BASE STATION APPARATUS, WIRELESS COMMUNICATION SYSTEM, TRANSMISSION METHOD OF BASE STATION APPARATUS, AND TRANSMISSION PROGRAM

摘要

This invention allows a plurality of terminal apparatuses using different transmission systems and/or different access systems to be spatially multiplexed at the same time by use of multi-user MIMO using linear and nonlinear precodings. A multi-user MIMO signal generating unit (205) performs, based on CSIs of the terminal apparatuses acquired by a CSI acquiring unit (216), signal processings of a modulated symbol addressed to a first terminal apparatus and a modulated symbol addressed to a second terminal apparatus, and generates multi-user MIMO symbols, which are for respective antennas in an antenna unit (214) used for transmission, for respective frequency components corresponding to the subcarriers of a multicarrier transmission. Pilot multiplexing units (206, 207) multiplex pilot signals, which are to be transmitted from the respective antennas in the antenna unit (214), with the respective multi-user MIMO symbols that are to be transmitted from the respective antennas.