Invention Grant
- Patent Title: Method and apparatus for efficient feedback in a wireless communication system supporting multiple antenna
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Application No.: US14688882Application Date: 2015-04-16
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Publication No.: US09356670B2Publication Date: 2016-05-31
- 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
- Agent Jonathan Kang; Harry Lee
- Priority: KR10-2011-0095682 20110922
- Main IPC: H04B7/02
- IPC: H04B7/02 ; H04B7/04 ; H04B7/06 ; H04L1/00 ; H04L25/03 ; H04L5/00
Abstract:
A method for transmitting channel status information (CSI) via uplink in a wireless communication system includes transmitting a first precoding matrix indicator (PMI) and a second PMI at a subframe. A subsampled codebook for each of a precoding codebook for Rank-1 and a precoding codebook for Rank-2 is determined based on at least the first PMI or the second PMI. In case of the Rank-1 or the Rank-2, a number of elements for the first PMI is 8.
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