论文标题
混合编码用于混合使用相位变速器和开关的混合编码大量mimo
Hybrid Precoding for Mixture Use of Phase Shifters and Switches in mmWave Massive MIMO
论文作者
论文摘要
提议用于混合使用相位变速器和开关的混合编码的可变相变（VPS）体系结构，建议用于毫米波大量多输入多输出通信。对于VPS体系结构，提出了一种称为VPS-HPD的混合预编码设计（HPD）方案，该方案通过交替优化模拟预编码器和数字预码器来根据通道状态信息来优化阶段。为了降低VPS-HPD方案的计算复杂性，然后提出了VPS体系结构（VPS-LC-HPD）的低复杂性HPD方案，包括在三个阶段中进行交替优化，每个阶段都具有封闭形式的解决方案并可以有效地实现。为了降低大量开关引入的硬件复杂性，我们考虑了一个相互连接的VPS体系结构并提出了HPD方案，其中HPD问题分为多个独立的子问题，每个子问题由VPS-HPD或VPS-LC-LC-LC-HPD方案灵活地求解。仿真结果验证了提出方案的有效性，并表明所提出的方案可以通过降低计算复杂性或硬件复杂性来实现令人满意的光谱效率性能。
A variable-phase-shifter (VPS) architecture with hybrid precoding for mixture use of phase shifters and switches, is proposed for millimeter wave massive multiple-input multiple-output communications. For the VPS architecture, a hybrid precoding design (HPD) scheme, called VPS-HPD, is proposed to optimize the phases according to the channel state information by alternately optimizing the analog precoder and digital precoder. To reduce the computational complexity of the VPS-HPD scheme, a low-complexity HPD scheme for the VPS architecture (VPS-LC-HPD) including alternating optimization in three stages is then proposed, where each stage has a closed-form solution and can be efficiently implemented. To reduce the hardware complexity introduced by the large number of switches, we consider a group-connected VPS architecture and propose a HPD scheme, where the HPD problem is divided into multiple independent subproblems with each subproblem flexibly solved by the VPS-HPD or VPS-LC-HPD scheme. Simulation results verify the effectiveness of the propose schemes and show that the proposed schemes can achieve satisfactory spectral efficiency performance with reduced computational complexity or hardware complexity.
