixing the received signal with a second local oscillation signal when the shared receiver front-end performs the reception operation via the second wireless communication band, wherein the first and second local oscillation signals are different in frequency.', 'a shared receiver front-end comprising2. The RF front-end of claim 1 , wherein the first and second wireless communication bands are included in specified spectrums defined by at least one of a first and second wireless communication standards.3. The RF front-end of claim 2 , wherein the RF front-end is operative for a time division duplexing (TDD) scheme.4. The RF front-end of claim 3 , further comprising:a first transmitter front-end arranged for performing a transmission operation according to the first wireless communication standard; anda second transmitter front-end arranged for performing a transmission operation according to the second wireless communication standard;wherein during each time slot of the TDD scheme, only one of the first transmitter front-end, the second transmitter front-end and the shared receiver ...

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Номер записи: 68
21-11-2013 дата публикации

APPARATUS AND METHODS FOR ADJUSTING ADAPTIVE CONTROL LOOP BEHAVIOR BASED ON MEASURED ARTIFACTS

Номер: US20130309988A1
Автор: Damji Navid, Ji Zhu, Sebeni Johnson O.
Принадлежит: Apple Inc.

Methods and apparatus for adjusting adaptive control loop behavior based on, for example measured artifacts of the radio environment. In one embodiment, a Long Term Evolution (LTE) user equipment (UE) adjusts one or more Automatic Gain Control (AGC) loops based on a measured Doppler spread of received signals. Specifically, one or more AGC parameters (e.g., set-point, loop gain, etc.) are selected based on a measured Doppler spread. The one or more AGC parameters are configured to optimize both the AGC headroom (e.g., dynamic range) and the signal to quantization plus noise ratio (SQNR) of the receiver under dynamic wireless fading channels for the detected Doppler. 1. Wireless mobile apparatus , comprising:a wireless interface configured with an adaptive control loop;a processor in data communication with the wireless interface; andlogic in data communication with the processor and configured to cause the wireless mobile apparatus to select one or more automatic gain control (AGC) parameters associated with the adaptive control loop based on one or more detected Doppler-related artifacts of a radio environment in which the mobile apparatus operates, the one or more AGC parameters configured to optimize both (i) AGC dynamic range, and (ii) signal-to-quantization-plus-noise ratio (SQNR) of the wireless interface under dynamic wireless fading conditions.2. The apparatus of claim 1 , wherein the interface comprises a long term evolution (LTE) enables wireless interface claim 1 , and one or more AGC parameters comprise at least one of set-point and loop again.3. The apparatus of claim 1 , wherein the one or more detected Doppler-related artifacts comprises a Doppler spread.4. The apparatus of claim 1 , wherein the logic is further configured to cause the wireless mobile apparatus to perform the selection of the one or more AGC parameters in a dynamic fashion based on changes in the radio environment.5. The apparatus of claim 4 , wherein the adaptive control loop ...

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Номер записи: 69
21-11-2013 дата публикации

METHOD OF ADJUSTING THE RECEIVE FREQUENCY OF AN RF RECEIVER DIE

Номер: US20130309990A1
Автор: HASHIM Mohamad Faizal, SALLEH Syahrizal, YUSSOF Zulkalnain Mohd
Принадлежит: Telekom Malaysia Berhad

Disclosed is a method of adjusting the receive frequency of a radio frequency (RF) receiver die (), the RF receiver die () comprising a mixer ( with an associated local oscillator () and a first low-noise amplifier () arranged to operate over a first frequency range, the method comprising affixing a second low-noise amplifier () arranged to operate over a second frequency range to the RF receiver die (). 1. A method of adjusting the receive frequency of an RF receiver die , the RF receiver die comprising a mixer with an associated local oscillator and a first low-noise amplifier arranged to operate over a first frequency range , the method comprising:affixing a second low-noise amplifier arranged to operate over a second frequency range to the RF receiver die.2. The method of comprising the step of connecting the output of the second low-noise amplifier to the input of the mixer.3. The method of comprising the step of adjusting the frequency of the local oscillator.4. The method of where the second low-noise amplifier is affixed to the RF receiver die with an electrically conductive adhesive.5. The method of where the second low-noise amplifier is affixed to the RF receiver die with solder.6. The method of where the second low noise amplifier is electrically connected to a base circuit board ground plane.7. The method of where the second low-noise amplifier is affixed to the first low-noise amplifier.8. The method of where the second low-noise amplifier is affixed to the top of the first low-noise amplifier.9. The method of where the overall length and width of the RF receiver die remains unchanged.10. The method of where the RF receiver die is one of a homodyne zero-IF receiver claim 1 , a homodyne non-zero-IF receiver claim 1 , a heterodyne receiver claim 1 , a wideband-IF receiver claim 1 , or a low-IF receiver.11. The method of where the mixer is either a passive mixer or a wideband resonance active mixer.12. An RF receiver apparatus comprising:an RF receiver ...

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Номер записи: 70
28-11-2013 дата публикации

DEMODULATION CIRCUIT AND RFID TAG INCLUDING THE DEMODULATION CIRCUIT

Номер: US20130314152A1
Автор: Matsuzaki Takanori, Shionoiri Yutaka
Принадлежит: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

An object is to provide a demodulation circuit having a sufficient demodulation ability. Another object is to provide an RFID tag which uses a demodulation circuit having a sufficient demodulation ability. A material which enables a reverse current to be small enough, for example, an oxide semiconductor material, which is a wide bandgap semiconductor, is used in part of a transistor included in a demodulation circuit. By using the semiconductor material which enables a reverse current of a transistor to be small enough, a sufficient demodulation ability can be secured even when an electromagnetic wave having a high amplitude is received. 1. (canceled)2. A semiconductor device comprising:an antenna;a first transistor comprising a channel formation region including an oxide semiconductor;a second transistor comprising a channel formation region including an oxide semiconductor; anda first capacitor,wherein the antenna is electrically connected to one terminal of the first capacitor,wherein the other terminal of the first capacitor, a gate of the first transistor, one of a source and drain of the first transistor, and one of a source and a drain of the second transistor are electrically connected to one another, andwherein a gate of the second transistor is electrically connected to the other of the source and the drain of the second transistor.3. The semiconductor device according to claim 2 , further comprising:a second capacitor,wherein one terminal of the second capacitor is electrically connected to the other of the source and the drain of the first transistor, andwherein the other terminal of the second capacitor is electrically connected to the other of the source and the drain of the second transistor.4. The semiconductor device according to claim 2 , further comprising:a resistor,wherein one terminal of the resistor is electrically connected to the other of the source and the drain of the first transistor, andwherein the other terminal of the resistor is ...

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Номер записи: 71
28-11-2013 дата публикации

MICROWAVE BAND BOOSTER RECTIFIER CIRCUIT, AND WIRELESS TAG DEVICE AND WIRELESS TAG SYSTEM EMPLOYING SAME

Номер: US20130314216A1
Автор: Kitayoshi Hitoshi, Sawaya Kunio
Принадлежит:

In order to implement novel utilization methods, implementation of a low power consumption and high sensitivity RF receiving system is desired. A microwave frequency band stub resonance booster circuit characterized by boosting the amplitude of an RF signal in a passive operation by resonating in series a 0.2 pF to 0.01 pF micro-capacitor element with a λg/2 open stub element to perform impedance conversion of the input RF signal is used. In addition, since a capacitor which has been conventionally inserted in order to repeat charging and discharging of the RF signal by using two diodes becomes useless by putting a DC resonant component of resonant-boosted output into an open state when voltage-doubling and rectifying the resonant-boosted RF signal, rectified output can be obtained and high-sensitivity reception and detection of the RF signal becomes possible without being affected by the capacitor which imparts comparatively large insertion loss. 19-. (canceled)10. A microwave frequency band stub resonance booster circuit , characterized in that electromagnetic wave radiation loss is suppressed , the amplitude of an RF signal is boosted , and insertion of a capacitor needed for bias application is not needed because for a open stub element to be in the DC and open state; by making a micro-capacitor element having the capacitance between 0.01 pF and 0.2 pF , and the λg/2 open stub element resonate in series to carry out impedance conversion of the input RF signal.11. The microwave frequency band stub resonance booster circuit according to claim 10 , wherein the boost ratio is between 19 times to 33 times in case for the amplitude of the RF signal to be boosted.1212112. A microwave band booster rectifier circuit claim 10 , wherein an anode or cathode terminal of a rectifier diode element and a terminal of a rectifier diode element which is opposite to that of the rectifier diode element in polarity are connected to a connection point between said micro-capacitor ...

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Номер записи: 72
28-11-2013 дата публикации

LOW NOISE AMPLIFIERS FOR CARRIER AGGREGATION

Номер: US20130315348A1
Автор: Davierwalla Anosh Bomi, Tasic Aleksandar Modrag
Принадлежит: QUALCOMM INCORPORATED

Low noise amplifiers (LNAs) supporting carrier aggregation are disclosed. In an exemplary design, an apparatus includes first and second amplifier stages, e.g., for a carrier aggregation (CA) LNA or a multiple-input multiple-output (MIMO) LNA. The first amplifier stage receives and amplifies an input radio frequency (RF) signal and provides a first output RF signal to a first load circuit when the first amplifier stage is enabled. The input RF signal includes transmissions sent on multiple carriers at different frequencies to a wireless device. The second amplifier stage receives and amplifies the input RF signal and provides a second output RF signal to a second load circuit when the second amplifier stage is enabled. Each amplifier stage may include a gain transistor coupled to a cascode transistor. 1. An apparatus comprising:a first amplifier stage configured to receive and amplify an input radio frequency (RF) signal and provide a first output RF signal to a first load circuit when the first amplifier stage is enabled, the input RF signal comprising transmissions sent on multiple carriers at different frequencies to a wireless device; anda second amplifier stage configured to receive and amplify the input RF signal and provide a second output RF signal to a second load circuit when the second amplifier stage is enabled.2. The apparatus of claim 1 , the first amplifier stage comprising a first gain transistor coupled to a first cascode transistor claim 1 , the second amplifier stage comprising a second gain transistor coupled to a second cascode transistor claim 1 , and the input RF signal being provided to both the first and second gain transistors.3. The apparatus of claim 2 , the first amplifier stage further comprising a first inductor coupled to the first gain transistor claim 2 , and the second amplifier stage further comprising a second inductor coupled to the second gain transistor.4. The apparatus of claim 2 , the first and second gain transistors having ...

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Номер записи: 73
05-12-2013 дата публикации

Method and User Equipment for Carrier Aggregation

Номер: US20130322575A1
Автор: Briceno Mauricio, Muquet Bertrand
Принадлежит:

User equipment is provided for receiving an OFDM signal. The user equipment includes a plurality of carrier processing chains and a carrier aggregation module, aggregating the signals received on each carrier processed by the plurality of carrier processing chains. The aggregation module delivers a set of aggregated signals of the plurality of carrier processing chains at the input of a Fast Fourier Transform module of a PHY layer processing subsystem of the user equipment. The Fast Fourier transform module is able to process a size of data according to a predetermined rate depending on the aggregated bandwidth of the set of aggregated signals of the plurality of carrier processing chains, and the carrier aggregation module includes at least one frequency shifter for frequency shifting carriers. 1. User equipment for receiving an OFDM signal , said user equipment comprising:a plurality of carrier processing chains,a carrier aggregation module configured to aggregate signals received on each carrier processed by said plurality of carrier processing chains and to deliver a set of aggregated signals of said plurality of carrier processing chains, said carrier aggregation module comprising at least one frequency shifter for frequency shifting carriers,a PHY layer processing subsystem comprising a Fast Fourier Transform module having an input, which receives the delivered set of aggregated signals, said Fast Fourier transform (FFT) module being configured to process a size of data according to a predetermined rate depending on an aggregated bandwidth of said set of aggregated signals of said plurality of carrier processing chains.2. The user equipment for receiving an OFDM signal according to claim 1 , wherein said carrier aggregation module comprises:at least one oversampler configured to oversample the received signal on each carrier,an adder configured to add the signals received on each carrier, delivering said set of aggregated signals of said plurality of carrier ...

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Номер записи: 74
05-12-2013 дата публикации

DETECTING CIRCUIT AND RELATED DETECTING METHOD

Номер: US20130322577A1
Автор: Chao Kuan-Hua, Hung Tzu-Li, Nian Yu-Bang
Принадлежит: MEDIATEK INC.

A detecting circuit includes: a first offset generating circuit, arranged to apply a first offset to an input signal pair and accordingly generate a first output signal pair; and a first sampling circuit, coupled to the first offset generating circuit, the first sampling circuit arranged to sample the first output signal pair to generate a first sampling signal, wherein the first sampling signal is utilized to identify a data signal on the input signal pair, and the first sampling circuit is controlled by a first signal that is irrelevant to the input signal pair. 1. A detecting circuit , comprising:a first offset generating circuit, arranged to apply a first offset to an input signal pair and accordingly generate a first output signal pair; anda first sampling circuit, coupled to the first offset generating circuit, the first sampling circuit arranged to sample the first output signal pair to generate a first sampling signal, wherein the first sampling signal is utilized to identify a data signal on the input signal pair, and the first sampling circuit is controlled by a first signal that is irrelevant to the input signal pair.2. The detecting circuit of claim 1 , wherein the first offset generating circuit applies the first offset to the input signal pair in order to provide different common mode voltages to a first positive output signal and a first negative output signal of the first output signal pair.3. The detecting circuit of claim 2 , wherein the common mode voltage of the first positive output signal is the common mode voltage of the first negative output signal minus the first offset claim 2 , and the first sampling signal is utilized to identify the data signal with amplitude larger than the first offset.4. The detecting circuit of claim 1 , wherein the first sampling circuit comprises a D type flip-flop or a sense amplifier-based flip flop.5. The detecting circuit of claim 1 , wherein the first offset generating circuit comprises:a current source, ...

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Номер записи: 75
05-12-2013 дата публикации

TUNING CIRCUIT

Номер: US20130324067A1
Автор: Inaba Shinya, Odajima Toru, Sekiguchi Satoru
Принадлежит: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

To adjust a tuning frequency without an output being muted while an oscillation frequency is adjusted. A tuning circuit includes a pair of an inductor and a tuning variable capacitor unit, adjusts a tuning frequency by changing a capacitance of the tuning variable capacitor unit, and obtains a tuning signal having a limited band from a received signal. The tuning circuit includes an oscillating inductor that passes a current corresponding to the tuning signal, an oscillating variable capacitor unit that adjusts the oscillation frequency of a system including the oscillating inductor, and a controller that changes a capacitance of the oscillating variable capacitor unit correspondingly to a desired tuning frequency while adjusting the capacitance such that the oscillation frequency corresponds to the desired tuning frequency, and adjusts a capacitance of the tuning variable capacitor unit in accordance with the adjusted capacitance of the oscillating variable capacitor unit. 1. A tuning circuit obtaining a tuning signal having a limited band from a received signal , comprising:a tuning inductor that passes the tuning signal selected from the received signal;a tuning variable capacitor unit that adjusts a tuning frequency of a system including the tuning inductor;an oscillating inductor that passes an oscillation signal corresponding to the tuning signal;an oscillating variable capacitor unit that adjusts an oscillation frequency of a system including the oscillating inductor; anda controller that adjusts a capacitance of the oscillating variable capacitor unit such that the oscillation frequency has a value corresponding to a desired tuning frequency and adjusts a capacitance of the tuning variable capacitor unit in accordance with the adjusted capacitance of the oscillating variable capacitor unit.2. The tuning circuit according to claim 1 , wherein the oscillation frequency of the system including the oscillating inductor is an integral multiple of the tuning ...

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Номер записи: 76
02-01-2014 дата публикации

INTERFERENCE SIGNAL DIVERSITY COMBINING FOR INTERFERENCE CANCELLATION

Номер: US20140003479A1
Автор: Chen Wanshi, Huang Yi, Luo Tao, Mallik Siddhartha
Принадлежит:

A method of wireless communication includes receiving a first interference signal and a second interference signal. The method further includes determining whether the second interference signal includes a different version of the first interference signal. Additionally, the method includes combining the first interference signal and the second interference signal to estimate an interference cancellation signal when the second interference signal is the different version of the first interference signal. 1. A method of wireless communication by a wireless device in a wireless communication system , comprising:receiving a first interference signal at a receiver;receiving a second interference signal at the receiver;determining whether the second interference signal comprises a different version of the first interference signal; andcombining the first interference signal and the second interference signal to estimate an interference cancellation signal when the second interference signal is the different version of the first interference signal.2. The method of claim 1 , further comprising applying the combined signal in an interference cancellation process.3. The method of claim 1 , further comprising:storing a first value associated with the first interference signal and a second value associated with the second interference signal in a buffer associated with the receiver, the second interference signal being the different version of the first interference signal;in which the interference cancellation signal is based at least in part on a combination of the first value and the second value.4. The method of claim 3 , further comprising:iteratively updating stored values of a number of interference signals in the buffer based at least in part on the interference cancellation signal; andgenerating at least another interference cancellation signal based at least in part on the updated stored values.5. The method of claim 3 , further comprising:selectively weighing the ...

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Номер записи: 77
09-01-2014 дата публикации

METHOD FOR INTERFERENCE AND CARRIER POWER ESTIMATION AND ITS APPLICATION TO AUTOMATIC GAIN CONTROL AND SIGNAL-TO-INTERFERENCE-AND-NOISE-RATIO COMPUTATION

Номер: US20140010267A1
Автор: Das Sajal Kumar, JACOB Naveen, JANDIAL Ravi
Принадлежит: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

A system and method are provided for estimating interference power at a receiver antenna in a communications systems receiver, in which an interference type signal associated with a received radio signal is detected, an in-band interference power associated with the received radio signal is determined, and an interference power at the antenna is estimated using the determined in-band interference power and the detected interference type. Estimating the interference power at the antenna includes interpolating the determined in-band interference power using scaling factors determined by the interference type signal associated with the received radio signal. The system and method determine in-band carrier power associated with the radio signal based on a channel estimate h(k), and the in-band interference information is based on interference samples I(n). In addition, an average total power, automatic gain control (AGC) setting, and signal-to-information-and-noise ratio can be determined by the system and method. 1. A method for estimating interference power at a receiver antenna in a communications systems receiver , comprising:detecting an interference type signal associated with a received radio signal;determining an in-band interference power associated with the received radio signal; andestimating an interference power at the antenna using the determined in-band interference power and the detected interference type.2. The method according to claim 1 , wherein the step of estimating the interference power at the antenna comprises:interpolating the determined in-band interference power using scaling factors determined by the interference type signal associated with the received radio signal.3. The method according to claim 2 , further comprising:determining in-band carrier power associated with the radio signal based on a channel estimate h(k), and further wherein the in-band interference information is based on interference samples I(n).4. The method according to ...

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Номер записи: 78
16-01-2014 дата публикации

EDGE BASED PARTIAL RESPONSE EQUALIZATION

Номер: US20140016692A1
Автор: Lee Hae-Chang, Leibowitz Brian S., Ratnayake Ruwan, Ren Jihong
Принадлежит: RAMBUS INC.

A device implements data reception with edge-based partial response decision feedback equalization. In an example embodiment, the device implements a tap weight adapter circuit that sets the tap weights that are used for adjustment of a received data signal. The tap weight adapter circuit sets the tap weights based on previously determined data values and input from an edge analysis of the received data signal using a set of edge samplers. The edge analysis may include adjusting the sampled data signal by the tap weights determined by the tap weight adapter circuit. A clock generation circuit generates an edge clock signal to control the edge sampling performed by the set of edge samplers. The edge clock signal may be generated as a function of the signals of the edge samplers and prior data values determined by the equalizer. 1sampling a data signal having a voltage value at an expected edge time of the data signal:generating a first alpha value and a second alpha value in dependence upon the voltage value;adjusting the data signal by the first alpha value to derive a first adjusted signal;adjusting the data signal by the second alpha value to derive a second adjusted signal;sampling the first adjusted signal to output a first data value;sampling the second adjusted signal to output a second data value; andselecting between the first data value and the second data value as a function of a prior received data value to determine a received data value.. A method comprising: This application is a Continuation of U.S. application Ser. No. 12/513,898, filed Dec. 23, 2009, which is the national phase entry of International Application No. PCT/U.S.2007/023600, filed Nov. 9,2007, which claims benefit of priority to U.S. Provisional Application No. 60/859,820, filed Nov. 16, 2006; all of the priority claims are hereby incorporated by Reference in their entirety for all purposes.The performance of conventional digital systems is limited by the transmission interconnection ...

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Номер записи: 79
30-01-2014 дата публикации

RECEPTION DEVICE AND RECEPTION METHOD

Номер: US20140029661A1
Автор: Hasegawa Ryo, Kawauchi Hidetoshi, MARUYAMA HIROFUMI, TAKAOKA Katsumi, YOSHIMOCHI Naoki
Принадлежит: SONY CORPORATION

The present technique relates to a reception device and a reception method which can improve equalization performance. An equalization processing unit has a time domain equalization unit which equalizes a received signal in a time domain and a frequency domain equalization unit which is provided in parallel to the time domain equalization unit and which equalizes the received signal in a frequency domain, and performs control of switching between the time domain equalization unit and the frequency domain equalization unit. The present technique can be applied to, for example, equalize a signal of data transmitted by way of single carrier transmission or data transmitted by way of multicarrier transmission. 1. A reception device comprising:a time domain equalization unit which equalizes a received signal in a time domain;a frequency domain equalization unit which is provided in parallel to the time domain equalization unit and which equalizes the received signal in a frequency domain; andan equalization method control unit which performs control of switching between the time domain equalization unit and the frequency domain equalization unit.2. The reception device according to claim 1 , wherein the received signal is a signal defined according to a GB20600-2006 standard claim 1 , and claim 1 , when a C3780 signal defined according to the GB20600-2006 standard is received claim 1 , the frequency equalization unit equalizes the received signal and claim 1 , when a C1 signal defined according to the GB20600-2006 standard is received claim 1 , the equalization method control unit switches between the time domain equalization unit and the frequency domain equalization unit to equalize the received signal.3. The reception device according to claim 1 , wherein the frequency domain equalization unit comprises:a FFT operating unit which converts the received signal into a frequency domain signal; anda distortion compensation unit which compensates for distortion of the ...

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Номер записи: 80
30-01-2014 дата публикации

ANALOG SIGNAL PROCESSING DEVICE FOR PHASED ARRAY ANTENNAS

Номер: US20140030994A1
Автор: Arnaudov Radosvet, Avdjiski Bojidar, BARAK ILAN, Kostov Alexander, Marinov Borislav
Принадлежит: GILAT SATELLITE NETWORKS LTD.

A signal processing device includes a device package, processing circuitry and biasing circuitry. The processing circuitry is packaged in the device package and is operative to receive one or more Radio Frequency (RF) input signals from one or more antenna elements via one or more pre-amplifiers that are separate from the device, and to process the RF input signals so as to produce an RF output signal. The biasing circuitry is packaged in the device package and is operative to produce one or more biasing signals for biasing the pre-amplifiers. 124-. (canceled)25. A system , comprising:at least one antenna element;a preamplifier operative to receive one or more radio frequency (RF) input signals from the at least one antenna element; andbiasing circuitry operative to produce one or more constant-current biasing signals for biasing the preamplifier with a predefined, constant current over an RF input circuit.26. The system of claim 25 , comprising processing circuitry configured to receive the one or more RF input signals from the preamplifier via the RF input circuit.27. The system of claim 26 , wherein the processing circuitry comprises a first programmable gain stage and a second programmable gain stage claim 26 , the first programmable gain stage being configured to modify an amplitude of a first of the one or more RF input signals by a first factor claim 26 , the second programmable gain stage being configured to modify an amplitude of a second of the one or more RF input signals by a second factor.28. The system of claim 27 , wherein the processing circuitry is configured to select the first factor and the second factor from a predefined set of non-uniformly-spaced factors.29. The system of claim 27 , wherein at least one of the first programmable gain stage and the second programmable gain stage is configured to be digitally controlled.30. A device claim 27 , comprising:a first programmable gain stage configured to modify a first radio frequency (RF) signal by ...

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Номер записи: 81
06-02-2014 дата публикации

Methods and Systems for Self-Referencing Single-Ended Signals

Номер: US20140036977A1
Автор: Bucher Michael, Luo Lei
Принадлежит:

A single-ended receiver compares signal levels representing current symbols to levels representing immediately preceding symbols to resolve the symbols. The receiver applies offsets selected based on resolved prior symbols to interpret successive like-symbols. 1. A circuit comprising:a data node to receive a series of data symbols, including even data symbols and odd data symbols represented as even and odd signal levels;an even sample-and-hold circuit coupled to the data node to sample and hold the even signal levels;an odd sample-and-hold circuit coupled to the data node to sample and hold the odd signal levels;a sampling circuit coupled to the even and odd sample-and-hold circuits, the sampling circuit to compare the even signal levels to the odd signal levels to produce even samples, and to compare the odd signal levels to the even signal levels to produce odd samples; anda feedback circuit coupled to the sampling circuit, the feedback circuit to offset the comparisons that produce the even and odd samples, respectively, based on the immediately prior odd and even samples.2. The circuit of claim 1 , wherein the feedback circuit applies claim 1 , for an even sample claim 1 , an offset of a first polarity when the immediately prior odd sample represents a first logic state claim 1 , and applies an offset of a second polarity when the immediately prior odd sample represents a second logic state.3. The circuit of claim 2 , wherein the offset of the first polarity is of a magnitude and the offset of the second polarity is of the same magnitude.4. The circuit of claim 1 , wherein the sampling circuit includes a data node and a reference node claim 1 , and wherein the feedback circuit applies the offset to the reference node.5. The circuit of claim 1 , wherein the sampling circuit includes an even sampler to produce the even samples and an odd sampler to produce the odd samples.6. The circuit of claim 5 , wherein the even sampler compares each of the even signal levels ...

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Номер записи: 82
06-02-2014 дата публикации

Receiver and Receiving Method

Номер: US20140037032A1
Автор: Tao Zhenning, YAN Meng
Принадлежит: FUJITSU LIMITED

Embodiments of the present invention provide a receiver and a receiving method. The receiver comprises: a branch forming unit a plurality of signal branches; each of the signal branches comprising a joint processing unit; and the joint processing unit being used to eliminate an inter-carrier interference of the subcarrier signal in a present signal branch and the subcarrier signals in other signal branches adjacent to the present signal branch. With the embodiments of the present invention, the inter-carrier interference may be eliminated and the performance of the system may be improved; and the sampling rate of the analog digital converter may also be lowered. 1. A receiver , comprising:a branch forming unit, configured to divide a signal from a transmitter into multiple branches of subcarrier signals; anda plurality of signal branches, each of the signal branches comprising a joint processing unit, the joint processing unit being used to eliminate an inter-carrier interference of the subcarrier signal in a present signal branch and the subcarrier signals in other signal branches adjacent to the present to signal branch.2. The receiver according to claim 1 , wherein the joint processing unit comprises:a plurality of filters, each of the filters being used to filter the subcarrier signal in the present signal branch and the subcarrier signals in other signal branches adjacent to the present signal branch according to a filtering coefficient; andan adder, configured to add up the output results of the plurality of filters.3. The receiver according to claim 2 , wherein each of the filters processes a plurality of consecutive sampling values of a subcarrier signal.4. The receiver according to claim 2 , wherein the signal branch further comprises:a coefficient updating unit, configured to update the filtering coefficient of each of the filters of the joint processing unit based on the subcarrier signal being eliminated the inter-carrier interference.5. The receiver ...

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Номер записи: 83
06-02-2014 дата публикации

METHOD AND TELECOMMUNICATIONS DEVICE FOR ANALYZING MULTIPLE CARRIERS IN RADIO FREQUENCY SIGNAL

Номер: US20140038538A1
Автор: Kuo Chun-Ming, Shen Shih-Chi
Принадлежит:

An embodiment of the invention provides a method of processing a radio frequency (RF) signal. According to the embodiment, the RF signal is first synthesized with a synthesis signal to generate a synthesized signal. Then, the synthesized signal is filtered with a filtering bandwidth to generate a filtered signal. Next, the filtered signal is converted into digital data. Then, the digital data is processed to analyze a plurality of carriers within the filtering bandwidth as presented in the RF signal. 1. A method of processing a radio frequency (RF) signal , comprising:synthesizing the RF signal with a synthesis signal to generate a synthesized signal;filtering the synthesized signal with a filtering bandwidth to generate a filtered signal;converting the filtered signal into digital data; andprocessing the digital data to analyze a plurality of carriers within the filtering bandwidth as presented in the RF signal.2. The method of claim 1 , wherein at least one of the carriers has a frequency at least 200 kHz away from a frequency of the synthesis signal.3. The method of claim 1 , wherein each of the carriers is a broadcast control channel (BCCH) carrier.4. The method of claim 1 , wherein the step of filtering the synthesized signal comprises:filtering the synthesized signal with an upper cutoff frequency of at least 500 kHz.5. The method of claim 1 , wherein the step of converting the filtered signal into the digital data comprises:converting the filtered signal into the digital data with a sampling frequency of at least 50 MHz.6. The method of claim 1 , wherein the step of processing the digital data to analyze the plurality of carriers within the filtering bandwidth as presented in the RF signal comprises:for each of the plurality of carriers within the filtering bandwidth, performing digital frequency down conversion on the digital data to generate frequency down-converted data and then processing the frequency down-converted data to analyze this carrier as ...

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Номер записи: 84
06-02-2014 дата публикации

IMBALANCE CORRECTION IN A DEMODULATOR WITH FULL BAND SAMPLING

Номер: US20140038539A1
Автор: Meyer Jacques
Принадлежит: STMICROELECTRONICS (GRENOBLE 2) SAS

A method for demodulating phase quadrature modulated signals in a band of channels includes transposing the band around zero, and selecting a channel in the transposed band. A first pair of phase quadrature signals forming a first complex signal is extracted from the selected channel. A second pair of phase quadrature signals forming a second complex signal is extracted from a symmetrical channel of the selected channel. The method further includes establishing a correlation product based on the first and second complex signals, and correcting the two complex signals to make the correlation product tend towards zero. 17-. (canceled)8. A method for demodulating phase quadrature modulated signals in a band having a plurality of channels , the method comprising:transposing the band around zero;selecting a channel in the transposed band;extracting from the selected channel a first pair of phase quadrature signals forming a first complex signal;extracting from a symmetrical channel of the selected channel a second pair of phase quadrature signals forming a second complex signal;establishing a correlation product between an error of the first complex signal relative to its estimated value and the second complex signal; andcorrecting the first and second complex signals to make the correlation product tend towards zero.9. The method of claim 8 , wherein the correction is carried out with a matrix having coefficients determined from a complex value obtained by dividing the correlation product by a power of a received signal corresponding to the second complex signal.11. The method of claim 8 , wherein the correlation product and the correction are carried out during reception of a header including known symbols claim 8 , with the estimated value assuming the known values of the symbols.12. A method for demodulating signals comprising:transposing a frequency band around a selected frequency, with the frequency band having a plurality of channels therein;selecting a channel ...

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Номер записи: 85
13-02-2014 дата публикации

APPARATUS HAVING AND METHOD FOR IMPLEMENTING A DISTRIBUTED ARCHITECTURE FOR RECEIVING AND/OR TRANSMITTING RADIO FREQUENCY SIGNALS

Номер: US20140044026A1
Автор: JR. HANS ALRED, TROEMEL
Принадлежит: Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America

A distributed architecture system for receiving radio frequency (RF) signals includes a receiving unit receiving a plurality of RF signals. The receiving unit includes means for combining the plurality of RF signals into a multiplexed signal. A head unit receives and separates the multiplexed signal into a plurality of information signals. The head unit prepares the information signals for presentation to a user. The head unit is disposed remotely from the receiving unit. A multiplexed link carries the multiplexed signal from the receiving unit to the head unit. 1. A device for receiving radio frequency signals , comprising:means for receiving a plurality of radio frequency (RF) signals;means for combining said plurality of RF signals into a multiplexed signal;means for separating said multiplexed signal into a plurality of information signals, each information signal corresponding to a respective one of said plurality of RF signals, said means for separating being disposed remotely from said means for receiving and said means for combining; andmeans for providing said multiplexed signal from said means for combining to said means for separating, said means for providing comprising a coaxial cable configured to carry a supply voltage to at least one of said means for separating and said means for combining.2. The device of claim 1 , wherein said means for combining and said means for separating comprise respective multiplexers.3. The device of claim 1 , further comprising means for converting said plurality of RF signals into a corresponding plurality of intermediate frequency (IF) signals claim 1 , said IF signals being combined by said means for combining into said multiplexed signal.4. The device of claim 3 , wherein said means for receiving claim 3 , said means for converting claim 3 , and said means for combining are disposed remotely from said means for separating.5. The device of claim 3 , further comprising a plurality of baseband units claim 3 , each said ...

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Номер записи: 86
13-02-2014 дата публикации

Successive Interference Cancellation Stacked Branch VAMOS Receivers

Номер: US20140044107A1
Автор: JACOB Naveen
Принадлежит:

A receiver receives a desired radio sub-channel transmitted with an unwanted radio sub-channel by producing signal branches from a received radio signal by treating orthogonal components of the received signal separately and also by using one or both of oversampling and multiple receive antennas. Channel estimates for both the desired and unwanted radio sub-channels are produced for signal branches. The unwanted radio sub-channel bits are estimated from a non-stacked form of the received radio signal. The channel estimates and the estimate of the unwanted radio sub-channel bits are used to reconstruct unwanted radio sub-channel components separately for signal branches. Desired radio sub-channel signal branches are produced by subtracting a corresponding one of the reconstructed unwanted radio sub-channel components from signal branches. A non-stacked desired signal is produced by combining the desired radio sub-channel signal branches. The non-stacked desired signal is processed to receive the desired radio sub-channel. 1. A method of receiving a desired radio sub-channel transmitted by a transmitter during a time slot , wherein an unwanted radio sub-channel is also transmitted by the transmitter during the time slot and wherein the desired and unwanted radio sub-channels are orthogonal to one another at the time of transmission , the method comprising:receiving a radio signal during the time slot, wherein the radio signal comprises the desired and unwanted radio sub-channels;producing a plurality of signal branches from the received radio signal by treating orthogonal components of the received signal as separate branches and also by generating separate signal branches by one or both of oversampling and using multiple receive antennas;using joint channel estimation to independently process more than one of the signal branches and to produce therefrom for each of the more than one of the signal branches a channel estimate for the desired radio sub-channel and a ...

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Номер записи: 87
13-02-2014 дата публикации

SIGNAL SAMPLING CIRCUIT AND RADIO RECEIVER

Номер: US20140045444A1
Автор: Furuta Masanori, Matsuno Junya
Принадлежит:

According to some embodiments, there is provided a signal sampling circuit in which the first sampling capacitor is connected to the first sampling switch, the second sampling capacitor is connected to the second sampling switch, the amplifier outputs a positive-side amplified signal by amplifying a signal input to the positive-side input terminal thereof and outputs a negative-side amplified signal by amplifying a signal input to the negative-side input terminal thereof, the first chopper switch is connected to the first sampling capacitor and the positive-side input terminal, the second chopper switch is connected to the first sampling capacitor and the negative-side input terminal, the third chopper switch is connected to the second sampling capacitor and the positive-side input terminal and the fourth chopper switch is connected to the second sampling capacitor and the negative-side input terminal. 1. A signal sampling circuit comprising:a first sampling switch to receive a positive-side analog signal at one end;a second sampling switch to receive a negative-side analog signal at one end;a first sampling capacitor connected to another end of the first sampling switch at one end, and to a fixed voltage at another end;a second sampling capacitor connected to another end of the second sampling switch at one end, and to the fixed voltage at another end;an amplifier including a positive-side input terminal and a negative-side input terminal, and configured to output a positive-side amplified signal by amplifying a signal input to the positive-side input terminal, and output a negative-side amplified signal by amplifying a signal input to the negative-side input terminal;a first chopper switch connected to the one end of the first sampling capacitor at one end, and to the positive-side input terminal at another end;a second chopper switch connected to the one end of the first sampling capacitor at one end, and to the negative-side input terminal at another end;a third ...

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Номер записи: 88
20-02-2014 дата публикации

METHODS AND ARRANGEMENTS FOR PHASE TRACKING IN WIRELESS NETWORKS

Номер: US20140050259A1
Автор: Azizi Shahrnaz, Kenney Thomas J., Perahia Eldad
Принадлежит:

Logic may determine phase correction information from pilot tones. Logic may determine phase correction information from some of the pilot locations. Logic may process the shifting pilot tones for less than all of the pilot tones. Logic may process pilot tones at any location within orthogonal frequency division multiplexing (OFDM) packet. Logic may determine to process only pilot tones at the even or odd symbol indices or subcarriers. And logic may transmit a packet with a frame with a capabilities information field comprising an indication that a receiver may can process shifting pilot tones for phase tracking. 1. A method to phase track with shifting pilot tones , the method comprising:receiving an orthogonal frequency division multiplexing (OFDM) transmission of a packet with pilot tones shifting locations between OFDM symbols;setting initial weight coefficients for equalization based upon a long training sequence in response to receiving a preamble of the packet;determining phase correction information based upon the pilot tones during the OFDM transmission from more than one of the OFDM symbols; andprocessing the packet with equalization based on the initial weight coefficients, wherein processing the packet comprises updating phase tracking in response to the phase correction information determined from the pilot tones in the more than one OFDM symbols.2. The method of claim 1 , further comprising transmitting a frame with a capability information field comprising an indication that a receiver updates phase tracking with the pilot tones that shift locations between OFDM symbols.3. The method of claim 1 , wherein receiving comprises receiving the OFDM transmission with pilot tones shifting every N OFDM symbols.4. The method of claim 1 , wherein receiving comprises receiving the OFDM transmission with pilot tones shifting every OFDM symbol.5. The method of claim 1 , wherein receiving comprises receiving the OFDM transmission via an antenna array.6. The method ...

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Номер записи: 89
20-02-2014 дата публикации

DATA SLICER FOR REDUCING SYSTEM START-UP TIME AND RECEIVER WITH THE SAME

Номер: US20140050287A1
Автор: CHIANG Tsung-Yuan, KAO Nien-An
Принадлежит: PRINCETON TECHNOLOGY CORPORATION

A receiver for reducing a system start-up time includes an antenna, an RF (Radio Frequency) circuit, a demodulation circuit, and a data slicer. The data slicer includes a filter, a comparator, a switch, and a delay generator. The filter filters a demodulated signal so as to generate a threshold level. The comparator has a positive input terminal for receiving the demodulated signal and a negative input terminal for receiving the threshold level. The comparator compares the demodulated signal with the threshold level so as to generate a digital signal. The switch is coupled between the positive input terminal and the negative input terminal. The delay generator determines whether or not to close the switch during a delay time according to an enable signal. 1. A receiver for reducing a system start-up time , comprising:an antenna, receiving an RF (Radio Frequency) signal;an RF circuit, generating a mid-band signal according to the RF signal;a demodulation circuit, demodulating the mid-band signal so as to generate a demodulation signal; and a filter, filtering the demodulation signal so as to generate a threshold level;', 'a comparator, having a positive input terminal for receiving the demodulation signal and a negative input terminal for receiving the threshold level, wherein the comparator compares the demodulation signal with the threshold level so as to generate a digital signal;', 'a switch, coupled between the positive input terminal and the negative input terminal; and', 'a delay generator, determining whether or not to close the switch during a delay time according to an enable signal., 'a data slicer, comprising2. The receiver as claimed in claim 1 , wherein the delay generator further adjusts the delay time according to a control signal.3. The receiver as claimed in claim 1 , wherein when the enable signal is changed from a ground voltage to a work voltage claim 1 , a delay time is started and the delay generator closes the switch during the delay time ...

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Номер записи: 90
20-02-2014 дата публикации

ELECTRONIC DEVICE AND ANTENNA RECEPTION TUNING METHOD THEREOF

Номер: US20140051375A1
Автор: Chen Chang-Chih, Hung Kuo-Chiang, Hwang Chieh-Tsao, Liu Shih-Chia, WANG Cheng-Wen
Принадлежит:

An electronic device and an antenna reception tuning method thereof are provided. The electronic device includes a first main body, a second main body, a sensing unit, and a processing unit. The second main body, including an antenna and a matching unit, is disposed on the first main body through a hinge and adapted for being opened or closed relative to the first main body. The sensing unit is disposed on the electronic device, adapted for detecting a distance between the first main body and the second main body, and generates a control signal according to the distance, wherein the distance includes an angle and an open/close state between the first and the second main bodies. The processing unit is electrically connected to the sensing unit and the matching unit, and adjusts the matching unit according to the received control signal. 1. An electronic device , comprising:a first main body;a second main body, comprising at least one antenna and a matching unit and disposed on the first main body through a hinge, the second main body being adapted for being opened or closed relative to the first main body;a sensing unit disposed on the electronic device, detecting a distance between the first main body and the second main body, and generating a control signal according to the distance; anda processing unit electrically connected to the sensing unit and the matching unit and adjusting the matching unit according to the received control signal.2. The electronic device according to claim 1 , wherein the distance comprises an angle between the first main body and the second main body.3. The electronic device according to claim 1 , wherein the distance comprises an open/close state of the first main body and the second main body.4. The electronic device according to claim 2 , wherein:the processing unit determines whether a setting of the matching unit is an optimizing impedance matching circuit according to the angle, andwherein if the matching unit is not the optimizing ...

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Номер записи: 91
20-02-2014 дата публикации

ANTENNA ARRANGEMENT

Номер: US20140051376A1
Автор: SAVOLAINEN Risto Kalevi
Принадлежит: BLUESKY POSITIONING LIMITED

An antenna (-) for use in a mobile device (-) includes elements for receiving (-----) a signal from a satellite positioning system; a first layer of dielectric material (----------) and a second layer of dielectric material (--4--------), wherein the elements for receiving (------) the signal is at least partly between the first dielectric layer (----------) and the second dielectric layer (----------). 1. An antenna for use in a mobile device or in a stand-alone device , comprising:a receiving element adapted to receive a signal from satellite positioning systems;adapting elements matched to the receiving element to different frequencies from the satellite positioning systems;a first layer of dielectric material; anda second layer of dielectric material, wherein the receiving element is configured to be at least partly located between the first dielectric layer and the second dielectric layer.2. The antenna according to claim 1 , wherein at least one of the first and second dielectric layers is adapted to the frequency of the signal.3. The antenna according to claim 1 , wherein at least one of a dielectric constant claim 1 , a dielectric loss and a thickness of at least one of the first and second dielectric layers is adapted to the frequency of the signal.4. The antenna according to claim 1 , wherein a thickness of the first dielectric layer substantially equals a thickness of the second dielectric layer.5. The antenna according to claim 1 , wherein a thickness of the first and second dielectric layers is one of i) one quarter and ii) one half of a wavelength of the received signal.6. The antenna according to claim 1 , wherein the first dielectric layer is substantially two times thicker than the second dielectric layer.7. The antenna according to claim 1 , wherein a thickness of the first dielectric layer is substantially one half of a wavelength of the received signal and a thickness of the second dielectric layer is substantially one quarter of a wavelength of ...

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Номер записи: 92
27-02-2014 дата публикации

SYSTEMS AND METHODS FOR IMPLEMENTING A MULTI-SENSOR RECEIVER IN A DSM3 ENVIRONMENT

Номер: US20140056396A1
Автор: ALLOIN Laurent Francis, Mahadevan Amitkumar, Pierrugues Laurent
Принадлежит: IKANOS COMMUNICATIONS, INC.

In accordance with one embodiment, a method is implemented in a vectored system for improving a signal-to-noise ratio (SNR) of a far end transmitted signal on a victim line in the system. The method comprises mitigating, by the vectored system, self-induced far-end crosstalk (self-FEXT) on the victim line based on self-FEXT mitigation coefficients and receiving, by a second sensor, information relating to at least one of: self-FEXT of the vectored system, external noise, and the far end transmitted signal. The method further comprises learning, at the second sensor, coefficients relating to self-FEXT coupling into the second sensor and removing self-FEXT from the second sensor based on the learned coefficients. Upon removal of self-FEXT from the second sensor, a linear combiner configured to combine information relating to the victim line and the second line is learned. 1receiving, by the victim line, one or more of: the far end transmitted signal, self-induced far-end crosstalk (self-FEXT) of a vectored system, and external noise;receiving, by a second sensor, information relating to a noise source comprising one or more of: the far end transmitted signal, self-induced far-end crosstalk (self-FEXT) of a vectored system, and external noise, wherein the second sensor is configured to receive the information relating to the noise source exclusive of any useful signals in the system;learning, at the second sensor, coefficients relating to self-FEXT coupling into the second sensor;removing self-FEXT from the second sensor based on the learned coefficients;upon removal of self-FEXT from the second sensor, learning a linear combiner configured to combine information relating to the victim line and the noise source; andapplying the learned linear combiner.. A method implemented in customer premises equipment (CPE) for improving a signal-to-noise ratio (SNR) of a far end transmitted signal on a victim line, comprising: This application is a Continuation of U.S. patent ...

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Номер записи: 93
27-02-2014 дата публикации

Method and System for Low-Noise, Highly-Linear Receiver Front-End

Номер: US20140057584A1
Автор: DARABI HOOMAN, Mikhemar Mohyee, Mirzaei Ahmad, Murphy David
Принадлежит: BROADCOM CORPORATION

Aspects of a method and system for a low-noise, highly-linear receiver front-end are provided. In this regard, a received signal may be processed via one or more transconductances, one or more transimpedance amplifiers (TIAs), and one or more mixers to generate a first baseband signal corresponding to a voltage at a node of the receiver, and a second baseband signal corresponding to a current at the node of the receiver. The first signal and the second signal may be processed to recover information from the received signal. The first signal may be generated via a first one or more signal paths of the receiver and the second signal may be generated via a second one or more signal paths of the receiver. 1in a receiver comprising one or more transconductances, one or more transimpedance amplifiers, and one or more mixers, a first baseband signal corresponding to a voltage at a node of said receiver; and', 'a second baseband signal corresponding to a current at said node of said receiver; and, 'processing a received signal said one or more transconductances, said one or more transimpedance amplifiers, and said one or more mixers to generateprocessing, in said receiver, said first signal and said second signal to recover information from said received signal.. A method, comprising: Certain embodiments of the invention relate to wireless communications. More specifically, certain embodiments of the invention relate to a method and system for low-noise, highly-linear receiver front-end.As the number of wireless standards and the range of frequencies of wireless communications continue to increase, there is increasing need for communication receivers that are capable of handling multiple wireless standards spanning a wide range of frequencies. Also, as the number of wireless devices and the amount of wireless communications taking place increase, these communication receivers have to function satisfactorily in the presence of large amounts of noise and interference.Further ...

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Номер записи: 94
27-02-2014 дата публикации

Systems and methods for improving the time alignment of non-overlapping waveforms

Номер: US20140057586A1
Автор: Alford Ronald C.
Принадлежит: CSR TECHNOLOGY

Systems and methods for improving the timing alignment of non-overlapping waveforms are provided. In this regard, a representative system, among others, includes a waveform synthesizer that generates a plurality of input waveforms and inverters having inputs and outputs, wherein the inverters receive the input waveforms at the inputs of the inverters and invert the input waveforms, producing a plurality of inverted waveforms at the outputs of the inverters. The system also includes NOR gates having inputs and outputs, wherein the NOR gates receive the plurality of inverted waveforms at the inputs of the NOR gates and pass through one of the inverted waveforms at the outputs of the NOR gates. 120-. (canceled)21. A system for improving the timing alignment of a non-overlapping waveforms comprising:a waveform synthesizer that generates a plurality of input waveforms;inverters having inputs and outputs, wherein the inverters receive the input waveforms at the inputs of the inverters and invert the input waveforms, producing a plurality of inverted waveforms at the outputs of the inverters; andNOR gates having inputs and outputs, wherein the NOR gates receive the plurality of inverted waveforms at the inputs of the NOR gates and pass through one of the inverted waveforms at the outputs of the NOR gates.22. The system as defined in claim 21 , wherein the NOR gates de-skew the received plurality of inverted waveforms.23. The system as defined in claim 21 , wherein the waveform synthesizer generates a plurality of duty cycle input waveforms that are in various degrees out of phase.24. The system as defined in claim 23 , wherein the inverters include a plurality of inverters that invert the plurality of duty cycle input waveforms claim 23 , producing a plurality of duty cycle inverted waveforms that are in various degrees out of phase claim 23 , respectively.25. The system as defined in claim 24 , wherein the NOR gates receive the plurality of duty cycle inverted waveforms ...

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Номер записи: 95
06-03-2014 дата публикации

Method of Handling Frequency-Domain Interpolation and Related Frequency-Domain Interpolator

Номер: US20140064414A1
Автор: Yong Yang
Принадлежит: Ali Shanghai Co Ltd

A frequency-domain interpolator for estimating a plurality of channels corresponding to a plurality of subcarriers comprises an edge pilot estimation unit, for generating a plurality of pilots according to a plurality of input pilots, a pilot interval ratio and a complexity parameter; a first selection unit, for selecting a plurality of pilot groups from the plurality of pilots according to the pilot interval ratio and the complexity parameter; a second selection unit, for generating a plurality of coefficient groups corresponding to the plurality of channels according to a channel profile and a used pilot interval, wherein each of the plurality of coefficient groups corresponds to a set of the plurality of channels; and a filter unit, for generating the plurality of channels according the plurality of pilot groups, the plurality of coefficient groups, and a relation between the plurality of pilot groups and the plurality of coefficient groups.

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Номер записи: 96
06-03-2014 дата публикации

Robust HARQ-ACK Design for MF-HSDPA

Номер: US20140064415A1
Автор: Hultell Johan, Von Wrycza Peter
Принадлежит:

When a UE () is configured with MF-HSDPA and HARQ-ACK information associated with cells () (characterized by potentially different downlink timing) is jointly encoded, only part of the existing Rel-9 HARQ-ACK codebook is reused. In one embodiment, only the codebook conflict arising from reuse of encodings is resolved. This is achieved by introducing a new codeword for at least one of the HARQ-ACK code words that are used multiple times in the existing Rel-9 codebook. In another embodiment, all codewords in the Rel-9 HARQ-ACK codebook having a Hamming distance smaller than a predetermined value (but not all codewords) are replaced. In yet another embodiment, all codewords in the Rel-9 HARQ-ACK codebook having a Hamming distance smaller than a predetermined value (but not all codewords) that would cause ambiguity at the NodeB receiver (i.e. where the interpretation of the HARQ-ACK information for one cell () depends on the number of streams transmitted at the other cell ()) are replaced. 115-. (canceled)16. A method of robust HARQ-ACK reporting by a UE , comprising:receiving transmissions from two or more cells, wherein each transmission includes one or more streams;jointly encoding a HARQ-ACK response for the two or more cells by encoding a HARQ-ACK codeword to resolve an ambiguity in a predetermined codebook of HARQ-ACK codewords, and such that the decoding of the jointly encoded HARQ-ACK codeword at each cell is independent of the number of streams in transmissions from other cells; andtransmitting the jointly encoded HARQ-ACK response to the two or more cells in a single channel.171. The method of claim wherein the predetermined codebook is specified in Table 15C.2 of 3GPP TS 25.212.181. The method of claim wherein the single channel on which jointly encoded HARQ-ACK is transmitted to two or more cells is HS-DPCCH.191. The method of claim wherein the ambiguity arises due to reuse , in the predetermined codebook , of the same codeword to represent two or more ...

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Номер записи: 97
13-03-2014 дата публикации

Receiving Circuit, Use, and Method for Receiving an Encoded and Modulated Radio Signal

Номер: US20140072082A1
Автор: Ulrich Grosskinsky
Принадлежит: Individual

A receiving circuit, use, and method for receiving an encoded and modulated radio signal is provided. The circuit comprise a demodulator and a digital filter connected downstream of the demodulator for moving averaging. The filter has at least two FIFO registers and subtractors. Whereby for subtracting an output value of the FIFO register from an input value of the FIFO register a subtractor is connected to each FIFO register. Wherein the filter has a weighting unit, which is connected downstream of each FIFO register, and wherein the filter has an integrator, which is connected downstream of the subtractors for integration.

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Номер записи: 98
20-03-2014 дата публикации

System and Method for Decoding a Radio Signal

Номер: US20140079158A1
Автор: Wollesen Victor, Yao Yi
Принадлежит: Per Vices Corporation

A method of decoding a radio signal by an electronic device is provided. The method includes receiving the radio signal, digitizing the radio signal, auto-correlating the radio signal to generate a first signal and determining periodic information of the radio signal using the first signal. An electronic device, such as a software defined radio, is also provided. The electronic device includes a radio frequency front end, a processing unit and memory. The processing unit may also include a field programmable gate array and a graphics processing unit. 1. A method of decoding a radio signal by an electronic device comprising:receiving the radio signal;digitizing the radio signal;auto-correlating the radio signal to generate a first signal; anddetermining periodic information of the radio signal using the first signal.2. The method of wherein determining periodic information of the radio signal using the first signal comprises identifying one or more peaks in the first signal.3. The method of wherein determining periodic information of the radio signal using the first signal comprises:applying a Fourier Transform to the first signal to generate a second signal; andidentifying one or more peaks in the second signal.4. The method of wherein determining periodic information of the radio signal using the first signal comprises:applying a filter to the first signal to generate a third signal;applying a Fourier Transform to the third signal to generate a fourth signal; andidentifying one or more peaks in the fourth signal.5. The method of further comprising generating a confidence parameter in the periodic information determined by the electronic device.6. The method of wherein the confidence parameter comprises statistical information of one or more peaks.7. The method of wherein the confidence parameter comprises a width of a peak.8. The method of wherein the radio signal comprises an emanation signal from a computer monitor.9. The method of wherein the periodic ...

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Номер записи: 99
20-03-2014 дата публикации

PHASOR-BASED PULSE DETECTION

Номер: US20140079159A1
Автор: Johnson James A.
Принадлежит: LOCKHEED MARTIN CORPORATION

A phasor-based pulse detection system includes a first multiplier stage configured to apply a first delayed conjugate multiplication operation to an input signal. The system can also include a second multiplier stage coupled to the first multiplier stage and configured to apply a second delayed conjugate multiplication operation to an output of the first multiplier stage, and an absolute value unit coupled to the second multiplier stage and configured to perform an absolute value operation on an output of the second multiplier stage. The system can further include video filter stage coupled to the absolute value unit and configured to perform a video filtering operation on an output of the absolute value unit. The system can also include a hysteresis detector coupled to the video filter stage, the hysteresis detector configured for detecting a signal in a filtered video signal received from the video filter stage, the detecting including determining a signal start when the filtered video signal exceeds a predetermined detection threshold for a first predetermined number of consecutive samples, and determining a signal end when the filtered video signal falls below a predetermined rejection threshold for a second predetermined number of consecutive samples. 119-. (canceled)20. A phasor-based signal detection system comprising:a multiplier section, configured to apply one or more delayed conjugate multiplication operations to an input signal;an absolute value unit coupled to the multiplier section and configured to perform an absolute value operation on an output of the multiplier section;anda hysteresis detector configured for detecting presence of a signal, the detecting including determining a signal start when a signal received at the hysteresis detector exceeds a predetermined detection threshold for a first predetermined number of consecutive samples, and determining a signal end when the signal received at the hysteresis detector falls below a predetermined ...

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Номер записи: 100