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WO2012008710A3 - 무선 통신 시스템에서 코드북을 이용한 신호 송수신 방법 및 장치 - Google Patents

무선 통신 시스템에서 코드북을 이용한 신호 송수신 방법 및 장치 Download PDF

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Publication number
WO2012008710A3
WO2012008710A3 PCT/KR2011/004973 KR2011004973W WO2012008710A3 WO 2012008710 A3 WO2012008710 A3 WO 2012008710A3 KR 2011004973 W KR2011004973 W KR 2011004973W WO 2012008710 A3 WO2012008710 A3 WO 2012008710A3
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WIPO (PCT)
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signal
pmi
matrix
transmitting
wireless communication
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Ceased
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PCT/KR2011/004973
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English (en)
French (fr)
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WO2012008710A2 (ko
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김형태
김기준
이대원
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LG Electronics Inc
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LG Electronics Inc
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Priority to US13/808,544 priority Critical patent/US8938020B2/en
Priority to KR1020127031783A priority patent/KR101832766B1/ko
Publication of WO2012008710A2 publication Critical patent/WO2012008710A2/ko
Publication of WO2012008710A3 publication Critical patent/WO2012008710A3/ko
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/0031—Multiple signaling transmission
    • 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
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • 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
    • H04B1/62—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 for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • 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
    • H04B7/0452—Multi-user MIMO 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
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • H04B7/0481—Special codebook structures directed to feedback optimisation using subset selection of codebooks
    • 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
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • H04B7/0613—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
    • H04B7/0645—Variable feedback
    • H04B7/065—Variable contents, e.g. long-term or short-short
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/09—Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
    • 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
    • H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
    • H04B7/0469—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking special antenna structures, e.g. cross polarized antennas into account
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

본 발명은 무선 통신 시스템에 대한 것으로, 보다 구체적으로는 코드북을 이용한 신호 송수신 방법 및 장치가 개시된다. 본 발명의 일 실시예에 따른 상기의 기술적 과제를 해결하기 위하여 본 발명의 일 실시예에 따른 Nt 개의 안테나를 지원하는 송신기에서 신호를 수신기에게 전송하는 방법은, 제 1 프리코딩행렬지시자(PMI) 및 제 2 PMI 의 조합에 의해서 지시(indicate)되는 프리코딩 행렬을 선택하는 단계; 상기 선택된 프리코딩 행렬을 이용하여 상기 신호를 프리코딩하는 단계; 및 상기 프리코딩된 신호를 상기 Nt 개의 안테나를 통하여 전송하는 단계를 포함할 수 있다. 여기서, 상기 제 1 PMI 는 상기 Nt 개의 안테나와 관련된 채널 방향을 나타내는 행렬들로 구성된 N 개 (N≥1) 의 행렬 그룹 중에서 하나의 행렬 그룹을 지시할 수 있다. 또한, 상기 프리코딩 행렬은, 상기 제 1 PMI 에 의해 지시되는 상기 하나의 행렬 그룹에 상기 제 2 PMI에 의해 지시되는 행렬이 곱해짐으로써 선택될 수 있다.
PCT/KR2011/004973 2010-07-12 2011-07-07 무선 통신 시스템에서 코드북을 이용한 신호 송수신 방법 및 장치 Ceased WO2012008710A2 (ko)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/808,544 US8938020B2 (en) 2010-07-12 2011-07-07 Method and device for transmitting/receiving a signal by using a code book in a wireless communication system
KR1020127031783A KR101832766B1 (ko) 2010-07-12 2011-07-07 무선 통신 시스템에서 코드북을 이용한 신호 송수신 방법 및 장치

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US36363110P 2010-07-12 2010-07-12
US36328210P 2010-07-12 2010-07-12
US36328310P 2010-07-12 2010-07-12
US61/363,282 2010-07-12
US61/363,283 2010-07-12
US61/363,631 2010-07-12
US36400310P 2010-07-13 2010-07-13
US61/364,003 2010-07-13

Publications (2)

Publication Number Publication Date
WO2012008710A2 WO2012008710A2 (ko) 2012-01-19
WO2012008710A3 true WO2012008710A3 (ko) 2012-05-03

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US (1) US8938020B2 (ko)
KR (1) KR101832766B1 (ko)
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Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011002132A1 (en) * 2009-06-29 2011-01-06 Lg Electronics Inc. Method for receiving data in multi input multi output
EP2445131B1 (en) * 2010-06-17 2016-02-10 Panasonic Intellectual Property Corporation of America Pre-coding method and transmitter
CN102082637B (zh) * 2010-09-16 2015-03-25 电信科学技术研究院 一种码本子集约束的处理方法及设备
SG196763A1 (en) * 2012-08-03 2014-02-13 Agency Science Tech & Res A method for determining precoding matrixes for communication and a system therefrom
CN103780331B (zh) * 2012-10-19 2017-08-18 电信科学技术研究院 传输编码指示信息和确定预编码矩阵的方法、系统及设备
CN103780332B (zh) 2012-10-19 2017-03-29 电信科学技术研究院 传输编码指示信息和确定预编码矩阵的方法、系统及设备
EP2739107B1 (en) * 2012-11-28 2019-01-02 Samsung Electronics Co., Ltd Method and apparatus for performing communication in a wireless communication system
KR102117024B1 (ko) 2012-11-28 2020-06-01 삼성전자 주식회사 무선 통신 시스템의 통신 방법 및 장치
EP2945300B1 (en) * 2013-01-09 2019-12-11 LG Electronics Inc. Method and device for transmitting and receiving signals by using codebook in wireless communication system
CN110212958B (zh) * 2013-05-21 2021-03-26 上海朗帛通信技术有限公司 一种移动通信系统中的信道信息反馈方法和装置
WO2014189206A1 (ko) * 2013-05-23 2014-11-27 엘지전자 주식회사 무선 통신 시스템에서 채널 상태 정보 보고 방법 및 장치
CN110266353B (zh) * 2013-07-05 2022-03-22 株式会社Ntt都科摩 终端、基站、发送方法及预编码矩阵的确定方法
CN104579586B (zh) * 2013-10-22 2018-03-20 电信科学技术研究院 信道状态信息的反馈方法和装置、以及接收方法和装置
US9287948B2 (en) * 2014-05-11 2016-03-15 Lg Electronics Inc. Method and apparatus for receiving downlink wireless signal
US20160072562A1 (en) * 2014-09-10 2016-03-10 Samsung Electronics Co., Ltd. Channel state information reporting with basis expansion for advanced wireless communications systems
JP6418334B2 (ja) * 2014-10-29 2018-11-07 日本電気株式会社 通信システム及び方法、基地局、及びユーザ端末
BR112018003565A2 (pt) * 2015-08-24 2018-09-25 Huawei Tech Co Ltd método e aparelho para enviar informação de pré-codificação e retornar informação de pré-codificação, sistema, meio de armazenamento legível por computador e produto de programa de computador
CN106487435B (zh) 2015-08-24 2020-03-03 电信科学技术研究院 一种传输编码指示信息和确定预编码矩阵的方法和装置
CN106936484B (zh) * 2015-12-28 2020-03-24 电信科学技术研究院 一种上行信息反馈和下行数据传输方法和设备
CN110034797B (zh) 2016-04-01 2020-06-26 华为技术有限公司 一种预编码矩阵指示的反馈方法及装置
US10044423B2 (en) 2016-10-20 2018-08-07 Samsung Electronics Co., Ltd System and method for precoder selection in multiple-input multiple-output (MIMO) systems with discrete fourier transform (DFT)-based codebook
CN110545130B (zh) * 2016-11-04 2020-08-07 华为技术有限公司 信道状态信息接收方法、用户设备和网络设备
CN110581724B (zh) * 2018-06-08 2020-11-06 电信科学技术研究院有限公司 信道状态信息反馈方法、预编码矩阵确定方法及装置
US11438041B2 (en) * 2018-08-03 2022-09-06 Nec Corporation Methods and devices for reducing channel state information feedback overhead
KR102155204B1 (ko) * 2018-11-01 2020-09-11 한양대학교 산학협력단 5g 이동통신에서 무상관 빔을 이용한 그룹 기반 빔 보고 방법 및 장치
CN117792445A (zh) * 2022-09-27 2024-03-29 中国移动通信有限公司研究院 信息指示方法、装置、设备及可读存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080083556A (ko) * 2007-03-12 2008-09-18 엘지전자 주식회사 다중 안테나 시스템에서의 제어정보 전송방법
KR20090017352A (ko) * 2007-08-14 2009-02-18 엘지전자 주식회사 다중 안테나 시스템에서 피드백 방법 및 코드북 구성 방법
KR20090073758A (ko) * 2007-12-31 2009-07-03 엘지전자 주식회사 협동 다중 입출력 통신 시스템에서, 프리코딩된 신호를송신하는 방법
KR20090083834A (ko) * 2008-01-30 2009-08-04 엘지전자 주식회사 다중안테나 시스템에서 프리코딩 정보 전송방법

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8442140B2 (en) * 2008-09-25 2013-05-14 Samsung Electronics Co., Ltd. Method of designing codebook for network multiple input multiple output communication system and method of using the codebook
US8983397B2 (en) * 2008-10-10 2015-03-17 Qualcomm Incorporated Method and apparatus for channel feedback by multiple description coding in a wireless communication system
US8599751B2 (en) * 2009-09-14 2013-12-03 Samsung Electronics Co., Ltd. Clustered multi-cell multi-user multiple input multiple output communication system using cell-edge user selection scheme
KR101817724B1 (ko) * 2010-04-30 2018-02-21 삼성전자주식회사 각 리포팅 모드에 대응하는 코드북을 사용하는 다중 입출력 통신 시스템
US8509338B2 (en) * 2010-05-05 2013-08-13 Motorola Mobility Llc Method and precoder information feedback in multi-antenna wireless communication systems
WO2011155763A2 (ko) * 2010-06-08 2011-12-15 엘지전자 주식회사 협력 멀티 포인트 통신 시스템에서 채널상태정보 송수신 방법 및 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080083556A (ko) * 2007-03-12 2008-09-18 엘지전자 주식회사 다중 안테나 시스템에서의 제어정보 전송방법
KR20090017352A (ko) * 2007-08-14 2009-02-18 엘지전자 주식회사 다중 안테나 시스템에서 피드백 방법 및 코드북 구성 방법
KR20090073758A (ko) * 2007-12-31 2009-07-03 엘지전자 주식회사 협동 다중 입출력 통신 시스템에서, 프리코딩된 신호를송신하는 방법
KR20090083834A (ko) * 2008-01-30 2009-08-04 엘지전자 주식회사 다중안테나 시스템에서 프리코딩 정보 전송방법

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