基本信息:
- 专利标题： 다중 안테나 지원 무선 통신 시스템에서 효율적인 피드백 방법 및 장치
- 专利标题（英）：METHOD AND APPARATUS FOR EFFICIENT FEEDBACK IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS
- 申请号：PCT/KR2011/007057 申请日：2011-09-26
- 公开(公告)号：WO2012039591A3 公开(公告)日：2012-03-29
- 发明人： 고현수 , 김수남 , 임동국 , 이문일 , 정재훈
- 申请人： 엘지전자 주식회사 , 고현수 , 김수남 , 임동국 , 이문일 , 정재훈
- 申请人地址： 서울 영등포구 여의도동 20, 150-721 Seoul KR
- 专利权人： 엘지전자 주식회사,고현수,김수남,임동국,이문일,정재훈
- 当前专利权人： 엘지전자 주식회사,고현수,김수남,임동국,이문일,정재훈
- 当前专利权人地址： 서울 영등포구 여의도동 20, 150-721 Seoul KR
- 代理机构： 김용인
- 优先权： US61/386,552 20100926; US61/390,110 20101005; US61/411,920 20101110; US61/413,951 20101115; US61/414,372 20101116; US61/414,374 20101116; KR10-2011-0095680 20110922
- 主分类号： H04B7/04
- IPC分类号： H04B7/04 ; H04L27/26 ; H04L1/06
The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for efficient feedback in a wireless communication system that supports multiple antennas. According to one embodiment of the present invention, a method for transmitting channel state information for a downlink transmission via an uplink in a wireless communication system comprises the following steps: transmitting a joint-coded rank indicator (RI) and a wideband first precoding matrix indicator (PMI) in a first subframe; and transmitting a wideband channel quality indicator (CQI) and a wideband second PMI in a second subframe. The precoding matrix preferred by a terminal is indicated by a combination of the first PMI and the second PMI, and if the RI is rank 1 or rank 2, the first PMI may have a value which represents one of subsets constituted by eight indices from among a total of sixteen indices of a precoding codebook for a first PMI.