关键词: 毫米波通信, 部分连接结构, 混合预编码, 交替最小化, 有序右奇异向量

Abstract:

In order to improve the efficiency of the hybrid precoding spectrum in millimeter wave systems, it is considered the alternative minimization scheme to improve the beam forming gain. However, this architecture is non-convex constrained due to the fact that radio frequency domain phase modulating networks are usually constructed using phase shifters, and the solution is known to have higher computational complexity. Before using the alternating minimization architecture, it is proved that the phase angle of the ordered right singular vector of the channel matrix can be used to initialize the analog precoder, thus avoiding the complex optimization process of searching the approximate optimal analog precoder matrix. In addition, the antenna array response vectors at the transmitter are not required. The simulation results show that the proposed algorithm has better performance and lower complexity than the traditional partially connected algorithm, especially in the case of high signal-to-noise ratio.

Key words: millimeter-wave communication, partially connected structure, hybrid precoding, alternate minimization, ordered right singular vector