毫米波大规模MIMO 系统基于等效信道的全连接混合预编码设计  

Design of full-connected hybrid precoding based on an equivalent channel in millimeter-wave massive MIMO system

作　　者：曹海燕[1] 马智尧 智应娟 刘仁清 许方敏[1] 方昕[1] CAO Haiyan;MA Zhiyao;ZHI Yingjuan;LIU Renqing;XU Fangmin;FANG Xin(Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学,浙江杭州310018

出　　处：《电信科学》2021年第1期85-93,共9页Telecommunications Science

基　　金：国家自然科学基金资助项目(No.61501158)。

摘　　要：为了提升毫米波大规模MIMO系统中基于全连接结构的混合预编码性能,提出一种基于等效信道两步设计法的混合预编码方案。首先结合发送端模拟预编码矩阵、接收端模拟组合矩阵和信道矩阵构造等效信道,以最大化等效信道增益为目标设计出收发端的模拟部分,之后对数字预编码矩阵与数字组合矩阵逐列应用最小二乘准则进行求解,设计出收发端数字部分。仿真结果表明,所提算法能够逼近最优全数字预编码方案且具有较低的复杂度,并具有较强的容错性。In order to improve the performance of hybrid precoding scheme based on fully connected structure in millimeter-wave massive MIMO system,a hybrid precoding scheme based on an equivalent channel with two-step design method was proposed.Firstly,the equivalent channel was constructed by combining the analog precoding matrix at the transmitter,the analog combining matrix and the channel matrix at the receiver,and the analog part of the transceiver was designed to maximize the equivalent channel gain.Furthermore,the least squares criterion was applied to derive the digital precoding matrix and the digital combination matrix column by column to design the digital part of the transceiver.Simulation results show that the proposed algorithm can approximate the optimal digital precoding scheme and has lower complexity and stronger fault tolerance.

关 键 词：大规模MIMO 等效信道增益 最小二乘 容错性 

分 类 号：TN929.5[电子电信—通信与信息系统]