BASE STATION, COMMUNICATION TERMINAL APPARATUS, AND DATA DETECTING METHOD IN MIMO SYSTEM

摘要

A base station wherein the orthogonal projection matrix of an interference user channel is fed back to improve the error performance in a downstream line of MIMO system. In the present apparatus, a receiving part (200) receives a TDD-MIMO-CDMA signal. A channel estimating part (201) estimates the channel matrixes of all users. An orthogonal projection matrix acquiring part (202) calculates the orthogonal projection matrix (M) of the interference user matrix of each user. An orthogonal projection matrix feedback part (203) periodically transmits, to each user, the orthogonal projection matrix (M) of the user.