ATE453969T1 - Verfahren zum reduzieren des rückmeldeinformations-overhead in vorcodiertren mimo-ofdm-systemen - Google Patents

Verfahren zum reduzieren des rückmeldeinformations-overhead in vorcodiertren mimo-ofdm-systemen

Info

Publication number
ATE453969T1
ATE453969T1 AT06742199T AT06742199T ATE453969T1 AT E453969 T1 ATE453969 T1 AT E453969T1 AT 06742199 T AT06742199 T AT 06742199T AT 06742199 T AT06742199 T AT 06742199T AT E453969 T1 ATE453969 T1 AT E453969T1
Authority
AT
Austria
Prior art keywords
feedback information
bands
sub
ofdm systems
mimo ofdm
Prior art date
Application number
AT06742199T
Other languages
English (en)
Inventor
Mattias Wennstrom
Jaap Van De Beek
Original Assignee
Huawei Tech Co Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38956502&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ATE453969(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Huawei Tech Co Ltd filed Critical Huawei Tech Co Ltd
Application granted granted Critical
Publication of ATE453969T1 publication Critical patent/ATE453969T1/de

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
    • H04B7/066—Combined feedback for a number of channels, e.g. over several subcarriers like in orthogonal frequency division multiplexing [OFDM]
    • 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
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • 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
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H04L2025/03414—Multicarrier
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03426—Arrangements for removing intersymbol interference characterised by the type of transmission transmission using multiple-input and multiple-output 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03777—Arrangements for removing intersymbol interference characterised by the signalling
    • H04L2025/03802—Signalling on the reverse channel
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Amplifiers (AREA)
AT06742199T 2006-06-20 2006-06-20 Verfahren zum reduzieren des rückmeldeinformations-overhead in vorcodiertren mimo-ofdm-systemen ATE453969T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2006/001403 WO2008009157A1 (en) 2006-06-20 2006-06-20 Method for reducing feedback information overhead in precoded mimo-ofdm systems

Publications (1)

Publication Number Publication Date
ATE453969T1 true ATE453969T1 (de) 2010-01-15

Family

ID=38956502

Family Applications (1)

Application Number Title Priority Date Filing Date
AT06742199T ATE453969T1 (de) 2006-06-20 2006-06-20 Verfahren zum reduzieren des rückmeldeinformations-overhead in vorcodiertren mimo-ofdm-systemen

Country Status (12)

Country Link
US (1) US7817739B2 (de)
EP (2) EP2033335B1 (de)
JP (1) JP5032569B2 (de)
CN (1) CN101273548B (de)
AT (1) ATE453969T1 (de)
BR (1) BRPI0621788B1 (de)
CA (1) CA2655757C (de)
DE (1) DE602006011514D1 (de)
ES (2) ES2495423T3 (de)
PL (1) PL2157707T3 (de)
PT (1) PT2157707E (de)
WO (1) WO2008009157A1 (de)

Families Citing this family (72)

* 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
EP2033335B1 (de) 2006-06-20 2009-12-30 Huawei Technologies Co., Ltd. Verfahren zum reduzieren des rückmeldeinformations-overhead in vorcodiertren mimo-ofdm-systemen
KR101455981B1 (ko) * 2007-08-14 2014-11-03 엘지전자 주식회사 하향링크 상황에 따른 적응적 채널 품질 지시자 생성 방법및 이를 위한 사용자 기기
JP2009182578A (ja) * 2008-01-30 2009-08-13 Fujitsu Ltd Ｍｉｍｏ−ｏｆｄｍ受信装置およびｍｉｍｏ−ｏｆｄｍ通信システム
KR101611945B1 (ko) * 2008-02-28 2016-04-12 애플 인크. 무선 통신 시그널링에 적용되는 코딩을 식별하는 정보를 포함하는 피드백 데이터 구조체의 통신
JP5233331B2 (ja) * 2008-03-12 2013-07-10 富士通株式会社 無線基地局、無線端末及び無線通信方法
KR101336961B1 (ko) 2008-04-17 2013-12-04 삼성전자주식회사 다중 입출력 무선통신 시스템에서 미드앰블을 이용한프리코딩 장치 및 방법
US8811353B2 (en) 2008-04-22 2014-08-19 Texas Instruments Incorporated Rank and PMI in download control signaling for uplink single-user MIMO (UL SU-MIMO)
JP5251304B2 (ja) * 2008-07-04 2013-07-31 日本電気株式会社 通信システム、無線通信装置、及び通信方法
KR20100019948A (ko) * 2008-08-11 2010-02-19 엘지전자 주식회사 공간 다중화 기법을 이용한 데이터 전송방법
CN101674165A (zh) * 2008-09-09 2010-03-17 华为技术有限公司 多载波通信系统中信号误差的反馈方法、设备及系统
US8396163B2 (en) 2008-09-18 2013-03-12 Commonwealth Scientific And Industrial Research Organization Vector quantization in wireless communication
JP5346942B2 (ja) * 2008-09-22 2013-11-20 株式会社エヌ・ティ・ティ・ドコモ 基地局装置及びプリコーディング方法
JP5213044B2 (ja) * 2008-11-11 2013-06-19 日本電気株式会社 通信装置、無線通信システムおよび推定情報のフィードバック方法ならびにプログラム
KR101526015B1 (ko) 2008-11-25 2015-06-05 엘지전자 주식회사 무선통신 시스템에서 데이터 전송방법
EP2197125B1 (de) * 2008-12-12 2018-07-25 Electronics and Telecommunications Research Institute Kommunikationssystem mit einem Kommunikationsschema mit mehreren Eingängen und mehreren Ausgängen für mehrere Benutzer (MU-MIMO)
US8391392B2 (en) 2009-01-05 2013-03-05 Marvell World Trade Ltd. Precoding codebooks for MIMO communication systems
US8385441B2 (en) 2009-01-06 2013-02-26 Marvell World Trade Ltd. Efficient MIMO transmission schemes
US8532677B2 (en) 2009-01-13 2013-09-10 Nokia Siemens Networks Gmbh & Co. Model based channel state information feedback
CN101783776B (zh) * 2009-01-15 2013-04-24 华为技术有限公司 预编码反馈方法及系统、用户设备和基站
US8238483B2 (en) 2009-02-27 2012-08-07 Marvell World Trade Ltd. Signaling of dedicated reference signal (DRS) precoding granularity
KR101753391B1 (ko) 2009-03-30 2017-07-04 엘지전자 주식회사 무선 통신 시스템에서 신호 전송 방법 및 장치
EP3512219B1 (de) 2009-04-06 2022-05-04 Marvell Asia Pte, Ltd. Verbesserte feedback-strategien für multi-benutzer mimo-kommunikationssysteme
US8351533B2 (en) * 2009-04-16 2013-01-08 Intel Corporation Group resource allocation techniques for IEEE 802.16m
US8543063B2 (en) 2009-04-21 2013-09-24 Marvell World Trade Ltd. Multi-point opportunistic beamforming with selective beam attenuation
JP5135282B2 (ja) * 2009-05-14 2013-02-06 株式会社日立製作所 無線基地局装置
CN101902304B (zh) * 2009-05-25 2014-10-15 株式会社Ntt都科摩 一种信道信息反馈方法、预编码方法、接收站及发送站
CN101931442B (zh) * 2009-06-22 2013-07-31 电信科学技术研究院 一种信息指示的方法及装置
JP5418598B2 (ja) * 2009-09-15 2014-02-19 富士通株式会社 無線通信システム、無線通信装置および無線通信方法
US8675794B1 (en) 2009-10-13 2014-03-18 Marvell International Ltd. Efficient estimation of feedback for modulation and coding scheme (MCS) selection
US8917796B1 (en) 2009-10-19 2014-12-23 Marvell International Ltd. Transmission-mode-aware rate matching in MIMO signal generation
CN102045096A (zh) * 2009-10-23 2011-05-04 北京新岸线移动多媒体技术有限公司 信息发送方法、用于信息发送的装置、用于通信的装置
JP5669854B2 (ja) 2009-11-09 2015-02-18 マーベル ワールド トレード リミテッド 調整送信を利用する基地局にフィードバックデータを送信するための方法及び装置、並びに調整送信スキームを利用する基地局及びフィードバックデータを送信する移動通信端末を備えたシステム
CN102783120B (zh) 2009-12-17 2015-07-01 马维尔国际贸易有限公司 用于交叉极化天线的mimo反馈方案
DE202011111016U1 (de) 2010-01-07 2018-05-02 Marvell World Trade Ltd. Signalisierung von dedizierten Referenzsignal (DRS) - Vorcodierungsgranularität
US9148205B2 (en) 2010-01-25 2015-09-29 Qualcomm Incorporated Feedback for supporting SU-MIMO and MU-MIMO operation in wireless communication
JP5258002B2 (ja) * 2010-02-10 2013-08-07 マーベル ワールド トレード リミテッド Ｍｉｍｏ通信システムにおける装置、移動通信端末、チップセット、およびその方法
KR101276855B1 (ko) 2010-03-08 2013-06-18 엘지전자 주식회사 프리코딩 행렬 정보 전송방법 및 사용자기기와, 프리코딩 행렬 구성방법 및 기지국
US8687741B1 (en) 2010-03-29 2014-04-01 Marvell International Ltd. Scoring hypotheses in LTE cell search
CN102714647B (zh) 2010-04-06 2015-03-11 诺基亚公司 用于多粒度反馈的码本设计的方法和装置
CN101873160A (zh) * 2010-06-12 2010-10-27 北京邮电大学 一种在反馈由多个码字构成的序列时降低反馈量的方法
CN102291220B (zh) * 2010-06-18 2014-01-08 电信科学技术研究院 一种反馈、获得信道状态信息的反馈方法及装置
CN102299776B (zh) * 2010-06-22 2013-12-25 电信科学技术研究院 信道信息反馈方法、装置及信号预处理方法、装置
EP2606582B1 (de) 2010-08-16 2014-06-04 Telefonaktiebolaget L M Ericsson (publ) Verfahren zur bestimmung von vorcodierten gewichten
US8615052B2 (en) 2010-10-06 2013-12-24 Marvell World Trade Ltd. Enhanced channel feedback for multi-user MIMO
JP2012100254A (ja) 2010-10-06 2012-05-24 Marvell World Trade Ltd Ｐｕｃｃｈフィードバックのためのコードブックサブサンプリング
WO2012060631A2 (ko) * 2010-11-02 2012-05-10 엘지전자 주식회사 보간을 이용한 프리코딩 행렬 지시자 피드백 방법 및 장치
CN102082639B (zh) * 2010-11-08 2014-01-29 大唐移动通信设备有限公司 信道状态信息的传输方法和设备
US9048970B1 (en) 2011-01-14 2015-06-02 Marvell International Ltd. Feedback for cooperative multipoint transmission systems
US8861391B1 (en) 2011-03-02 2014-10-14 Marvell International Ltd. Channel feedback for TDM scheduling in heterogeneous networks having multiple cell classes
CN103548284B (zh) 2011-03-31 2017-07-21 马维尔国际贸易有限公司 用于协作多点传输的信道反馈
EP3232590B1 (de) 2011-04-19 2018-12-05 Sun Patent Trust Kommunikationsverfahren und -vorrichtung
US8743988B2 (en) 2011-07-29 2014-06-03 Telefonaktiebolaget Lm Ericsson (Publ) Transmission mode adaptation in a wireless network
CN102291167B (zh) * 2011-08-05 2018-06-15 中兴通讯股份有限公司 一种性能测试方法和系统
WO2013068915A2 (en) 2011-11-07 2013-05-16 Marvell World Trade Ltd. Precoding feedback for cross-polarized antennas with magnitude information
US8923427B2 (en) 2011-11-07 2014-12-30 Marvell World Trade Ltd. Codebook sub-sampling for frequency-selective precoding feedback
US9031597B2 (en) 2011-11-10 2015-05-12 Marvell World Trade Ltd. Differential CQI encoding for cooperative multipoint feedback
US9220087B1 (en) 2011-12-08 2015-12-22 Marvell International Ltd. Dynamic point selection with combined PUCCH/PUSCH feedback
US9178590B2 (en) 2011-12-27 2015-11-03 Industrial Technology Research Institute Channel information feedback method and wireless communication device using the same
US8902842B1 (en) 2012-01-11 2014-12-02 Marvell International Ltd Control signaling and resource mapping for coordinated transmission
JP5488627B2 (ja) * 2012-02-23 2014-05-14 富士通株式会社 Ｍｉｍｏ−ｏｆｄｍ受信装置およびｍｉｍｏ−ｏｆｄｍ通信システム
US9019896B2 (en) 2012-04-23 2015-04-28 Qualcomm Incorporated Systems and methods for low overhead paging
US9143951B2 (en) 2012-04-27 2015-09-22 Marvell World Trade Ltd. Method and system for coordinated multipoint (CoMP) communication between base-stations and mobile communication terminals
US9769677B2 (en) * 2012-07-02 2017-09-19 Industrial Technology Research Institute Method and apparatus for bit-adaptive precoding matrix indicator feedback
EP2985923B1 (de) * 2013-05-10 2019-04-03 Huawei Technologies Co., Ltd. Verfahren zur bestimmung eines vorcodierungsmatrixindikators, benutzervorrichtung und basisstation
CN106301506B (zh) * 2015-05-15 2020-03-13 电信科学技术研究院 一种码本子集约束的方法及装置
MY193065A (en) 2015-11-05 2022-09-26 Ericsson Telefon Ab L M Codebook subset restriction for full-dimension mimo
CN109257153B (zh) * 2017-03-24 2020-03-20 华为技术有限公司 一种参考信号发送方法、接收方法和装置
EP3737009A4 (de) 2018-01-29 2020-12-30 Huawei Technologies Co., Ltd. Verfahren zur meldung eines vorcodierungsmatrixindex, kommunikationsvorrichtung und medium
US10965786B2 (en) 2018-10-31 2021-03-30 At&T Intellectual Property I, L.P. Adaptive fixed point mapping for uplink and downlink fronthaul
CN118199834A (zh) * 2019-01-09 2024-06-14 华为技术有限公司 参数配置方法和通信装置
CN116419382A (zh) * 2021-12-31 2023-07-11 华为技术有限公司 一种上行预编码方法及装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100477103B1 (ko) * 2001-12-19 2005-03-18 삼성에스디아이 주식회사 금속유도화 측면결정화방법을 이용한 멀티플 게이트 박막트랜지스터 및 그의 제조방법
US7680461B2 (en) * 2003-11-05 2010-03-16 Sony Corporation Wireless communications system, wireless communications method, and wireless communications apparatus
KR100690872B1 (ko) * 2004-01-20 2007-03-09 엘지전자 주식회사 폐루프 ｍｉｍｏ 시스템의 신호 전송 방법
US7570696B2 (en) * 2004-06-25 2009-08-04 Intel Corporation Multiple input multiple output multicarrier communication system and methods with quantized beamforming feedback
US7609780B2 (en) * 2004-09-30 2009-10-27 Intel Corporation Method and apparatus for performing sequential closed loop multiple input multiple output (MIMO)
US8031642B2 (en) * 2004-10-20 2011-10-04 Zte (Usa) Inc. Subcarrier cluster-based power control in wireless communications
US7139328B2 (en) * 2004-11-04 2006-11-21 Motorola, Inc. Method and apparatus for closed loop data transmission
CA2646693C (en) 2006-03-24 2012-07-17 Huawei Technologies Co., Ltd. Method and system for subband indicator signalling
EP2033335B1 (de) 2006-06-20 2009-12-30 Huawei Technologies Co., Ltd. Verfahren zum reduzieren des rückmeldeinformations-overhead in vorcodiertren mimo-ofdm-systemen

Also Published As

Publication number Publication date
WO2008009157A1 (en) 2008-01-24
US20090147880A1 (en) 2009-06-11
PL2157707T3 (pl) 2012-12-31
CN101273548B (zh) 2010-12-08
EP2157707B1 (de) 2012-07-04
CA2655757C (en) 2012-01-31
PT2157707E (pt) 2012-09-14
US7817739B2 (en) 2010-10-19
JP5032569B2 (ja) 2012-09-26
CA2655757A1 (en) 2008-01-24
JP2009542052A (ja) 2009-11-26
BRPI0621788B1 (pt) 2016-05-31
EP2033335B1 (de) 2009-12-30
BRPI0621788A2 (pt) 2011-12-20
EP2033335A1 (de) 2009-03-11
EP2157707A1 (de) 2010-02-24
EP2033335A4 (de) 2009-08-26
ES2495423T3 (es) 2014-09-17
CN101273548A (zh) 2008-09-24
DE602006011514D1 (de) 2010-02-11
ES2339277T3 (es) 2010-05-18

Similar Documents

Publication Publication Date Title
ATE453969T1 (de) Verfahren zum reduzieren des rückmeldeinformations-overhead in vorcodiertren mimo-ofdm-systemen
WO2011019962A3 (en) Method and apparatus for supporting single-user multiple-input multiple-output (su-mimo) and multi-user mimo (mu-mimo)
WO2010039585A3 (en) Methods and apparatus for partial interference reduction within wireless networks
WO2010002691A3 (en) Method and apparatus for performing single-user and multiple-user multiple-input multiple-output wireless communications
WO2008103313A3 (en) Method and apparatus for transmitting control signaling for mimo transmission
WO2012044088A3 (ko) 다중 안테나 지원 무선 통신 시스템에서 효율적인 피드백 방법 및 장치
MY159052A (en) Method and apparatus for efficient precoding information validation for mimo communications
TW200711349A (en) Method and apparatus for combining space-frequency block coding, spatial multiplexing and beamforming in a MIMO-OFDM system
WO2012057546A3 (ko) 무선랜 시스템에서 데이터 프레임 송수신 방법 및 장치
WO2010093897A3 (en) Method and apparatus for orthogonal pilot tone mapping in multiple-in and multiple-out (mino) and spatial division multiple access ( sdma) systems
ATE546890T1 (de) Mimo-kommunikationssystem mit benutzerkoordination nach reduzierten kanalstatusinformationen
WO2008104907A3 (en) Method and apparatus for selecting pre-coding vectors
WO2011129583A3 (ko) 다중 안테나 지원 무선 통신 시스템에서 효율적인 피드백 방법 및 장치
WO2008024773A3 (en) Approach to a unified su-mimo/mu-mimo operation
MX2010001793A (es) Aparato y metodo para determinar una matriz de precodificacion en un sistema de multiple entrada-multiple salida (mimo).
WO2008116181A3 (en) Variable codebook for mimo system
WO2010002772A3 (en) Method and apparatus for signaling precoding vectors
TW200703966A (en) Systems and methods for beamforming in multi-input multi-output communication systems
TW200944024A (en) Methods and apparatus for controlling transmission of a base station
TW200718063A (en) MIMO-OFDM system and pre-coding and feedback method therein
WO2009057559A1 (ja) ユーザ装置、基地局装置及びｍｉｍｏ伝送制御方法
WO2006076583A3 (en) Rate adaptation using semi-open loop technique
ATE545253T1 (de) Verfahren zur vorkodierung von übertragungssignalen in einem drahtlosen mimo- system
CN101741523B (zh) 多用户多天线系统反馈码字空间距离阈值的有限反馈方法
CN103973350A (zh) 一种多用户传输模式的多用户配对方法

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties