CA2707748C - Weighting factor reporting method in a mimo mobile communications system, and base station and user apparatus that are suitable for use in the method - Google Patents

Weighting factor reporting method in a mimo mobile communications system, and base station and user apparatus that are suitable for use in the method Download PDF

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Publication number
CA2707748C
CA2707748C CA2707748A CA2707748A CA2707748C CA 2707748 C CA2707748 C CA 2707748C CA 2707748 A CA2707748 A CA 2707748A CA 2707748 A CA2707748 A CA 2707748A CA 2707748 C CA2707748 C CA 2707748C
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CA
Canada
Prior art keywords
pmi
base station
user apparatus
information
signal
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Active
Application number
CA2707748A
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English (en)
French (fr)
Other versions
CA2707748A1 (en
Inventor
Hidekazu Taoka
Nobuhiko Miki
Kenichi Higuchi
Mamoru Sawahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Docomo Inc
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NTT Docomo Inc
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Publication date
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Publication of CA2707748A1 publication Critical patent/CA2707748A1/en
Application granted granted Critical
Publication of CA2707748C publication Critical patent/CA2707748C/en
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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
    • H04B7/0413—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
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709709—Methods of preventing interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Power Engineering (AREA)
  • Radio Transmission System (AREA)
CA2707748A 2008-01-08 2008-12-26 Weighting factor reporting method in a mimo mobile communications system, and base station and user apparatus that are suitable for use in the method Active CA2707748C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2008-001665 2008-01-08
JP2008001665A JP4652420B2 (ja) 2008-01-08 2008-01-08 ユーザ装置、送信方法、および移動通信システム
PCT/JP2008/073774 WO2009087933A1 (ja) 2008-01-08 2008-12-26 Ｍｉｍｏ方式の移動体通信システムにおける重み係数通知方法、並びにこの方法の使用に好適な基地局およびユーザ装置

Publications (2)

Publication Number Publication Date
CA2707748A1 CA2707748A1 (en) 2009-07-16
CA2707748C true CA2707748C (en) 2016-04-12

Family

ID=40853055

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2707748A Active CA2707748C (en) 2008-01-08 2008-12-26 Weighting factor reporting method in a mimo mobile communications system, and base station and user apparatus that are suitable for use in the method

Country Status (9)

Country Link
US (1) US9130616B2 (enExample)
EP (2) EP2234300B1 (enExample)
JP (1) JP4652420B2 (enExample)
KR (1) KR101525057B1 (enExample)
CN (2) CN101911562B (enExample)
BR (1) BRPI0822233A2 (enExample)
CA (1) CA2707748C (enExample)
RU (2) RU2010130429A (enExample)
WO (1) WO2009087933A1 (enExample)

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* Cited by examiner, † Cited by third party
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DK2351445T3 (en) 2008-10-20 2015-10-26 Interdigital Patent Holdings carrier Aggregation
WO2010148319A1 (en) * 2009-06-19 2010-12-23 Interdigital Patent Holdings, Inc. Signaling uplink control information in lte-a
CN102244566B (zh) * 2010-05-11 2014-03-12 中兴通讯股份有限公司 用于多输入多输出系统的下行传输方法和基站
JP5505676B2 (ja) * 2010-06-18 2014-05-28 日本電気株式会社 無線通信システムにおけるダウンリンク協調マルチポイント送信のためのプリコーディング技法
US8639198B2 (en) * 2010-06-30 2014-01-28 Samsung Electronics Co., Ltd. Systems and methods for 8-TX codebook and feedback signaling in 3GPP wireless networks
WO2012153658A1 (ja) 2011-05-10 2012-11-15 Ｎｅｃカシオモバイルコミュニケーションズ株式会社 移動局装置および通信方法、並びにコンピュータプログラム
JP5753022B2 (ja) * 2011-08-15 2015-07-22 株式会社Ｎｔｔドコモ 無線通信システム、無線基地局装置、ユーザ端末及び無線通信方法
US9735848B2 (en) 2012-10-18 2017-08-15 Kyocera Corporation Mobile communication system and communication control method
EP2938146A4 (en) 2012-12-19 2015-12-30 Fujitsu Ltd RADIO COMMUNICATION DEVICE AND RADIO COMMUNICATION METHOD
WO2017078338A1 (ko) 2015-11-03 2017-05-11 엘지전자 주식회사 무선 통신 시스템에서 채널 상태 보고 방법 및 이를 위한 장치
KR102473191B1 (ko) 2016-03-10 2022-12-02 삼성전자주식회사 안테나를 포함하는 전자 장치
US12126466B2 (en) * 2022-03-09 2024-10-22 Qualcomm Incorporated Channel state feedback using demodulation reference signals

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RU2369017C2 (ru) * 2003-02-18 2009-09-27 Квэлкомм Инкорпорейтед Команды мультиплексирования с кодовым разделением в мультиплексном канале с кодовым разделением
JP2006033306A (ja) * 2004-07-15 2006-02-02 Sony Corp 無線通信装置およびその制御方法
CN1941660A (zh) * 2005-09-30 2007-04-04 松下电器产业株式会社 多天线无线通信系统中的多用户分集方法及系统
WO2007113923A1 (ja) 2006-04-06 2007-10-11 Hitachi Communication Technologies, Ltd. 無線通信システム、無線基地局装置及び無線端末装置
US8498639B2 (en) * 2007-02-09 2013-07-30 Qualcomm Incorporated Flexible channel quality indicator reporting
TW200901655A (en) * 2007-03-21 2009-01-01 Interdigital Tech Corp Method and apparatus for communicating precoding or beamforming information to users in MIMO wireless communication systems
US8290079B2 (en) * 2007-04-19 2012-10-16 Interdigital Technology Corporation Method and apparatus for precoding validation in wireless communications
KR20090130206A (ko) * 2007-04-20 2009-12-18 인터디지탈 테크날러지 코포레이션 Ｍｉｍｏ 통신에 대한 효과적인 프리코딩 정보 검증을 위한 방법 및 장치
US20080305745A1 (en) * 2007-06-05 2008-12-11 Interdigital Technology Corporation Method and apparatus for supporting uplink transmission of channel quality and coding information in a wireless communication system
US8325852B2 (en) * 2007-06-08 2012-12-04 Samsung Electronics Co., Ltd. CDD precoding for open loop SU MIMO
JP4729537B2 (ja) * 2007-06-19 2011-07-20 株式会社エヌ・ティ・ティ・ドコモ 基地局装置および送信方法
US8630184B2 (en) * 2007-08-15 2014-01-14 Qualcomm Incorporated Uplink control channel format
KR101476202B1 (ko) * 2008-01-08 2014-12-24 엘지전자 주식회사 주기적/비주기적 채널상태정보 송수신 방법
CN101217304B (zh) * 2008-01-10 2013-01-30 北京邮电大学 一种多子信道的多输入多输出预编码处理方法

Also Published As

Publication number Publication date
CN103354464B (zh) 2016-12-28
US20110013719A1 (en) 2011-01-20
JP4652420B2 (ja) 2011-03-16
US9130616B2 (en) 2015-09-08
EP2811661B1 (en) 2016-07-20
EP2811661A1 (en) 2014-12-10
CN101911562B (zh) 2013-08-21
CN101911562A (zh) 2010-12-08
RU2012142555A (ru) 2014-04-20
EP2234300A4 (en) 2014-07-09
EP2234300B1 (en) 2015-10-21
RU2521614C2 (ru) 2014-07-10
RU2010130429A (ru) 2012-02-20
BRPI0822233A2 (pt) 2015-06-23
CN103354464A (zh) 2013-10-16
KR20100097187A (ko) 2010-09-02
KR101525057B1 (ko) 2015-06-18
JP2009164975A (ja) 2009-07-23
EP2234300A1 (en) 2010-09-29
CA2707748A1 (en) 2009-07-16
WO2009087933A1 (ja) 2009-07-16

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