WIRELESS TRANSMISSION DEVICE, MOBILE STATION DEVICE, AND PRE-CODING METHOD

摘要

Disclosed is a wireless transmission device that improves the drastic degradation of data throughput in a single carrier frequency division multiple access (SC-FDMA) transmission.  A multiplexer (132) multiplies a stream (S1) and another stream (S2) by a pre-coding matrix, thereby multiplexing by differentiating an inter-stream power ratio.  A code book (131) has candidates for a plurality of pre-coding matrices corresponding to a plurality of power ratios differentiating the inter-stream power ratio and sets the pre-coding matrix from among the candidate matrices.  This makes it possible to suppress the degradation of cubic metric (CM) after application of pre-coding, so that it is possible to improve the drastic degradation of data throughput when the pre-coding is applied.