基于几何均值分解的多用户MIMO系统预编码设计  

Precoding design for multiuser MIMO systems using geometric mean decomposition

作　　者：周斌 ZHOU Bin(Network&Information Centre,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学网络信息中心,上海200240

出　　处：《通信学报》2018年第A01期184-188,共5页Journal on Communications

摘　　要：提出了一种联合收发器设计,结合了几何均值分解和THP预编码方案,将多用户MIMO广播信道分解为多个相同信噪比的并行子信道。通过发射机中的联合THP编码和接收机中的线性均衡,每个用户可以对所有子信道中的数据流使用相同的码本,同时基站可以根据用户的最佳排序通知用户使用哪个码本。与传统的THP方案相比,可以更好地实现BER性能。理论分析和数值模拟均验证了这个方案。An joint transceiver design that combines the geometric mean decomposition(GMD)with Tomlinson-Harashima precoding(THP)scheme was proposed.The scheme decomposes a multiuser MIMO broadcast channel into multiple identical parallel signal-to-noise ratio(SNR)subchannels for each user.Joint THP at transmitter and linear equalization in each of the receivers,each user could use same codebook for all streams in all his subchannels,and the base station could inform each user which codebook to use depending on the optimal ordering of all the users.Compared to traditional THP scheme,The approaches can achieve better BER performance.Both theoretical analyses and numerical simulations validated the scheme.

关 键 词：几何均值分解 信道预编码 多输入多输出 THP预编码 

分 类 号：TN929.5[电子电信—通信与信息系统]