毫米波分离型子阵列的低复杂度混合波束成型传输设计

为了增强毫米波传输的系统性能及扩大其覆盖范围，数模混合（大规模）多输入多输出（MIMO）传输技术得到了广泛关注。本文针对分离型子阵列混合波束成型架构的毫米波通信系统，研究了基于码本的低复杂度优化子阵列波束控制矢量算法。采用交替优化方法及干扰对齐思想，本文提出了一种双向交替优化设计各收发子阵列的波束控制矢量算法。所提出的算法具有收敛速度快，计算复杂度低的特点。数值仿真结果表明，基于该算法设计的分离型子阵列混合波束成型传输方案的有效性及复杂度低的优越性。 

Low Complexity Hybrid Beamforming Transmission Design for Millimeter Wave Split Sub-arrays

In order to enhance the system performance and expand the coverage of millimeter wave transmission, hybrid digital and analog (large-sale) multiple input multiple output (MIMO) transmission technology has been widely concerned. This paper considered millimeter wave communication systems with split sub-arrays hybrid beamforming architecture and researched a kind of algorithm for optimization of beam steering vectors with low complexity based on codebooks. A method for two-way alternating optimization on beam steering vector of each antenna sub-array both at the transmitter and at the receiver was proposed, which adopted by the approach of alternating optimization and the idea of interference alignment. The proposed algorithm has the characteristics of fast convergence rate and low computational complexity. The result turns out the validity and the advantages over low complexity of the split sub-arrays hybrid beamforming transmission based on proposed algorithm.