BR0101099A - Ofdm agrupada com estimativa de canal - Google Patents

Ofdm agrupada com estimativa de canal

Info

Publication number
BR0101099A
BR0101099A BR0101099-9A BR0101099A BR0101099A BR 0101099 A BR0101099 A BR 0101099A BR 0101099 A BR0101099 A BR 0101099A BR 0101099 A BR0101099 A BR 0101099A
Authority
BR
Brazil
Prior art keywords
ofdm
grouped
channel estimate
simplified
channel
Prior art date
Application number
BR0101099-9A
Other languages
English (en)
Inventor
Ye Li
Nelson Ray Sollenberger
Original Assignee
At & T Corp
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 At & T Corp filed Critical At & T Corp
Publication of BR0101099A publication Critical patent/BR0101099A/pt

Links

Classifications

    • 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
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • 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
    • H04L25/0204—Channel estimation of multiple channels
    • 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
    • H04L25/024—Channel estimation channel estimation algorithms
    • H04L25/0242—Channel estimation channel estimation algorithms using matrix methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/023—Multiplexing of multicarrier modulation signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Radio Transmission System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

"OFDM AGRUPADA COM ESTIMATIVA DE CANAL". Um receptor aperfeiçoado de OFDM é realizado mediante a utilização de uma função de retardo simplificada para o canal de transmissão. A função de retardo simplificada produz uma correlação simplificada no domínio da freq³ência que é aplicada para desenvolver uma Automatriz U que é usada no desenvolvimento de estimativas dos canais. Aquelas estimativas de canais são usadas no receptor para desenvolver os sinais de saída.
BR0101099-9A 2000-03-27 2001-03-20 Ofdm agrupada com estimativa de canal BR0101099A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/535,945 US6795392B1 (en) 2000-03-27 2000-03-27 Clustered OFDM with channel estimation

Publications (1)

Publication Number Publication Date
BR0101099A true BR0101099A (pt) 2001-11-06

Family

ID=24136469

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0101099-9A BR0101099A (pt) 2000-03-27 2001-03-20 Ofdm agrupada com estimativa de canal

Country Status (8)

Country Link
US (3) US6795392B1 (pt)
EP (1) EP1139628A3 (pt)
JP (1) JP4620277B2 (pt)
AR (1) AR030199A1 (pt)
BR (1) BR0101099A (pt)
CA (1) CA2341086C (pt)
HK (1) HK1039420A1 (pt)
TW (1) TW522694B (pt)

Families Citing this family (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7952511B1 (en) 1999-04-07 2011-05-31 Geer James L Method and apparatus for the detection of objects using electromagnetic wave attenuation patterns
US6795392B1 (en) * 2000-03-27 2004-09-21 At&T Corp. Clustered OFDM with channel estimation
JP2001339328A (ja) * 2000-05-25 2001-12-07 Communication Research Laboratory 受信装置、受信方法、ならびに、情報記録媒体
US6990061B2 (en) * 2000-05-31 2006-01-24 Interuniversitair Micro-Elektronica Centrum Method and apparatus for channel estimation
EP1170897B1 (en) 2000-07-05 2020-01-15 Wi-Fi One Technologies International Limited Pilot pattern design for a STTD scheme in an OFDM system
JP3639521B2 (ja) * 2000-11-10 2005-04-20 株式会社ケンウッド ダイバーシティ受信機及び直交周波数分割多重信号受信方法
US6947748B2 (en) 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
JP2002290367A (ja) * 2001-03-26 2002-10-04 Hitachi Kokusai Electric Inc 帯域分割復調方法及びｏｆｄｍ受信機
US7068592B1 (en) * 2001-05-10 2006-06-27 Conexant, Inc. System and method for increasing payload capacity by clustering unloaded bins in a data transmission system
US7158563B2 (en) * 2001-06-01 2007-01-02 The Board Of Trustees Of The Leland Stanford Junior University Dynamic digital communication system control
GB2386038A (en) 2002-02-27 2003-09-03 Motorola Inc Channel estimation in a radio receiver
US7173991B2 (en) * 2002-06-17 2007-02-06 Hitachi, Ltd. Methods and apparatus for spectral filtering channel estimates
US7161896B1 (en) * 2002-08-12 2007-01-09 Cisco Systems Wireless Networking (Australia) Pty Limited Channel estimation in a multicarrier radio receiver
US7215934B2 (en) * 2002-08-28 2007-05-08 Broadcom Corporation Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements
KR100471538B1 (ko) * 2002-09-18 2005-02-21 한기열 오에프디엠 시스템의 채널추정과 심볼동기 타이밍결정장치 및 방법
US7187940B2 (en) * 2003-07-31 2007-03-06 Motorola, Inc. Decorrelating rake receiver apparatus and method
WO2005025101A1 (ja) 2003-08-29 2005-03-17 National Institute Of Information And Communications Technology 送信装置、受信装置、送信方法、受信方法、ならびに、プログラム
US7570695B2 (en) * 2003-12-18 2009-08-04 Intel Corporation Method and adaptive bit interleaver for wideband systems using adaptive bit loading
EP1709745A4 (en) * 2004-01-30 2012-03-14 Univ Laval MULTI-USER ADAPTIVE NETWORK RECEIVER AND CORRESPONDING METHOD
GB0403762D0 (en) * 2004-02-20 2004-03-24 Qinetiq Ltd Frequency compensated communications reception
US7702045B2 (en) * 2004-08-31 2010-04-20 Theta Microelectronics, Inc. Method for estimating wireless channel parameters
US7081597B2 (en) * 2004-09-03 2006-07-25 The Esab Group, Inc. Electrode and electrode holder with threaded connection
US7573851B2 (en) 2004-12-07 2009-08-11 Adaptix, Inc. Method and system for switching antenna and channel assignments in broadband wireless networks
US7609773B2 (en) 2005-04-18 2009-10-27 Qualcomm Incorporated Method of determining the location of the FFT window and the delay spread for the platinum broadcast channel estimator
US8363577B2 (en) * 2005-05-13 2013-01-29 Qualcomm Incorporated Low complexity beamforming for multiple antenna systems
JP2007006264A (ja) * 2005-06-24 2007-01-11 Toshiba Corp ダイバーシチ受信機
US20070055784A1 (en) * 2005-09-08 2007-03-08 Pancholi Ketan P Method to reduce the learning curve of a transmission control protocol connection
US7974360B2 (en) 2006-05-24 2011-07-05 Qualcomm Incorporated Multi input multi output (MIMO) orthogonal frequency division multiple access (OFDMA) communication system
US8428197B2 (en) 2006-06-01 2013-04-23 Qualcomm Incorporated Enhanced channel estimation for communication system receiver
US7898478B2 (en) * 2007-02-28 2011-03-01 Samsung Electronics Co., Ltd. Method and system for analog beamforming in wireless communication systems
US7830984B2 (en) 2007-03-30 2010-11-09 Hong Kong Applied Science And Technology Research Institute Co., Ltd. OFDM/OFDMA channel estimation
US7881392B2 (en) * 2007-03-30 2011-02-01 Hong Kong Applied Science And Technology Research Institute Co., Ltd. OFDM/OFDMA timing synchronization using non-consecutive pilot subcarrier assignment
US7940848B2 (en) * 2007-04-02 2011-05-10 Infineon Technologies Ag System having an OFDM channel estimator
US7714783B2 (en) * 2007-08-02 2010-05-11 Samsung Electronics Co., Ltd. Method and system for analog beamforming in wireless communications
US8249513B2 (en) * 2007-08-13 2012-08-21 Samsung Electronics Co., Ltd. System and method for training different types of directional antennas that adapts the training sequence length to the number of antennas
US8411805B1 (en) * 2007-08-14 2013-04-02 Marvell International Ltd. Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems
US7714781B2 (en) * 2007-09-05 2010-05-11 Samsung Electronics Co., Ltd. Method and system for analog beamforming in wireless communication systems
US20090121935A1 (en) * 2007-11-12 2009-05-14 Samsung Electronics Co., Ltd. System and method of weighted averaging in the estimation of antenna beamforming coefficients
US8051037B2 (en) * 2008-01-25 2011-11-01 Samsung Electronics Co., Ltd. System and method for pseudorandom permutation for interleaving in wireless communications
US8165595B2 (en) * 2008-01-25 2012-04-24 Samsung Electronics Co., Ltd. System and method for multi-stage antenna training of beamforming vectors
US8280445B2 (en) * 2008-02-13 2012-10-02 Samsung Electronics Co., Ltd. System and method for antenna training of beamforming vectors by selective use of beam level training
JP5029439B2 (ja) * 2008-03-14 2012-09-19 富士通株式会社 無線通信装置及び干渉除去方法
US8417191B2 (en) * 2008-03-17 2013-04-09 Samsung Electronics Co., Ltd. Method and system for beamforming communication in high throughput wireless communication systems
US8478204B2 (en) * 2008-07-14 2013-07-02 Samsung Electronics Co., Ltd. System and method for antenna training of beamforming vectors having reuse of directional information
BRPI1010268B1 (pt) * 2009-03-27 2023-12-05 Aclara Power-Line Systems Inc Unidade de resposta à demanda (dru) e método de execução de resposta à demanda
US8879523B2 (en) * 2009-06-05 2014-11-04 Broadcom Corporation Management frame directed cluster assignment within multiple user, multiple access, and/or MIMO wireless communications
US8885535B2 (en) * 2009-06-05 2014-11-11 Broadcom Corporation Management frame map directed operational parameters within multiple user, multiple access, and/or MIMO wireless communications
CN102158437B (zh) * 2010-02-11 2014-07-02 富士通株式会社 信道频域相关性计算设备及方法
JP6386032B2 (ja) * 2013-05-29 2018-09-05 アルカテル−ルーセント 大規模なアンテナ・システムにおけるｃｓｉフィードバック方法および装置
US11316554B2 (en) * 2019-06-05 2022-04-26 Rincon Research Corporation Multi-antenna detection, localization, and filtering of complex time-and-doppler-shifted signals

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3563421B2 (ja) * 1993-08-25 2004-09-08 株式会社東芝 無線通信装置
US5481570A (en) * 1993-10-20 1996-01-02 At&T Corp. Block radio and adaptive arrays for wireless systems
AU4238697A (en) * 1996-08-29 1998-03-19 Cisco Technology, Inc. Spatio-temporal processing for communication
JP3559428B2 (ja) * 1997-06-26 2004-09-02 株式会社東芝 受信装置
JP3718337B2 (ja) * 1998-01-08 2005-11-24 株式会社東芝 適応可変指向性アンテナ
JP3724940B2 (ja) * 1998-01-08 2005-12-07 株式会社東芝 Ｏｆｄｍダイバーシチ受信装置
US6618454B1 (en) * 1998-02-06 2003-09-09 At&T Corp. Diversity coded OFDM for high data-rate communication
US6327314B1 (en) * 1998-04-01 2001-12-04 At&T Corp. Method and apparatus for channel estimation for multicarrier systems
US5973642A (en) * 1998-04-01 1999-10-26 At&T Corp. Adaptive antenna arrays for orthogonal frequency division multiplexing systems with co-channel interference
US6240141B1 (en) * 1998-05-09 2001-05-29 Centillium Communications, Inc. Lower-complexity peak-to-average reduction using intermediate-result subset sign-inversion for DSL
US6795424B1 (en) * 1998-06-30 2004-09-21 Tellabs Operations, Inc. Method and apparatus for interference suppression in orthogonal frequency division multiplexed (OFDM) wireless communication systems
US6266644B1 (en) * 1998-09-26 2001-07-24 Liquid Audio, Inc. Audio encoding apparatus and methods
JP2000183789A (ja) * 1998-12-10 2000-06-30 Matsushita Electric Ind Co Ltd デジタルテレビジョン放送受信装置
JP2001016180A (ja) * 1999-06-29 2001-01-19 Mitsubishi Electric Corp 直交偏波周波数多重信号受信装置
US6298035B1 (en) * 1999-12-21 2001-10-02 Nokia Networks Oy Estimation of two propagation channels in OFDM
US6473467B1 (en) * 2000-03-22 2002-10-29 Qualcomm Incorporated Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system
US6795392B1 (en) * 2000-03-27 2004-09-21 At&T Corp. Clustered OFDM with channel estimation
US6369758B1 (en) * 2000-11-01 2002-04-09 Unique Broadband Systems, Inc. Adaptive antenna array for mobile communication

Also Published As

Publication number Publication date
CA2341086A1 (en) 2001-09-27
CA2341086C (en) 2006-07-11
US7369487B2 (en) 2008-05-06
HK1039420A1 (zh) 2002-04-19
US6795392B1 (en) 2004-09-21
US20040234013A1 (en) 2004-11-25
JP4620277B2 (ja) 2011-01-26
US8320500B2 (en) 2012-11-27
TW522694B (en) 2003-03-01
EP1139628A3 (en) 2004-01-07
AR030199A1 (es) 2003-08-13
JP2001320344A (ja) 2001-11-16
EP1139628A9 (en) 2002-03-20
EP1139628A2 (en) 2001-10-04
US20090003489A1 (en) 2009-01-01

Similar Documents

Publication Publication Date Title
BR0101099A (pt) Ofdm agrupada com estimativa de canal
TR199701146T1 (xx) N�rotensin resept�rleri �zerinde etkili 1-Fenilpirazol-3-Karboksamidler.
BR0108347B1 (pt) composição de cosmético
AU6515799A (en) An object management system supporting the use of application domain knowledge mapped to technology domain knowledge
HN2001000146A (es) Derivados de pirazol
BRPI0507148A (pt) filtragem no tempo para mitigação de retardo em excesso em sistemas ofdm
BR9810301A (pt) Recepção de um sinal de espectro amplo
BR9906405A (pt) "aparelho de transmissão"
AR063780A2 (es) Un anticuerpo aislado composicion farmaceutica que lo comprende y metodo para inhibir la actividad de y detectar una interleuquina
DE69925414D1 (de) Damenbinde
DE69921547D1 (de) Damenbinde
DE69934176D1 (de) Damenbinde
AU1882400A (en) Time delay determination and determination of signal shift
BR9706911A (pt) Sistema de comunicações de linha de força não-invasivo
DE69734991D1 (de) Vorderseitige reisslinie einer unsichtbaren luftsackabdeckung
BR9704890A (pt) Estimação do canal de controle de potência com utilização de desmultiplicação do coeficiente dinâmico
DE69921557D1 (de) Damenbinde
BRPI0413496A (pt) estimativa de canal em um receptor "rake" de um sistema de comunicação cdma
NO20014756L (no) C(10)-heterosubstituerte acetattaxaner som antitmormidler
AR020799A1 (es) Receptor cdma que comparte un dispositivo de rastreo entre multiples derivaciones de inclinacion
DOP2001000219A (es) Applicator
BRPI0410006A (pt) método para a configuração espectral de sinais modulados por meio de multiplexação de divisão de freqüência ortogonal (ofdm) para uma rede elétrica
ATE385799T1 (de) Zusammensetzung einer natriumkanal-blockierenden verbindung
FI973578A (fi) Anatomisesti muotoiltu yhdistetty terveysside
DE59709526D1 (de) Schäumende körperreinigungsmittel

Legal Events

Date Code Title Description
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]