METHOD FOR TRANSMITTING PRECODING MATRIX INFORMATION AND USER DEVICE, AND METHOD FOR TRANSMITTING DATA TO PLURALITY OF USER DEVICES AND BASE STATION

摘要

The present invention relates to a precoding matrix information transmission method and a user device, and provides a method for transmitting precoding matrix information by a particular user device among a plurality of user devices that receive a signal transmitted from one base station. The method comprises the steps of: determining, from a predetermined codebook, a first precoding matrix which is a precoding matrix for the particular user device during signal reception, and determining one or more second precoding matrices for the other user devices which are to be multiplexed in a predetermined resource region with the particular user device, wherein the one or more second precoding matrices are determined within a codebook subset of the predetermined codebook linked with the first precoding matrix; and a precoding matrix information transmission step of transmitting, to the base station, first precoding matrix information that indicates the first precoding matrix and second precoding matrix information that indicates the one or more second precoding matrices.