Energy-efficient hybrid precoding based on successive interference cancelation for millimeter-wave massive MIMO systems

Millimeter-wave massive MIMO usually utilizes the hybrid precoding to overcome the serious signal attenuation, where only a small number of RF chains is required. However, most of hybrid precoding schemes consider the complicated full-connected architecture. In this paper, we focus on the more energy-efficient sub-connected architecture, and propose a low-complexity hybrid precoding based on successive interference cancelation (SIC). The basic idea of SIC-based hybrid precoding is to decompose the total capacity optimization problem into a series of sub-problems, each of which only considers one sub-antenna array. Then, we can optimize the capacity of each sub-antenna array one by one until the last sub-antenna array is considered. Simulation results verify that SIC-based hybrid precoding can achieve the near-optimal performance.