TWO-WAY COMMUNICATION SYSTEM AND METHOD FOR MULTIUSER

摘要

The present invention provides a base station and a method supporting two-way communications for multiple users. The base station supporting the two-way communications for the users according to an embodiment of the present invention comprises: a transmitter connected to multiple antennas which transmit downlink signals to each user and applying a precoding matrix to the downlink signals; and a receiver connected to multiple antennas which receive uplink signals from the each user and applying a beam forming filter to the uplink signals, wherein the precoding matrix includes a self interference alignment matrix which aligns multiple self interference signals, caused by the transmission of the downlink signals during the reception of the uplink signals as the reception of the uplink signals and the transmission of the downlink signals are simultaneously realized, to a specific sub-space predefined in relation to the receiver and the beam forming filter includes a self interference removing filter formed of a null space of the specific sub-space.