RIS-assisted multi-user interference suppression method based on accelerated coordinate descent method

The invention discloses an RIS-assisted multi-user interference suppression method based on an accelerated coordinate descent method, and relates to the technical field of communication, and the method comprises the steps: constructing a signal model for a user to exchange information through a reconfigurable intelligent surface, and constructing and solving the problem of RIS element configuration under the constraint of a constant modulus based on the signal model; reconstructing the problem of solving the RIS element configuration into a quadratic cost function with constant modulus constraint, and then converting the quadratic cost function with constant modulus constraint into a decomposable problem with a plurality of one-dimensional sub-problems; and solving the decomposable problem with the plurality of one-dimensional sub-problems to obtain a solution of the problem for solving the RIS element configuration. Compared with an existing method, mutual interference of multiple users can be more effective