BRPI0507457A - estimativa de canal para um sistema de comunicação sem fio com múltiplos fluxos paralelos de dados - Google Patents

estimativa de canal para um sistema de comunicação sem fio com múltiplos fluxos paralelos de dados

Info

Publication number
BRPI0507457A
BRPI0507457A BRPI0507457-6A BRPI0507457A BRPI0507457A BR PI0507457 A BRPI0507457 A BR PI0507457A BR PI0507457 A BRPI0507457 A BR PI0507457A BR PI0507457 A BRPI0507457 A BR PI0507457A
Authority
BR
Brazil
Prior art keywords
symbols
channel estimate
data stream
communication system
decoded
Prior art date
Application number
BRPI0507457-6A
Other languages
English (en)
Inventor
Ashok Mantravadi
Aamod Khandekar
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of BRPI0507457A publication Critical patent/BRPI0507457A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/022—Channel estimation of frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/0026—Interference mitigation or co-ordination of multi-user interference
    • H04J11/0036—Interference mitigation or co-ordination of multi-user interference at the receiver
    • H04J11/004—Interference mitigation or co-ordination of multi-user interference at the receiver using regenerative subtractive interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/3488—Multiresolution systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0093—Point-to-multipoint

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

ESTIMATIVA DE CANAL PARA UM SISTEMA DE COMUNICAçãO SEM FIO COM MúLTIPLOS FLUXOS DE DADOS PARALELOS Para recuperar múltiplos fluxos de dados transmitidos simultaneamente, é derivada uma primeira estimativa de canal para um canal sem fio com base em símbolos piloto recebidos. A detecção é efetuada sobre símbolos de dados recebidos utilizando-se a primeira estimativa de canal para obter símbolos detectados para um primeiro fluxo de dados. Tais símbolos detectados são decodificados para obtenção de um primeiro fluxo de dados decodificado, o qual é codificado novamente para obtenção de símbolos modulados novamente. Uma segunda estimativa de canal éderivada com base nos símbolos modulados novamente. As primeira e segunda estimativas de canal são combinadas para obtenção de uma terceira estimativa de canal possuindo maior qualidade. A interferência devido ao primeiro fluxo de dados é estimada usando-se a terceira estimativa de canal e cancelada dos símbolos de dados recebidos. A detecção é efetuada sobre símbolos com interferência cancelada usando-se a terceira estimativa de canal para obtenção de símbolos detectados para um segundo fluxo de dados. Tais símbolos detectados são adicionalmente decodificados para obtenção de um segundo fluxo de dados decodificado.
BRPI0507457-6A 2004-02-05 2005-01-31 estimativa de canal para um sistema de comunicação sem fio com múltiplos fluxos paralelos de dados BRPI0507457A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/773,646 US7701917B2 (en) 2004-02-05 2004-02-05 Channel estimation for a wireless communication system with multiple parallel data streams
PCT/US2005/003156 WO2005079031A2 (en) 2004-02-05 2005-01-31 Channel estimation for a wireless communication system with multiple parallel data streams

Publications (1)

Publication Number Publication Date
BRPI0507457A true BRPI0507457A (pt) 2007-07-03

Family

ID=34826811

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0507457-6A BRPI0507457A (pt) 2004-02-05 2005-01-31 estimativa de canal para um sistema de comunicação sem fio com múltiplos fluxos paralelos de dados

Country Status (13)

Country Link
US (2) US7701917B2 (pt)
EP (1) EP1719312A2 (pt)
JP (1) JP4602995B2 (pt)
KR (1) KR100893517B1 (pt)
CN (1) CN1939018B (pt)
AR (1) AR047592A1 (pt)
AU (1) AU2005213126C1 (pt)
BR (1) BRPI0507457A (pt)
CA (1) CA2555397A1 (pt)
IL (1) IL177294A0 (pt)
RU (1) RU2332801C2 (pt)
TW (1) TW200601755A (pt)
WO (1) WO2005079031A2 (pt)

Families Citing this family (124)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6396819B1 (en) 1998-03-21 2002-05-28 Richard D. Fleeter Low-cost satellite communication system
US7227884B2 (en) 2000-02-28 2007-06-05 Aeroastro, Inc. Spread-spectrum receiver with progressive fourier transform
US7505426B2 (en) * 2000-12-29 2009-03-17 Tropos Networks Multi-channel mesh network
US7363039B2 (en) 2002-08-08 2008-04-22 Qualcomm Incorporated Method of creating and utilizing diversity in multiple carrier communication system
US6961595B2 (en) 2002-08-08 2005-11-01 Flarion Technologies, Inc. Methods and apparatus for operating mobile nodes in multiple states
US8190163B2 (en) 2002-08-08 2012-05-29 Qualcomm Incorporated Methods and apparatus of enhanced coding in multi-user communication systems
JP4718442B2 (ja) 2003-02-19 2011-07-06 クゥアルコム・インコーポレイテッド マルチユーザ通信システムにおける制御重畳コーディング
US8593932B2 (en) * 2003-05-16 2013-11-26 Qualcomm Incorporated Efficient signal transmission methods and apparatus using a shared transmission resource
US7925291B2 (en) 2003-08-13 2011-04-12 Qualcomm Incorporated User specific downlink power control channel Q-bit
US7701917B2 (en) * 2004-02-05 2010-04-20 Qualcomm Incorporated Channel estimation for a wireless communication system with multiple parallel data streams
US7830976B2 (en) * 2004-07-16 2010-11-09 Qualcomm Incorporated Iterative channel and interference estimation with dedicated pilot tones for OFDMA
TWI256219B (en) * 2004-08-09 2006-06-01 Realtek Semiconductor Corp Interference alleviation equalizer of multi-carrier communication system and method thereof
US8270512B2 (en) * 2004-08-12 2012-09-18 Interdigital Technology Corporation Method and apparatus for subcarrier and antenna selection in MIMO-OFDM system
US7672383B2 (en) * 2004-09-17 2010-03-02 Qualcomm Incorporated Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling
WO2006096678A1 (en) * 2005-03-08 2006-09-14 Qualcomm Flarion Technologies, Inc. Transmission methods and apparatus combining pulse modulation and hierarchical modulation
US8428001B2 (en) * 2005-03-10 2013-04-23 Qualcomm Incorporated Timing corrections in a multi carrier system and propagation to a channel estimation time filter
US20060224763A1 (en) * 2005-03-18 2006-10-05 Sharp Laboratories Of America, Inc. Switching and simultaneous usage of 802.11a and 802.11g technologies for video streaming
US7953039B2 (en) 2005-04-21 2011-05-31 Samsung Elecronics Co., Ltd. System and method for channel estimation in a delay diversity wireless communication system
US7583755B2 (en) * 2005-08-12 2009-09-01 Ati Technologies, Inc. Systems, methods, and apparatus for mitigation of nonlinear distortion
US7739926B2 (en) * 2005-10-24 2010-06-22 Camfil Farr, Inc. Method and apparatus for v-bank filter bed scanning
WO2007136415A2 (en) * 2005-12-30 2007-11-29 Comtech Mobile Datacom Corporation Mobile satellite communications
US7817735B2 (en) 2006-01-11 2010-10-19 Amicus Wireless Technology Ltd. Device and method of performing channel estimation for OFDM-based wireless communication system
US7817533B2 (en) * 2006-01-11 2010-10-19 Amicus Wireless Technology Ltd. Device and method for performing channel estimation for OFDM-based signals with variable pilot subcarrier spacing
US7808886B2 (en) 2006-01-18 2010-10-05 Freescale Semiconductor, Inc. Pilot signal in an FDMA communication system
WO2007103183A2 (en) * 2006-03-01 2007-09-13 Interdigital Technology Corporation Method and apparatus for channel estimation in an orthogonal frequency division multiplexing system
US20070211669A1 (en) * 2006-03-07 2007-09-13 Bhupesh Manoharlal Umatt Method and apparatus for searching radio technologies
KR101172917B1 (ko) 2006-03-17 2012-08-10 삼성전자주식회사 무선 통신 시스템에서 간섭 신호 제거 장치 및 방법
US9130791B2 (en) * 2006-03-20 2015-09-08 Qualcomm Incorporated Uplink channel estimation using a signaling channel
ES2395547T3 (es) * 2006-03-20 2013-02-13 Qualcomm Incorporated Estimación del canal ascendente utilizando un canal de señalización
EP2002622A1 (en) * 2006-04-03 2008-12-17 National ICT Australia Limited Channel estimation for rapid dispersive fading channels
AU2007252224B2 (en) * 2006-05-24 2011-10-06 Cohda Wireless Pty Ltd Method and apparatus for multicarrier communications
JP4881948B2 (ja) * 2006-06-23 2012-02-22 パナソニック株式会社 無線送信装置、無線受信装置、およびデータ生成方法
US8116242B2 (en) * 2006-07-18 2012-02-14 Motorola Mobility, Inc. Receiver having multi-antenna log likelihood ratio generation with channel estimation error
CN101940024A (zh) * 2006-08-08 2011-01-05 北电网络有限公司 多种操作环境中的无线通信方法和系统
US7689188B2 (en) * 2006-09-29 2010-03-30 Broadcom Corporation Method and system for dynamically tuning and calibrating an antenna using antenna hopping
US8396044B2 (en) * 2006-09-29 2013-03-12 Broadcom Corporation Method and system for antenna architecture for WCDMA/HSDPA/HSUDPA diversity and enhanced GSM/GPRS/edge performance
US8116259B2 (en) * 2006-09-29 2012-02-14 Broadcom Corporation Method and system for diversity processing based on antenna switching
US8396151B2 (en) * 2006-10-19 2013-03-12 Qualcomm Incorporated Timing tracking in a multiple receive antenna system
US8031786B2 (en) * 2006-10-25 2011-10-04 Cisco Technology, Inc. Method and system for improving channel estimation in a communications network
JP4819651B2 (ja) * 2006-11-02 2011-11-24 株式会社日立国際電気 Ｏｆｄｍ信号の伝送路特性推定手段と補正手段及びそれを用いた装置
CA2819717A1 (en) * 2006-11-06 2008-05-15 Qualcomm Incorporated Mimo transmission with layer permutation in a wireless communication system
BRPI0717950A2 (pt) * 2006-11-06 2013-11-05 Qualcomm Inc Detecção mimo com cancelamento de interferência de componentes de sinal em tempo real
US8275080B2 (en) * 2006-11-17 2012-09-25 Comtech Mobile Datacom Corporation Self-supporting simplex packets
KR100864823B1 (ko) 2006-12-01 2008-10-23 한국전자통신연구원 파일럿을 이용한 계층 변조 장치 및 방법, 계층 변조된신호를 수신하는 장치 및 그 방법
US8130875B2 (en) * 2006-12-11 2012-03-06 Cisco Technology, Inc. Method for estimating channel response in a wireless communications network based on pilot signals
HUE051741T2 (hu) 2007-01-11 2021-03-29 Qualcomm Inc DTX és DRX használata vezeték nélküli kommunikációs rendszerben
KR20080069495A (ko) * 2007-01-23 2008-07-28 한국전자통신연구원 파일럿의 삽입 및 파일럿의 특정 배치 패턴을 통하여ｏｆｄｍ 전송 시스템의 전송성능을 높이는 계층 변조 장치및 계층 변조 신호 송수신 장치 및 그 방법
US8594137B2 (en) * 2007-02-20 2013-11-26 Teradici Corporation Apparatus and methods for image decoding
KR101343407B1 (ko) * 2007-02-26 2013-12-20 삼성전자주식회사 부가 데이터 전송이 가능한 디지털 송신 시스템 및 그 방법
US20080219332A1 (en) * 2007-03-05 2008-09-11 Qualcomm Incorporated Apparatus and methods accounting for automatic gain control in a multi carrier system
US8098567B2 (en) * 2007-03-05 2012-01-17 Qualcomm Incorporated Timing adjustments for channel estimation in a multi carrier system
SG179491A1 (en) 2007-03-15 2012-04-27 Interdigital Tech Corp Method and apparatus for feedback overhead reduction in wireless communications
FR2915840B1 (fr) * 2007-05-04 2009-07-24 Eads Secure Networks Soc Par A Decodage de symboles d'un signal repartis suivant des dimensions frequentielle et temporelle
US9521680B2 (en) * 2007-07-10 2016-12-13 Qualcomm Incorporated Methods and apparatus for successive interference cancellation based on three rate reports from interfering device in peer-to-peer networks
US8849197B2 (en) * 2007-07-10 2014-09-30 Qualcomm Incorporated Methods and apparatus for active successive interference cancellation in peer-to-peer networks
US9668225B2 (en) * 2007-07-10 2017-05-30 Qualcomm Incorporated Methods and apparatus for active successive interference cancellation based on one rate feedback and probability adaptation in peer-to-peer networks
US8874040B2 (en) * 2007-07-10 2014-10-28 Qualcomm Incorporated Methods and apparatus for successive interference cancellation based on rate capping in peer-to-peer networks
US8433349B2 (en) * 2007-07-10 2013-04-30 Qualcomm Incorporated Methods and apparatus for successive interference cancellation based on transmit power control by interfering device with success probability adaptation in peer-to-peer wireless networks
US8855567B2 (en) * 2007-07-10 2014-10-07 Qualcomm Incorporated Methods and apparatus for successive interference cancellation based on two rate feedback in peer-to-peer networks
US8145272B2 (en) * 2007-08-08 2012-03-27 Cisco Technology, Inc. Pilot-based two-dimensional channel estimation
US8462867B2 (en) 2007-08-31 2013-06-11 Qualcomm Incorporated Near soft-output maximum-likelihood detection for multiple-input multiple-output systems
US8010070B2 (en) * 2007-10-09 2011-08-30 Maxlinear, Inc. Low-complexity diversity using coarse FFT and subband-wise combining
US8472912B2 (en) 2009-12-11 2013-06-25 Maxlinear, Inc. Low-complexity diversity using preequalization
JP5579070B2 (ja) * 2007-11-01 2014-08-27 アルカテル−ルーセント 無線アクセスネットワークにおいて音声／映像コンテンツを送信／受信するための方法及び装置
KR100941107B1 (ko) * 2007-11-20 2010-02-10 한국과학기술원 직교주파수분할다중화 시스템에서의 채널추정방법 및 채널추정장치
FI20075864A0 (fi) * 2007-11-30 2007-11-30 Nokia Corp Laite, tietokoneohjelma ja menetelmä
US8774332B2 (en) * 2007-12-21 2014-07-08 Broadcom Corporation Characterizing channel response based on composite gain determination
GB2456874A (en) * 2008-01-30 2009-08-05 Nokia Corp Method and apparatus for detecting a data stream based on an estimated data stream and an estimated interference.
EP2109273B1 (en) * 2008-04-11 2010-11-03 Telefonaktiebolaget LM Ericsson (publ) Methods and arrangements for estimating IQ-imbalance
ES2540916T3 (es) * 2008-05-09 2015-07-14 Vodafone Holding Gmbh Procedimiento y sistema de comunicación de datos
US7970070B2 (en) * 2008-05-14 2011-06-28 Newport Media, Inc. Adaptive frequency domain equalization in OFDM based communication system
US8731109B2 (en) 2008-05-19 2014-05-20 Qualcomm Incorporated Methods and systems for effective channel estimation in OFDM systems
KR100936245B1 (ko) * 2008-05-23 2010-01-11 전자부품연구원 시변 채널 시공간 블록 부호 데이터 검출 장치 및 방법
US8737497B2 (en) * 2008-10-06 2014-05-27 Ceragon Networks Ltd. Estimating interference in multi channel systems
US9148311B2 (en) 2008-10-15 2015-09-29 Stmicroelectronics, Inc. Determining responses of rapidly varying MIMO-OFDM communication channels using observation scalars
US9130789B2 (en) 2008-10-15 2015-09-08 Stmicroelectronics Asia Pacific Pte. Ltd. Recovering data from a secondary one of simultaneous signals, such as orthogonal-frequency-division-multiplexed (OFDM) signals, that include a same frequency
US9240908B2 (en) * 2008-10-15 2016-01-19 Stmicroelectronics, Inc. Pilot pattern for observation scalar MIMO-OFDM
US9338033B2 (en) 2008-10-15 2016-05-10 Stmicroelectronics, Inc. Recovering data from a primary one of simultaneous signals, such as orthogonal-frequency-division-multiplexed (OFDM) signals, that include a same frequency
US9083573B2 (en) 2008-10-15 2015-07-14 Stmicroelectronics Asia Pacific Pte. Ltd. Simultaneous transmission of signals, such as orthogonal-frequency-division-multiplexed (OFDM) signals, that include a same frequency
US9020050B2 (en) * 2008-10-15 2015-04-28 Stmicroelectronics, Inc. Accounting for inter-carrier interference in determining a response of an OFDM communication channel
US8718208B2 (en) * 2008-10-15 2014-05-06 Stmicroelectronics, Inc. Recovery of data from a multi carrier signal
US9130788B2 (en) 2008-10-15 2015-09-08 Stmicroelectronics, Inc. Determining a response of a rapidly varying OFDM communication channel using an observation scalar
US9137054B2 (en) 2008-10-15 2015-09-15 Stmicroelectronics, Inc. Pilot pattern for MIMO OFDM
US9596106B2 (en) 2008-10-15 2017-03-14 Stmicroelectronics, Inc. Pilot pattern for observation-scalar MIMO-OFDM
US8787177B2 (en) * 2008-11-03 2014-07-22 Apple Inc. Techniques for radio link problem and recovery detection in a wireless communication system
US9106364B1 (en) 2009-01-26 2015-08-11 Comtech Mobile Datacom Corporation Signal processing of a high capacity waveform
US8548107B1 (en) * 2009-01-26 2013-10-01 Comtech Mobile Datacom Corporation Advanced multi-user detector
US9762414B2 (en) * 2009-02-04 2017-09-12 Acorn Technologies, Inc. Least squares channel identification for OFDM Systems
JP2010278722A (ja) * 2009-05-28 2010-12-09 Sharp Corp 受信装置、受信方法、通信システムおよび通信方法
US20100311343A1 (en) * 2009-06-07 2010-12-09 Arvind Vijay Keerthi Hierarchical modulation for accurate channel sounding
KR101130659B1 (ko) * 2009-08-25 2012-04-02 전자부품연구원 Ｏｆｄｍ 신호 동기화 장치 및 방법
US8675711B1 (en) 2009-09-25 2014-03-18 Comtech Mobile Datacom Corporation System and methods for dynamic spread spectrum usage
US8675751B2 (en) * 2010-04-08 2014-03-18 Comtech Ef Data Corp. Meta-carrier embedding technique with improved performance for BPSK, MSK, and O-QPSK modulation
US8781016B2 (en) 2010-04-12 2014-07-15 Qualcomm Incorporated Channel estimation for low-overhead communication in a network
JP5641816B2 (ja) * 2010-08-20 2014-12-17 シャープ株式会社 受信装置及び受信方法
US9112535B2 (en) * 2010-10-06 2015-08-18 Cleversafe, Inc. Data transmission utilizing partitioning and dispersed storage error encoding
US9991847B2 (en) 2010-12-23 2018-06-05 Maxlinear, Inc. Method and apparatus for broadband data conversion
US20120182473A1 (en) * 2011-01-14 2012-07-19 Gyudong Kim Mechanism for clock recovery for streaming content being communicated over a packetized communication network
US8929493B2 (en) * 2011-02-01 2015-01-06 Blackberry Limited Mixed rank downlink compound multi-user interference alignment scheme
US9331765B2 (en) 2011-02-01 2016-05-03 Blackberry Limited Mixed rank downlink multi-user interference alignment scheme
TWI427957B (zh) * 2011-08-23 2014-02-21 Ind Tech Res Inst 一種通道估測方法及裝置
WO2013070651A1 (en) * 2011-11-10 2013-05-16 Marvell World Trade Ltd. Channel estimation with decision feedback
JP2013168853A (ja) * 2012-02-16 2013-08-29 Sharp Corp 受信装置、受信方法および受信プログラム
US8744017B2 (en) * 2012-03-02 2014-06-03 CMMB Vision USA Inc. Demapping for hierarchical Quadrature Amplitude Modulation
US8761317B2 (en) * 2012-04-04 2014-06-24 Telefonaktiebolaget L M Ericsson (Publ) Soft-bit generation and channel estimation for interference cancellation using decoder output
CN102685059B (zh) * 2012-04-26 2015-07-08 重庆重邮信科通信技术有限公司 一种信号接收方法及装置
US8964871B2 (en) 2012-05-14 2015-02-24 Blackberry Limited Codebook based downlink multi-user interference alignment scheme
US9674002B2 (en) * 2012-10-09 2017-06-06 Telefonaktiebolaget Lm Ericsson (Publ) Channel estimation in a multi-antenna wireless communications system
US9350587B1 (en) 2012-11-30 2016-05-24 Marvell International Ltd. System and method for timing error estimation
RU2543469C2 (ru) * 2012-12-20 2015-02-27 Открытое акционерное общество "Головное системное конструкторское бюро Концерна ПВО "Алмаз-Антей" имени академика А.А. Расплетина" (ОАО "ГСКБ "Алмаз-Антей") Устройство для приема информации по двум параллельным каналам связи
US20140341326A1 (en) * 2013-05-20 2014-11-20 Qualcomm Incorporated Channel estimation with discontinuous pilot signals
US9634802B2 (en) * 2013-08-30 2017-04-25 Qualcomm Incorporated Resource mapping to handle bursty interference
WO2015055256A1 (en) * 2013-10-18 2015-04-23 Huawei Technologies Co., Ltd. Transmission and receiving method in a wireless communication system
US9166669B1 (en) * 2014-04-09 2015-10-20 Altiostar Networks, Inc. Sparse ordered iterative group decision feedback interference cancellation
US9306678B2 (en) * 2014-04-24 2016-04-05 Comcast Cable Communications, Llc Data interpretation with noise signal analysis
KR101909037B1 (ko) * 2014-07-15 2018-10-17 엘지전자 주식회사 Mimo 수신기가 re 그룹 단위로 복수의 레이어를 정렬하여 수신 신호를 처리하는 방법
US9413563B2 (en) * 2014-12-09 2016-08-09 Mbit Wireless, Inc. Method and apparatus for channel estimation using localized SINR in wireless communication systems
CA3065394C (en) * 2015-03-06 2022-05-17 Electronics And Telecommunications Research Institute Broadcast signal frame generating apparatus and broadcast signal frame generating method using bootstrap and preamble
US10182439B2 (en) * 2016-02-16 2019-01-15 Samsung Electronics Co., Ltd Method and apparatus for data-aided iterative channel estimation
US9524628B1 (en) * 2016-08-04 2016-12-20 Cognitive Systems Corp. Detecting signal modulation for motion detection
US10484210B2 (en) * 2017-03-29 2019-11-19 Alcatel Lucent Successive interference cancellation and multi-user minimum mean square channel estimation based on soft decoding information
US11115239B2 (en) 2017-12-01 2021-09-07 Huawei Technologies Co., Ltd. Preamble structure supporting full duplex communications
US10687186B1 (en) * 2019-09-09 2020-06-16 GM Global Technology Operations LLC System and method for decoding overlapping wireless frames
US20230336275A1 (en) * 2022-04-15 2023-10-19 Nokia Solutions And Networks Oy Hierarchical deep channel coding

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3145003B2 (ja) * 1995-03-23 2001-03-12 株式会社東芝 直交周波数分割多重伝送方式とその送信装置および受信装置
US5995567A (en) 1996-04-19 1999-11-30 Texas Instruments Incorporated Radio frequency noise canceller
FI962140A (fi) * 1996-05-21 1997-11-22 Nokia Telecommunications Oy Menetelmä impulssivasteen estimoimiseksi sekä vastaanotin
US6067292A (en) * 1996-08-20 2000-05-23 Lucent Technologies Inc Pilot interference cancellation for a coherent wireless code division multiple access receiver
DE69720225D1 (de) * 1996-09-02 2003-04-30 St Microelectronics Nv Verbesserungen bei, oder in bezug auf mehrträgerübertragungssysteme
DE19850279B4 (de) * 1998-10-30 2005-12-22 Robert Bosch Gmbh Verfahren für die Übertragung von Signalen zwischen einer ersten Funkstation und einer zweiten Funkstation und Funkstation
JP2001352311A (ja) 2000-06-07 2001-12-21 Mitsubishi Electric Corp 検波方法およびマルチキャリア受信装置
JP3735015B2 (ja) 2000-07-26 2006-01-11 松下電器産業株式会社 回線推定装置および回線推定方法
WO2002039686A1 (fr) * 2000-11-09 2002-05-16 Linkair Communications, Inc. Procede d'evaluation d'un canal et appareil associe
US7190734B2 (en) * 2001-05-25 2007-03-13 Regents Of The University Of Minnesota Space-time coded transmissions within a wireless communication network
JP3605638B2 (ja) * 2001-10-30 2004-12-22 独立行政法人情報通信研究機構 デジタル変調信号の等化方法とそれを用いた復調器
JP3926641B2 (ja) * 2002-02-13 2007-06-06 株式会社エヌ・ティ・ティ・ドコモ 多入力多出力ターボ受信機
JP2003304176A (ja) 2002-04-08 2003-10-24 Matsushita Electric Ind Co Ltd 通信システム、受信装置及び受信方法
US7418026B2 (en) 2002-05-09 2008-08-26 Sony United Kingdom Limited Receiver for a multi-carrier modulated symbol
US20040121730A1 (en) 2002-10-16 2004-06-24 Tamer Kadous Transmission scheme for multi-carrier MIMO systems
US7215713B2 (en) * 2003-11-26 2007-05-08 Delphi Technologies, Inc. Method to minimize compatibility error in hierarchical modulation
US7701917B2 (en) * 2004-02-05 2010-04-20 Qualcomm Incorporated Channel estimation for a wireless communication system with multiple parallel data streams

Also Published As

Publication number Publication date
EP1719312A2 (en) 2006-11-08
AU2005213126A1 (en) 2005-08-25
RU2006131700A (ru) 2008-03-10
RU2332801C2 (ru) 2008-08-27
IL177294A0 (en) 2006-12-10
TW200601755A (en) 2006-01-01
AU2005213126B2 (en) 2008-11-13
JP4602995B2 (ja) 2010-12-22
CN1939018B (zh) 2011-01-05
CA2555397A1 (en) 2005-08-25
AR047592A1 (es) 2006-01-25
WO2005079031A2 (en) 2005-08-25
CN1939018A (zh) 2007-03-28
AU2005213126C1 (en) 2009-04-30
US20050176436A1 (en) 2005-08-11
KR20060125890A (ko) 2006-12-06
KR100893517B1 (ko) 2009-04-16
JP2007520978A (ja) 2007-07-26
US20100166118A1 (en) 2010-07-01
US7701917B2 (en) 2010-04-20
WO2005079031A3 (en) 2006-03-30

Similar Documents

Publication Publication Date Title
BRPI0507457A (pt) estimativa de canal para um sistema de comunicação sem fio com múltiplos fluxos paralelos de dados
TW200711406A (en) Timing control in orthogonal frequency division multiplex systems based on effective signal-to-noise ratio
TW200706017A (en) Improved channel estimation for single-carrier systems
NO20070901L (no) Frekvensdomenefiltering for a forbedre kanalestimering i flerbaeresystem
AR059205A1 (es) Un metodo de seleccion dependiente del formato de paquete del modulador mimo-ofdm
BR112017019486A2 (pt) dl baseado em dmrs para latência baixa
WO2010046748A3 (en) Using the same multiplexed radio resource for pilot and information signals
IL176305A0 (en) Channel estimation for an ofdm communication system with inactive subbands
WO2007095471A3 (en) Obscuring temporary user equipment identities
ATE506769T1 (de) Zellenauswahl in paketzugangs- kommunikationssystemen mit schneller abwärtsstrecke
EP1563622A4 (en) CHANNEL ESTIMATION FOR OFDM COMMUNICATION SYSTEMS
WO2008042672A3 (en) Code reuse multiple access for satellite return link
BRPI0519545A2 (pt) estimaÇço de canal para cancelamento de interferÊncia
WO2009117254A3 (en) Channel estimation in wireless systems with impulsive interference
WO2008005583A3 (en) System and method for anticipatory receiver switching based on signal quality estimation
BR112013003353A2 (pt) método, dispositivo e sistema para transmissão de dados
BRPI0407558A (pt) receptor de comunicação com um equalizador adaptativo que utiliza estimativa de canal
NO20084393L (no) Ratekontroll for flerkanals kommunikasjonssystemer
DE602004019262D1 (de) Mehrträgerempfänger
IL176119A0 (en) Autonomic reassociation of clients in a wireless local area network
BR112012024309A2 (pt) dispositivo de sincronização, dispositivo fonte e sistema de transmissão sem fio
WO2007083284A3 (en) System and/or method for channel estimation in communication systems
ATE400954T1 (de) Kanalschätzung mit verminderter komplexität in ofdm-systemen
ATE538538T1 (de) Verstärker für durch einen binären multiplex- offset-träger modulierte signale
NZ595435A (en) Improved blind modulation detection

Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 8A ANUIDADE, CONFORME ART. 10 DA RES. 124/06.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2204 DE 02/04/2013.