Invention Grant
US09209883B2 Method and apparatus for performing efficient feedback in wireless communication system supporting multiple antenna
有权
用于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
- Patent Title: Method and apparatus for performing efficient feedback in wireless communication system supporting multiple antenna
- Patent Title (中): 用于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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Application No.: US14528728Application Date: 2014-10-30
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Publication No.: US09209883B2Publication Date: 2015-12-08
- Inventor: Hyunsoo Ko , Sunam Kim , Dongguk Lim , Moonil Lee , Jaehoon Chung
- Applicant: LG ELECTRONICS INC.
- Applicant Address: KR Seoul
- Assignee: LG ELECTRONICS INC.
- Current Assignee: LG ELECTRONICS INC.
- Current Assignee Address: KR Seoul
- Agency: Lee, Hong, Degerman, Kang & Waimey
- Priority: KR10-2011-0095683 20110922
- Main IPC: H04B7/06
- IPC: H04B7/06 ; H04L1/00 ; H04L5/00 ; H04L25/03 ; H04W48/08 ; H04W72/00
Abstract:
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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