FULL-DUPLEX COMMUNICATION EQUIPMENT FOR CANCELLING SELF-INTERFERENCE AND METHOD FOR CANCELLING SELF-INTERFERENCE

摘要

The present invention provides a full-duplex communication terminal capable of cancelling self-interference and a self-interference cancelling method thereof, wherein the full-duplex communication terminal comprises: a plurality of antennas; a plurality of transmitters discriminating a first mode and a second mode according to sections where a power amplifier is operated with linear and nonlinear characteristics to output amplified transmission signals to the plurality of antennas, whereas performing precedent compensation at a digital signal level according to a preceding compensation function with respect to the nonlinear characteristics of the power amplifier in the second mode to output transmission signals; and a plurality of receivers receiving reception symbols digitally converted from reception signals received through the plurality of antennas and transmission symbols digitally modulated from transmission data of the transmitters, estimating a first self-interference channel gain to obtain a first reconfigured self-interference signal using the reception symbols and the transmission symbols based on the linearity of a self-interference signal in the first mode, alternately and repetitively estimating a second self-interference channel gain and a preceding compensation coefficient from the reception symbols and the transmission symbols precedingly compensated and transmitted in the second mode, and the first self-interference channel gain, and obtaining a preceding compensation function according to the preceding compensation coefficient to the preceding compensation function to the transmitters.