Apparatus and method for supporting cooperative multiplexing in multiple antenna system

An apparatus for supporting cooperative multiplexing in a multi-antenna system and a method therefor are provided to enable receivers used for cooperative reception to restore signals to be retransmitted, and then retransmit the signals after eliminating noise, thus a destination receiver can receive the signals without any noise. Restorers(623,633) restore reception signals by being supplied with detection signals of cooperative receivers(601,603,605) having lower indexes. Eliminators eliminate the restored signals from signals which are received from a transmitter. Detectors(613,627,637) are supplied with outputted signals of the eliminators, and modulate/decode the supplied signals to detect data signals.