Double-RIS-assisted MU-MIMO beamforming method and system based on energy efficiency maximization

The invention discloses a double-RIS-assisted MU-MIMO beam forming method and system based on energy efficiency maximization, and relates to the technical field of beam forming design in an RIS-assisted communication system, and the method comprises the steps: building a double-RIS-assisted MU-MIMO communication system model; designing a system energy efficiency optimization problem, dividing the optimization problem into a plurality of sub-problems, and performing joint optimization on implementation parameters; and determining implementation parameters to realize the optimal energy efficiency of the double-RIS-assisted MU-MIMO system. According to the method, aiming at a double-RIS-assisted MU-MIMO system scene, base station transmitting power consumption and user service quality requirements are comprehensively considered, and system energy efficiency optimization is realized through reasonable design of RIS 1 and RIS 2 reflection coefficients, base station transmitting beam forming parameters and user rec