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公开(公告)号：KR20120082942A
公开(公告)日：2012-07-24
申请号：KR20127014772
申请日：2009-05-13
Applicant: QUALCOMM INC
Inventor： SIKRI DIVAYDEEP , ABRISHAMKAR FARROKH , YAN MING , DE LAURENTIIS NICO
Abstract: 무선 시스템에서의 타이밍 및 주파수 동기를 위한 방법이 제공된다. 상기 방법은 심볼의 버스트를 수신하는 단계, 상기 심볼의 버스트의 서브셋을 선택하는 단계, 복수의 타이밍 오프셋에 의해 상기 심볼의 버스트의 서브셋을 반복적으로 조정하는 단계 및 상기 타이밍 오프셋 각각에 대하여, 상기 조정된 서브셋에 대응하는 제 1 성능 메트릭을 계산하는 단계를 포함한다. 또한, 상기 방법은 상기 제 1 성능 메트릭에 기초하여 바람직한 타이밍 오프셋이 되도록 상기 복수의 타이밍 오프셋 중 하나의 타이밍 오프셋을 결정하는 단계, 복수의 주파수 오프셋에 의해 상기 심볼의 버스트의 서브셋을 반복적으로 회전시키는 단계 및 상기 주파수 오프셋 각각에 대하여, 상기 회전된 서브셋에 대응하는 제 2 성능 메트릭을 계산하는 단계, 및 상기 제 2 성능 메트릭에 기초하여 바람직한 주파수 오프셋이 되도록 상기 복수의 주파수 오프셋 중 하나의 주파수 오프셋을 결정하는 단계를 포함한다.
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公开(公告)号：JP2013141259A
公开(公告)日：2013-07-18
申请号：JP2013011991
申请日：2013-01-25
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： DIVAYDEEP SIKRI , ABRISHAMKAR FARROKH , MICHAEL L MCCLOUD
IPC: H04B1/10
CPC classification number: H04W56/00
Abstract: PROBLEM TO BE SOLVED: To provide a method for suppressing interference in wireless communication.SOLUTION: The method comprises: receiving a burst of symbols; generating a plurality of timing hypotheses for the burst of symbols; and calculating, for each timing hypothesis, a plurality of weights for an interference suppression filter based upon a subset of the burst of symbols. The method further comprises, for each timing hypothesis: filtering the subset of the burst of symbols using the interference suppression filter with the corresponding plurality of weights; and selecting one of the plurality of timing hypotheses corresponding to a selection criteria. The method further comprises equalizing and decoding the filtered burst of symbols on the basis of the selected one of the plurality of timing hypotheses.
Abstract translation: 要解决的问题：提供一种用于抑制无线通信中的干扰的方法。解决方案：该方法包括：接收符号突发; 为符号突发生成多个定时假设; 以及基于所述符号突发的子集，针对每个时序假设计算用于干扰抑制滤波器的多个权重。 该方法还包括：对于每个定时假设：使用具有相应的多个权重的干扰抑制滤波器来过滤符号突发的子集; 以及选择与选择标准相对应的多个定时假设之一。 该方法还包括基于所选择的多个定时假设之一来均衡和解码经过滤波的符号突发。
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3.发明专利Decision feedback equalizer with combined cck encoding-decoding in feedback filtering 有权具有组合CCK编码解码的反馈反馈的反馈反馈均衡器
公开(公告)号：JP2011045095A
公开(公告)日：2011-03-03
申请号：JP2010204489
申请日：2010-09-13
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： ABRISHAMKAR FARROKH , SMEE JOHN E , GLAZKO SERGUEI
CPC classification number: H04L23/02 , H04L25/03057 , H04L2025/03375 , H04L2025/0349 , H04L2025/03611
Abstract: PROBLEM TO BE SOLVED: To perform complementary code keying (CCK) encoding of symbols in data supplied to a decision feedback equalizer to reduce decision errors in the decision feedback equalizer. SOLUTION: A decision feedback equalizer includes a chip estimate buffer that forms chip estimates into a vector. A CCK decoder decodes the vector of chip estimates, and a CCK encoder, connected with the CCK decoder, re-encodes the vector of chip estimates into a valid CCK code word. At the same time, a chip slicer provides direct sliced chips from the chip estimates. An update module then forms a hybrid vector from the valid CCK code-word and the direct sliced chips for input to a feedback filter of the decision feedback equalizer. The hybrid feedback filter input vector reflects the CCK coding gain of its re-encoded portion thereby reducing the estimated chip error rate to improve the performance of the decision feedback equalizer. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation: 要解决的问题：对提供给判决反馈均衡器的数据中的符号进行补码编码（CCK）编码以减少判决反馈均衡器中的判定误差。 解决方案：判决反馈均衡器包括将码片估计形成向量的码片估计缓冲器。 CCK解码器解码芯片估计的向量，并且与CCK解码器连接的CCK编码器将芯片估计的向量重新编码为有效的CCK码字。 同时，芯片切片机从芯片估计提供直接切片芯片。 然后，更新模块从有效的CCK码字和直接切片的芯片形成混合矢量，用于输入到判决反馈均衡器的反馈滤波器。 混合反馈滤波器输入矢量反映其重新编码部分的CCK编码增益，从而降低估计的芯片误码率，以提高判决反馈均衡器的性能。 版权所有（C）2011，JPO＆INPIT
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公开(公告)号：JP2013070384A
公开(公告)日：2013-04-18
申请号：JP2012238170
申请日：2012-10-29
Applicant: Qualcomm Inc , クゥアルコム・インコーポレイテッドQualcomm Incorporated
Inventor： DIVAYDEEP SIKRI , ABRISHAMKAR FARROKH , YANG MIN , NICO DE LAURENTIIS
Abstract: PROBLEM TO BE SOLVED: To provide a method for timing and frequency synchronization in a wireless system.SOLUTION: The method comprises the steps of receiving a burst of symbols, selecting a subset of the burst of symbols, iteratively adjusting the subset of the burst of symbols by a plurality of timing offsets, and calculating a first performance metric. The method further comprises the steps of determining one of the plurality of timing offsets on the basis of the first performance metric thereof, iteratively rotating the subset of the burst of symbols by a plurality of frequency offsets, calculating, for each frequency offset, a second performance metric corresponding to the rotated subset, and determining one of the plurality of frequency offsets on the basis of the second performance metric thereof.
Abstract translation: 要解决的问题：提供一种无线系统中的定时和频率同步的方法。 解决方案：该方法包括以下步骤：接收符号脉冲串，选择符号脉冲串的子集，通过多个定时偏移迭代地调整符号脉冲串的子集，以及计算第一性能度量。 该方法还包括以下步骤：基于其第一性能度量来确定多个定时偏移中的一个，迭代地使符号突发的子集反复旋转多个频率偏移，对于每个频率偏移量，计算第二 性能度量，并且基于其第二性能度量来确定多个频率偏移中的一个。 版权所有（C）2013，JPO＆INPIT
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公开(公告)号：AT547877T
公开(公告)日：2012-03-15
申请号：AT09791549
申请日：2009-08-15
Applicant: QUALCOMM INC
Inventor： SIKRI DIVAYDEEP , ABRISHAMKAR FARROKH , MCCLOUD MICHAEL L
Abstract: A method for suppressing interference in a wireless communication is provided. The method comprises receiving a burst of symbols, generating a plurality of timing hypotheses for the burst of symbols, and calculating, for each timing hypothesis, a plurality of weights for an interference suppression filter based upon a subset of the burst of symbols. The method further comprises, for each timing hypothesis, filtering the subset of the burst of symbols using the interference suppression filter with the corresponding plurality of weights, and selecting one of the plurality of timing hypotheses corresponding to a selection criteria. The method further comprises equalizing and decoding the filtered burst of symbols based upon the selected one of the plurality of timing hypotheses.
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Patent Agency Ranking
公开(公告)号：BR0206878A
公开(公告)日：2005-01-18
申请号：BR0206878
申请日：2002-01-31
Applicant: QUALCOMM INC
Inventor： WILBORN THOMAS BRIAN , PATEL SHIMMAN , SIH GILBERT C , ABRISHAMKAR FARROKH
Abstract: A velocity estimate is determined from a received signal by counting the number of times a signal in one multipath crosses a predetermined threshold in a given amount of time. A signal is received and a single multipath is extracted from the received signal. Instantaneous envelope values of the extracted multipath are calculated. A plurality of the instantaneous envelope values are used to calculate a running RMS value. A level crossing threshold is determined using the running RMS value. The number of times the instantaneous envelope value crosses the level crossing threshold is counted. The number of level crossings is mapped to a velocity estimate.
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公开(公告)号：AU2003245409A1
公开(公告)日：2003-12-22
申请号：AU2003245409
申请日：2003-06-05
Applicant: QUALCOMM INC
Inventor： ABRISHAMKAR FARROKH , BUTLER BRIAN K , LIN YU-CHUAN G
IPC: H04B1/707
Abstract: A system is disclosed for use in a wireless communication system to provide an estimated pilot signal. The system includes a receiver and a front-end processing and despreading component in electronic communication with the receiver for despreading a CDMA signal. A pilot estimation component is in electronic communication with the front-end processing and despreading component for estimating an original pilot signal using a Wiener filter to produce a pilot estimate. A demodulation component is in electronic communication with the pilot estimation component and the front-end processing and despreading component for providing demodulated data symbols. The Wiener filter is configured by an offline filter determination process that calculates parameters of the Wiener filter to minimize the mean-square error.
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公开(公告)号：ES2465220T3
公开(公告)日：2014-06-05
申请号：ES11009956
申请日：2007-11-14
Applicant: QUALCOMM INC
Inventor： SHIM BYONGHYO , KANG INYUP , ABRISHAMKAR FARROKH , SAMBHWANI SHARAD DEEPAK
Abstract: Un procedimiento en un sistema de comunicaciones de acceso múltiple inalámbrico que comprende: realizar detección (814) de datos en una señal recibida para obtener una señal detectada para un primer conjunto de canales de codificación para un sector de célula; reconstruir una señal (816) para el primer conjunto de canales de codificación basándose en la señal detectada; cancelar (818) la señal reconstruida para el primer conjunto de canales de codificación a partir de la señal recibida; y realizar detección (814) de datos, reconstrucción (816) y cancelación (818) para al menos un conjunto adicional de canales de código para otro sector de célula.
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公开(公告)号：MY134027A
公开(公告)日：2007-11-30
申请号：MYPI20021277
申请日：2002-04-09
Applicant: QUALCOMM INC
Inventor： LEE WAY-SHING , GLAZKO SERGUEI , CHALLA RAGHU , FEVRIER IAN , SIH GIL , ABRISHAMKAR FARROKH , PATRICK CHRISTOPHER
Abstract: [0072] A SPREAD SPECTRUM WIRELESS DEVICE (100) MAY INCLUDE A RECEIVER (110), A SEARCHER (128), A SEARCH CONTROLLER (130) AND OTHER FEATURES. THE SEARCH CONTROLLER (130) SELECTIVELY GENERATES CONTROL SIGNALS TO CONTROL THE SEARCHER (128) , WHICH SEARCHES FOR A SPREAD-SPECTRUM SIGNAL. IN ONE EMBODIMENT, THE ARCHITECTURE OF THE SEARCHER (128) IS DYNAMICALLY CONFIGURABLE BY THE SEARCH CONTROLLER (130) TO SELECTIVELY SEARCH MULTIPLE CHANNELS USING MULTIPLE FREQUENCY BINS FOR THE SIGNAL.(FIG 1)
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公开(公告)号：BR0308331A
公开(公告)日：2005-04-05
申请号：BR0308331
申请日：2003-03-12
Applicant: QUALCOMM INC
Inventor： SIH GILBERT CHRISTOPHER , ABRISHAMKAR FARROKH , RICK ROLAND
IPC: H04B1/707
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