Hybrid precoding design based on successive interference cancellation and alternating direction multiplier method

In order to solve the high-power consumption problem due to a huge number of phase shifters (PS) in millimetre wave antenna systems, the latest energetic connection is intended. There are hybrid precoding schemes, one of which is successive interference cancellation-alternating direction multiplier (SIC-ADMM) and another one is successive interference cancellation (SIC), that are proposed to maximize spectrum efficiency. SIC decomposes the total rate problem into the different RF links. The analog part is first iterated successively and converted into a low-dimensional equivalent matrix, and then the digital part is solved. SIC-ADMM is an improvement on SIC. By studying multivariable sub-rate problems, the algorithm can converge quickly and effectively reduce the computational complexity. Simulation results show that the proposed scheme is superior to the existing typical precoding schemes in terms of spectrum efficiency and energy efficiency. Additionally, when an assured proportion of PS is turned off, By giving up a small percentage of spectrum efficiency, the proposed strategy can greatly increase energy efficiency.