Method for efficiently transmitting signal in multi-antenna wireless communication system and apparatus for same

摘要

The present invention relates to a method for a transmitting end efficiently transmitting a signal in a wireless communication system supporting a multi-antenna and an apparatus for same. More particularly, the method comprises a step of transmitting a downlink signal based on a precoding matrix (W) for an antenna comprising a plurality of antenna elements aligned perpendicularly, wherein the precoding matrix (W) corresponds to a codebook configured so that phase increase is limited with respect to a plurality of precoding vector values populating a same column.

主权项

1. A method transmitting a signal by a transmitting end in a wireless communication system supporting a multi-antenna, the method comprising:
transmitting a downlink signal based on a precoding matrix (W) for an antenna comprising a plurality of antenna elements aligned perpendicularly, wherein the precoding matrix (W) corresponds to a codebook configured so that phase increase is limited with respect to a plurality of precoding vector values populating a same column, wherein the codebook is defined as shown below in Equation A,D(m⁢⁢n)M×M⁢⁢a=1M⁢exp⁡(j(γ⁡(m-1)+(δ-γ)⁢(m-1)⁢(n-1)M⁢⁢a}),[Equation⁢⁢A] wherein m=1,2, . . . , M, n=1,2, . . . , M·a, and
wherein D(mn)M×Ma represents elements of (m, n) in a DFT matrix configuring the codebook,wherein M signifies a number of the plurality of antenna elements, and wherein α signifies an oversampling factor,wherein γ represents a lowermost value in a range of the elevation angle, andwherein δ represents an upper limit value in a range of the elevation angle.