MULTI-ANTENNA RECEIVING APPARATUS, MULTI-ANTENNA RECEIVING METHOD, MULTI-ANTENNA TRANSMITTING APPARATUS, AND MULTI-ANTENNA COMMUNICATION SYSTEM

摘要

Soft decision parts (503,506) perform temporary decisions of modulated signals (502,505) as separated by a separating part (501) using an inverse matrix calculation of a channel scatter matrix. Signal point reduction parts (508,510,514,516) use the temporary decision results (504,507) to reduce the number of candidate signal points of multiplexed modulated signals. Soft decision parts (512,518) use the candidate signal points as reduced to perform precise decisions, thereby obtaining reception data of the modulated signals (RA,RB). In this way, a smaller number of calculations is used to successfully obtain the reception data (RA,RB) having an improved error rate characteristic without degradation of the data transmission efficiency.