Hybrid Block Diagonalization Precoding for Multi-User Weighted Sum-Rate Maximization  

作　　者：Su Xiaofeng Jiang Yi 

机构地区：[1]Key Laboratory for Information Science of Electromagnetic Waves(MoE),Department of Communication Science and Engineering,Fudan University,Shanghai 200433,China

出　　处：《China Communications》2024年第8期127-141,共15页中国通信（英文版）

基　　金：supported by National Natural Science Foundation of China(No.61771005)

摘　　要：This paper studies large-scale multi-input multi-output(MIMO)orthogonal frequency division multiplexing(OFDM)communications in a broadband frequency-selective channel,where a massive MIMO base station(BS)communicates with multiple users equipped with multi-antenna.We develop a hybrid precoding design to maximize the weighted sum-rate(WSR)of the users by optimizing the digital and the analog precoders alternately.For the digital part,we employ block-diagonalization to eliminate inter-user interference and apply water-filling power allocation to maximize the WSR.For the analog part,the optimization of the PSN is formulated as an unconstrained problem,which can be efficiently solved by a gradient descent method.Numerical results show that the proposed block-diagonal hybrid precoding algorithm can outperform the existing works.

关 键 词：block-diagonal gradient descent hybrid precoding iterative optimization MIMO-OFDM MULTI-USER water-filling power allocation weighted sum-rate maximization 

分 类 号：TN929.5[电子电信—通信与信息系统]