Echo self-interference self-adaption suppression method for broadband wireless full-duplex MIMO communication system

The invention discloses an echo self-interference self-adaption suppression method for a broadband wireless full-duplex MIMO communication system. According to the suppression method, the iterative thought of a self-adaption filtering method is applied to an echo self-interference suppression method, accurate estimation of self-interference signals and promotion of bit error rate performance of the system are achieved through a self-adaption iterative algorithm, and non-ideal fading channel transmission conditions and multi-antenna MIMO system configuration are fully considered to put forward the echo self-interference self-adaption suppression method for the broadband wireless full-duplex MIMO communication system based on a normalized least mean square (NLMS) error algorithm. While the high-intensity self-interference signals can be suppressed significantly, the bit error rate loss of the system is effectively reduced, the transmission capacity of system channels is promoted, the implementation complexity of self-interference suppression is reduced, and the overall comprehensive performance of the wireless full-duplex system is comprehensively improved.