Radio base station apparatus, mobile station apparatus and wireless communication method

摘要

This invention provides a radio base station apparatus and a wireless communication method wherein a downstream reference signal arrangement suitable for conversion to virtual antennas can be used to perform wireless communications. A radio base station apparatus (200) produces a plurality of transmission antennas, CRS to be used for demodulating at least downstream control information, CQI-RS to be used for determining a channel quality for each of the transmission antennas, and DM-RS to be used for demodulating downstream transmitted data for each of a plurality of streams, and then multiplexes the CRS, CQI-RS and DM-RS in the same transmission time unit for transmission via the antennas.