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

摘要

According to the present invention, a plurality of antennas and power amplifiers are divided into a first mode and a second mode according to a section in which linear and nonlinear characteristics are operated to output amplified transmission signals to a plurality of antennas. Pre-compensate the characteristics at the digital signal level according to the pre-compensation function to receive the transmission symbol that digitally converts the received signal received through the multiple transmitters and multiple antennas and the transmission symbol that digitally modulates the transmission data from the transmitter. Received, estimates the first self-interference channel gain using the received and transmitted symbols based on the linearity of the self-interference signal in the first mode, obtains the first reconstructed self-interference signal, and is pre-compensated and transmitted in the second mode From the received symbol and the transmitted symbol and the first self-interference channel gain, the second self-interference channel gain and the preceding compensation coefficient It is possible to provide a full-duplex communication terminal and a method for canceling self-interference, including a plurality of receivers that alternately estimate iteratively and obtain the preceding compensation function according to the preceding compensation coefficient and transmit it to the transmitter.