AR056603A1 - Precodificacion lineal para sistema duplex por division de tiempo - Google Patents

Precodificacion lineal para sistema duplex por division de tiempo

Info

Publication number
AR056603A1
AR056603A1 ARP060104730A ARP060104730A AR056603A1 AR 056603 A1 AR056603 A1 AR 056603A1 AR P060104730 A ARP060104730 A AR P060104730A AR P060104730 A ARP060104730 A AR P060104730A AR 056603 A1 AR056603 A1 AR 056603A1
Authority
AR
Argentina
Prior art keywords
link channel
time division
linear
precodification
direct link
Prior art date
Application number
ARP060104730A
Other languages
English (en)
Inventor
Jibing Wang
Tamer Kadous
Gwendolyn D Barriac
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 AR056603A1 publication Critical patent/AR056603A1/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0658—Feedback reduction
    • H04B7/0663—Feedback reduction using vector or matrix manipulations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
    • H04B7/0608—Antenna selection according to transmission parameters
    • H04B7/061—Antenna selection according to transmission parameters using feedback from receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0862—Weighted combining receiver computing weights based on information from the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H04B7/0421—Feedback systems utilizing implicit feedback, e.g. steered pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Métodos y aparatos que facilitan la generacion y/o la utilizacion de retroalimentacion explícita e implícita relacionada con un canal de enlace directo para la precodificacion lineal en un sistema de multiples entradas y de multiples salidas (MIMO, multi-input multi-output) de duplex por division de tiempo (TDD, time division duplex). La retroalimentacion implícita puede ser provista mediante la estimacion de un canal de enlace inverso, que puede ser sustancialmente similar a por lo menos una porcion del canal de enlace directo (por ejemplo, basado en la reciprocidad). Por otra parte, puede obtenerse la retroalimentacion explícita mediante la cuantificacion de por lo menos parte de una estimacion del canal de enlace directo (por ejemplo, mediante la utilizacion de la cuantificacion de vectores y/o la cuantificacion escalar).
ARP060104730A 2005-10-27 2006-10-27 Precodificacion lineal para sistema duplex por division de tiempo AR056603A1 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US73102705P 2005-10-27 2005-10-27
US11/552,960 US7948959B2 (en) 2005-10-27 2006-10-25 Linear precoding for time division duplex system

Publications (1)

Publication Number Publication Date
AR056603A1 true AR056603A1 (es) 2007-10-10

Family

ID=37770837

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP060104730A AR056603A1 (es) 2005-10-27 2006-10-27 Precodificacion lineal para sistema duplex por division de tiempo

Country Status (11)

Country Link
US (1) US7948959B2 (es)
EP (1) EP1941633B1 (es)
JP (1) JP5199105B2 (es)
KR (1) KR100938795B1 (es)
CN (1) CN101341670B (es)
AR (1) AR056603A1 (es)
BR (1) BRPI0617906A2 (es)
CA (1) CA2627395A1 (es)
RU (1) RU2402162C2 (es)
TW (1) TWI339035B (es)
WO (1) WO2007050860A1 (es)

Families Citing this family (81)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7917176B2 (en) * 2006-02-14 2011-03-29 Nec Laboratories America, Inc. Structured codebook and successive beamforming for multiple-antenna systems
US7778607B2 (en) * 2005-10-31 2010-08-17 The Mitre Corporation Echo MIMO: a method for optimal multiple input multiple output channel estimation and matched cooperative beamforming
US7991090B2 (en) * 2006-05-04 2011-08-02 Broadcom Corporation Method and system for reordered QRV-LST (layered space time) detection for efficient processing for multiple input multiple output (MIMO) communication systems
US8194760B2 (en) 2006-06-01 2012-06-05 Ntt Docomo, Inc. Method and apparatus for distributed space-time coding in wireless radio networks
KR100785852B1 (ko) * 2006-06-26 2007-12-14 한국전자통신연구원 직교 주파수 분할 다중 접속 기반 무선 통신 시스템에서의전송효율 최대화를 위한 서브채널 할당 및 고정빔 형성전송 방법 및 장치
US7961640B2 (en) * 2006-10-26 2011-06-14 Qualcomm Incorporated Method and apparatus for codebook exchange in a multiple access wireless communication system
JP4536767B2 (ja) * 2006-10-30 2010-09-01 株式会社エヌ・ティ・ティ・ドコモ 受信装置、送信装置、及びｍｉｍｏ伝送における送信装置でのプリコーディングを制御する受信及び送信方法
US8027407B2 (en) 2006-11-06 2011-09-27 Ntt Docomo, Inc. Method and apparatus for asynchronous space-time coded transmission from multiple base stations over wireless radio networks
US8059732B2 (en) 2006-11-28 2011-11-15 Ntt Docomo, Inc. Method and apparatus for wideband transmission from multiple non-collocated base stations over wireless radio networks
US8942306B2 (en) * 2007-03-07 2015-01-27 Marvell World Trade Ltd. Codebook selection for transmit beamforming
US8861356B2 (en) 2007-03-13 2014-10-14 Ntt Docomo, Inc. Method and apparatus for prioritized information delivery with network coding over time-varying network topologies
US8064548B2 (en) 2007-05-18 2011-11-22 Ntt Docomo, Inc. Adaptive MaxLogMAP-type receiver structures
US20080317145A1 (en) * 2007-06-25 2008-12-25 Bruno Clerckx Multiple input multiple output communication system and a method of adaptively generating codebook
EP2171880B1 (en) * 2007-07-19 2011-05-11 InterDigital Technology Corporation Wireless communication method and apparatus for encoding and decoding beamforming vectors
US20090046801A1 (en) * 2007-08-14 2009-02-19 Interdigital Technology Corporation Method and apparatus for creating a multi-user mimo codebook using a single user mimo codebook
US8036099B2 (en) * 2007-09-06 2011-10-11 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for linearly precoding downlink transmissions to reduce temporal variations in interference
US20090075686A1 (en) * 2007-09-19 2009-03-19 Gomadam Krishna S Method and apparatus for wideband transmission based on multi-user mimo and two-way training
KR101349827B1 (ko) * 2007-11-05 2014-01-09 엘지전자 주식회사 코드북 기반의 빔포밍 기법을 적용하는 다중 입출력시스템에 있어서, 빔포밍 정보를 송신하는 방법 및 이동단말의 위치를 추적하는 방법
CN101471707B (zh) * 2007-12-28 2013-09-11 华为技术有限公司 时分双工多输入多输出的下行波束形成方法、装置和系统
CN101471708B (zh) 2007-12-28 2012-09-05 华为技术有限公司 时分双工多输入多输出的下行波束形成方法、装置和系统
WO2009082853A1 (fr) * 2007-12-28 2009-07-09 Zte Corporation Procédé de traitement de livre de codes auto-adaptatif
KR100991793B1 (ko) * 2007-12-31 2010-11-03 엘지전자 주식회사 셀간 간섭 감소 방법
US8325840B2 (en) 2008-02-25 2012-12-04 Ntt Docomo, Inc. Tree position adaptive soft output M-algorithm receiver structures
US8279954B2 (en) 2008-03-06 2012-10-02 Ntt Docomo, Inc. Adaptive forward-backward soft output M-algorithm receiver structures
US9300371B1 (en) 2008-03-07 2016-03-29 Marvell International Ltd. Beamforming systems and methods
KR100991791B1 (ko) 2008-03-28 2010-11-04 엘지전자 주식회사 다중 셀 환경에서 셀간 간섭 회피 방법
CN102027693B (zh) * 2008-03-28 2015-04-22 Lg电子株式会社 用于避免多小区环境中的小区间干扰的方法
US8498358B2 (en) * 2008-04-25 2013-07-30 Samsung Electronics Co., Ltd. Multiple antenna communication system including adaptive updating and changing of codebooks
KR100913940B1 (ko) * 2008-04-25 2009-08-26 삼성전자주식회사 적응적으로 코드북을 변경하거나 업데이트하는 다중 안테나 통신 시스템
US8140098B2 (en) * 2008-05-15 2012-03-20 Qualcomm Incorporated Spatial interference mitigation for wireless communication
US8565329B2 (en) 2008-06-03 2013-10-22 Ntt Docomo, Inc. Soft output M-algorithm receiver structures with generalized survivor selection criteria for MIMO systems
US8229443B2 (en) 2008-08-13 2012-07-24 Ntt Docomo, Inc. Method of combined user and coordination pattern scheduling over varying antenna and base-station coordination patterns in a multi-cell environment
US8451951B2 (en) 2008-08-15 2013-05-28 Ntt Docomo, Inc. Channel classification and rate adaptation for SU-MIMO systems
US8705484B2 (en) 2008-08-15 2014-04-22 Ntt Docomo, Inc. Method for varying transmit power patterns in a multi-cell environment
US8542640B2 (en) 2008-08-28 2013-09-24 Ntt Docomo, Inc. Inter-cell approach to operating wireless beam-forming and user selection/scheduling in multi-cell environments based on limited signaling between patterns of subsets of cells
US8855221B2 (en) 2008-09-15 2014-10-07 Ntt Docomo, Inc. Method and apparatus for iterative receiver structures for OFDM/MIMO systems with bit interleaved coded modulation
KR101594815B1 (ko) * 2008-10-20 2016-02-29 삼성전자주식회사 적응적으로 코드북을 생성하고 사용하는 다중 입출력 통신 시스템 및 통신 방법
JP5291199B2 (ja) * 2008-10-31 2013-09-18 テレフオンアクチーボラゲット エル エム エリクソン（パブル） チャネル利用反復的プリコーダ選択
CN101483909B (zh) * 2009-02-06 2011-03-02 中兴通讯股份有限公司 基于多载波的反向功率控制方法
US8649456B2 (en) 2009-03-12 2014-02-11 Futurewei Technologies, Inc. System and method for channel information feedback in a wireless communications system
US8830918B2 (en) * 2009-03-16 2014-09-09 Interdigital Patent Holdings, Inc. Method and apparatus for performing uplink transmit diversity
US8675627B2 (en) 2009-03-23 2014-03-18 Futurewei Technologies, Inc. Adaptive precoding codebooks for wireless communications
US8243610B2 (en) * 2009-04-21 2012-08-14 Futurewei Technologies, Inc. System and method for precoding codebook adaptation with low feedback overhead
US9048977B2 (en) 2009-05-05 2015-06-02 Ntt Docomo, Inc. Receiver terminal driven joint encoder and decoder mode adaptation for SU-MIMO systems
EP2448137A1 (en) * 2009-06-23 2012-05-02 Alcatel Lucent Method and device for signal transmission in time-division duplex mimo system
KR101534865B1 (ko) * 2009-06-23 2015-07-27 엘지전자 주식회사 링크 적응 절차 수행 방법
KR101568291B1 (ko) * 2009-07-10 2015-11-20 삼성전자주식회사 단말기 및 기지국, 및 단말기의 동작방법
CN101997587B (zh) * 2009-08-14 2014-11-05 中兴通讯股份有限公司 多点协作传输中的cqi值确定方法及装置
CN102025404B (zh) * 2009-09-15 2014-06-11 中兴通讯股份有限公司 一种码本生成方法及装置
US8644368B1 (en) * 2009-09-23 2014-02-04 Marvell International Ltd. Transparent implicit beamforming in a communication system
KR20110036374A (ko) * 2009-10-01 2011-04-07 삼성전자주식회사 명시적 피드백을 사용하는 다중 입출력 통신 시스템
US8902873B2 (en) * 2009-10-08 2014-12-02 Qualcomm Incorporated Efficient signaling for closed-loop transmit diversity
US8559544B2 (en) * 2009-11-10 2013-10-15 Georgia Tech Research Corporation Systems and methods for lattice reduction
US9319251B2 (en) 2010-01-04 2016-04-19 Samsung Electronics Co., Ltd. Multiple-input multiple-output (MIMO) communication system using a codebook and method of designing the codebook
US8514961B2 (en) 2010-02-04 2013-08-20 Ntt Docomo, Inc. Method and apparatus for distributed space-time coding in wireless radio networks
US9225502B2 (en) 2011-03-31 2015-12-29 Telefonaktiebolaget L M Ericsson (Publ) Method and network node for determining channel state information in an upcoming time slot
WO2012141428A1 (ko) * 2011-04-13 2012-10-18 엘지전자 주식회사 채널상태정보 송수신 방법 및 송수신 장치
CN102122983B (zh) * 2011-04-18 2014-08-06 电信科学技术研究院 一种码本的生成、信息的发送、反馈方法及设备
US10567060B2 (en) * 2014-10-24 2020-02-18 Samsung Electronics Co., Ltd. Efficient vector quantizer for FD-MIMO systems
WO2016064246A1 (en) 2014-10-24 2016-04-28 Samsung Electronics Co., Ltd. Efficient vector quantizer for fd-mimo systems
WO2019089986A1 (en) * 2017-11-01 2019-05-09 Cohere Technologies, Inc. Precoding in wireless systems using orthogonal time frequency space multiplexing
CN110535497B (zh) * 2018-08-10 2022-07-19 中兴通讯股份有限公司 Csi发送、接收方法及其装置、通信节点及存储介质
WO2020042107A1 (en) * 2018-08-30 2020-03-05 Nokia Shanghai Bell Co., Ltd. Determination of downlink channel state information in massive mimo systems
US10812216B2 (en) 2018-11-05 2020-10-20 XCOM Labs, Inc. Cooperative multiple-input multiple-output downlink scheduling
US10659112B1 (en) 2018-11-05 2020-05-19 XCOM Labs, Inc. User equipment assisted multiple-input multiple-output downlink configuration
US10432272B1 (en) 2018-11-05 2019-10-01 XCOM Labs, Inc. Variable multiple-input multiple-output downlink user equipment
US10756860B2 (en) 2018-11-05 2020-08-25 XCOM Labs, Inc. Distributed multiple-input multiple-output downlink configuration
KR20210087089A (ko) 2018-11-27 2021-07-09 엑스콤 랩스 인코퍼레이티드 넌-코히어런트 협력 다중 입출력 통신
US11063645B2 (en) 2018-12-18 2021-07-13 XCOM Labs, Inc. Methods of wirelessly communicating with a group of devices
US10756795B2 (en) 2018-12-18 2020-08-25 XCOM Labs, Inc. User equipment with cellular link and peer-to-peer link
US11330649B2 (en) 2019-01-25 2022-05-10 XCOM Labs, Inc. Methods and systems of multi-link peer-to-peer communications
US10756767B1 (en) 2019-02-05 2020-08-25 XCOM Labs, Inc. User equipment for wirelessly communicating cellular signal with another user equipment
US11032841B2 (en) 2019-04-26 2021-06-08 XCOM Labs, Inc. Downlink active set management for multiple-input multiple-output communications
US10756782B1 (en) 2019-04-26 2020-08-25 XCOM Labs, Inc. Uplink active set management for multiple-input multiple-output communications
US10735057B1 (en) 2019-04-29 2020-08-04 XCOM Labs, Inc. Uplink user equipment selection
US10686502B1 (en) 2019-04-29 2020-06-16 XCOM Labs, Inc. Downlink user equipment selection
US11411778B2 (en) 2019-07-12 2022-08-09 XCOM Labs, Inc. Time-division duplex multiple input multiple output calibration
US11411779B2 (en) 2020-03-31 2022-08-09 XCOM Labs, Inc. Reference signal channel estimation
EP4158795A4 (en) 2020-05-26 2024-06-19 Xcom Labs, Inc. BEAMFORMING ACCOUNTING FOR INTERFERENCE
CA3195885A1 (en) 2020-10-19 2022-04-28 XCOM Labs, Inc. Reference signal for wireless communication systems
WO2022093988A1 (en) 2020-10-30 2022-05-05 XCOM Labs, Inc. Clustering and/or rate selection in multiple-input multiple-output communication systems

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6553012B1 (en) * 1997-02-13 2003-04-22 Nokia Telecommunications Oy Method and apparatus for directional radio communication
FI106665B (fi) 1997-11-05 2001-03-15 Nokia Mobile Phones Ltd Menetelmä ja järjestely lähetystehon määrittämiseksi matkaviestimessä
EP1334573B1 (en) 2000-11-17 2006-06-14 Nokia Corporation Method for controlling the data signal weighting in multi-element transceivers and corresponding devices and telecommunications network
US6859503B2 (en) * 2001-04-07 2005-02-22 Motorola, Inc. Method and system in a transceiver for controlling a multiple-input, multiple-output communications channel
US6662024B2 (en) * 2001-05-16 2003-12-09 Qualcomm Incorporated Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system
US7324429B2 (en) 2002-10-25 2008-01-29 Qualcomm, Incorporated Multi-mode terminal in a wireless MIMO system
GB2404820B (en) * 2003-08-06 2005-07-20 Toshiba Res Europ Ltd Improved wireless local area network security
US7257167B2 (en) * 2003-08-19 2007-08-14 The University Of Hong Kong System and method for multi-access MIMO channels with feedback capacity constraint
US7636406B2 (en) * 2004-05-05 2009-12-22 Metalink Ltd. System and method of a MIMO transmitter / receiver
US7676007B1 (en) * 2004-07-21 2010-03-09 Jihoon Choi System and method for interpolation based transmit beamforming for MIMO-OFDM with partial feedback
US7362822B2 (en) * 2004-09-08 2008-04-22 Intel Corporation Recursive reduction of channel state feedback
US7778826B2 (en) * 2005-01-13 2010-08-17 Intel Corporation Beamforming codebook generation system and associated methods
US20090129501A1 (en) * 2005-08-19 2009-05-21 Mehta Neelesh B Optimal signaling and selection verification for transmit antenna selection with erroneous feedback
DE602006021682D1 (de) * 2005-10-17 2011-06-16 Samsung Electronics Co Ltd Verfahren und Vorrichtung zum Senden/Empfangen von Daten in einem Mehrbenutzer, Mehrantennen Kommunikationssystem
US20070211813A1 (en) * 2006-03-10 2007-09-13 Shilpa Talwar MIMO precoding in the presence of co-channel interference

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Publication number Publication date
CN101341670A (zh) 2009-01-07
RU2402162C2 (ru) 2010-10-20
US20070115909A1 (en) 2007-05-24
US7948959B2 (en) 2011-05-24
TWI339035B (en) 2011-03-11
TW200731694A (en) 2007-08-16
BRPI0617906A2 (pt) 2011-08-09
JP5199105B2 (ja) 2013-05-15
RU2008121189A (ru) 2009-12-10
JP2009514382A (ja) 2009-04-02
CA2627395A1 (en) 2007-05-03
KR20080064187A (ko) 2008-07-08
CN101341670B (zh) 2013-11-06
EP1941633B1 (en) 2016-05-04
KR100938795B1 (ko) 2010-01-27
EP1941633A1 (en) 2008-07-09
WO2007050860A1 (en) 2007-05-03

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