Patent ID: 8861634
Filing Date: 2014-10-14
Classification: H04B

Abstract:
1. A transmission device in a wireless communication system, the transmission device comprising: a layer mapper to map a codeword to one or more layers; and a precoder to precode symbols mapped by the layer mapper, by using an n*n precoding matrix matched with an input precoding matrix indicator among n*n precoding matrixes included in a codebook for an n*n Multi Input Multi Output (MIMO), which includes the n*n precoding matrixes obtained by combining 4*4 precoding matrixes included in a codebook for a 4*4 MIMO, wherein the codebook for the n*n MIMO includes preceding matrixes obtained by combining the 4*4 preceding matrixes in such a manner as to multiply each of the 4*4 precoding matrixes included in the codebook for the 4*4 MIMO by an (n/4)