Power factorization based hybrid precoding design for millimeter wave MIMO transmitters using sub-array structure

摘要

Coupled with large multiple-input multiple-output (MIMO) techniques, Millimeter Wave (mmWave) communication systems are able to boost capacity and deliver a huge data rate. Hence, a fully digital processing becomes impractical with mmWave MIMO systems. Unfortunately, these systems require a prohibitively high hardware cost and power consumption. In order to overcome these limitations, various hybrid precoding architectures have been recently proposed accomplishing the MIMO processing in an analog and digital domain mixture based on different array mappings. In this paper, we introduce the sub-array structure that efficiently designs hybrid precoders and combiners. We propose a hybrid precoding design based on power factorization (HP-PF) algorithm which provides a trade-off between complexity and system performance. When our proposal is compared with previous methods in the literature, simulation results show that the proposed solution provides an important reduction in terms of computational complexity while maintaining performance gains in terms of spectral efficiency slightly comparable to that of the semidefinite relaxation (SDR) based algorithm.