RIS-assisted multi-user interference suppression method based on fast continuous upper bound minimization method

The invention discloses an RIS-assisted multi-user interference suppression method based on a fast continuous upper bound minimization method, and relates to the technical field of communication, and the method comprises the steps: a user exchanges information through a reconfigurable intelligent surface, and constructs and solves a problem of RIS element configuration under the constraint of a constant modulus; reconstructing the problem of solving the RIS element configuration into a quadratic cost function with constant modulus constraint, then searching for a proxy function for the quadratic cost function with constant modulus constraint, and obtaining a suboptimal solution through a continuous upper bound minimization algorithm; carrying out square iteration acceleration summation on the suboptimal solution obtained through the continuous upper bound minimization algorithm to obtain a solution about the RIS element configuration problem; rIS element information is configured, and a user can exchange info