Patent ID: 8964870
Filing Date: 2015-02-24
Classification: H04B,H04L,H04W

Abstract:
1. A mobile station apparatus configured to define a channel matrix corresponding to a channel transmission path suitable for MU-MIMO transmission using a plurality of precoding matrixes defined in a codebook suitable for SU-MIMO transmission and a plurality of adjustment coefficients to respectively adjust the plurality of precoding matrixes, comprising: a selection section configured to define the channel matrix as a linear coupling vector of adjusted vectors obtained by adjusting the lengths of the plurality of precoding vectors defined in the codebook suitable for SU-MIMO transmission by the adjustment coefficients and select the plurality of precoding matrixes and/or the plurality of adjustment coefficients used in generation of the thus defined channel matrix; and a transmission section configured to transmit the plurality of precoding matrixes and/or the plurality of adjustment coefficients selected in the selection section to a base station apparatus as channel information suitable for MU-MIMO transmission.