发明申请
- 专利标题： METHOD AND APPARATS FOR PERFORMING EFFICIENT FEEDBACK IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNA
- 专利标题（中）： 在支持多个天线的无线通信系统中执行有效反馈的方法和装置
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申请号： US13243852申请日： 2011-09-23
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公开(公告)号： US20120076023A1公开(公告)日： 2012-03-29
- 发明人: Hyunsoo Ko , Sunam Kim , Dongguk Lim , Moonil Lee , Jaehoon Chung
- 申请人： Hyunsoo Ko , Sunam Kim , Dongguk Lim , Moonil Lee , Jaehoon Chung
- 专利权人： LG ELECTRONICS INC.
- 当前专利权人： LG ELECTRONICS INC.
- 优先权： KR10-2011-0095683 20110922
- 主分类号： H04W24/00
- IPC分类号： H04W24/00 ; H04W72/06 ; H04L12/26
摘要：
A method for transmitting channel status information (CSI) of downlink transmission via uplink in a wireless communication system includes transmitting a rank indicator (RI) and a precoder type indicator (PTI) at a first subframe, transmitting at a second subframe a first precoding matrix indicator (PMI) when the PTI has a first value and transmitting a second PMI and a wideband channel quality indicator (WB CQI) when the PTI has a second value, and transmitting at a third subframe a second PMI and a WB CQI when the PTI has a first value and transmitting a subband (SB) CQI and a second PMI when the PTI has a second value. A user equipment (UE) preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. Subsampled codebooks of precoding codebooks of individual Rank-2, Rank-3 and Rank-4 are applied to the second PMI.
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