Invention Grant
US09363000B2 Signal transmission method and apparatus using codebook in wireless communication system supporting multiple antennas
有权
信号传输方法和装置,在支持多个天线的无线通信系统中使用码本
- Patent Title: Signal transmission method and apparatus using codebook in wireless communication system supporting multiple antennas
- Patent Title (中): 信号传输方法和装置,在支持多个天线的无线通信系统中使用码本
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Application No.: US14310174Application Date: 2014-06-20
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Publication No.: US09363000B2Publication Date: 2016-06-07
- Inventor: Hyun Soo Ko , Jae Hoon Chung , Seung Hee Han , Moon Il Lee
- 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 & Walmey
- Agent Jonathan Kang; Michael Monaco
- Main IPC: H04L27/00
- IPC: H04L27/00 ; H04B7/04 ; H04B7/06 ; H04L25/03 ; H04L27/26 ; H04W72/02

Abstract:
The present invention relates to a method for transmitting, by a base station, a downlink signal using a plurality of transmission antennas comprises the steps of: applying a precoding matrix indicated by the PMI, received from a terminal, in a codebook to a plurality of layers, and transmitting the precoded signal to the terminal through a plurality of transmission antennas. Among precoding matrices included in the codebook, a precoding matrix for even number transmission layers can be a 2×2 matrix containing four matrices (W1s), the matrix (W1) having rows of a number of transmission antennas and columns of half the number of transmission layers, the first and second columns of the first row in the 2×2 matrix being multiplied by 1, the first column of the second row being multiplied by coefficient “a” of a phase, and the first column of the second row being multiplied by “−a”.
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