Intelligent reflector in-band interference suppression method under discrete reflection coefficient constraint

The invention discloses an intelligent reflecting surface in-band interference suppression method under discrete reflection coefficient constraint, which comprises the following steps: establishing a in-band interference suppression equipment system, sending a signal to a receiver by a transmitter, sending an interference signal to the receiver by a jammer, and obtaining a phase shift model of an nth reflecting element on an intelligent reflecting surface, and a reflection coefficient of the nth reflective element; re-representing the signal model received by the receiver; obtaining the received interference signal and useful signal power, minimizing the received interference power under the condition that the useful signal power is not suppressed, and obtaining an interference minimization model; converting the optimal solution of the relaxation model into a reflection coefficient capable of suppressing interference; the reflection coefficient design method provided by the invention aims at more general disc