下行多用户MIMO系统中的一种联合处理算法  

Combined Processing Algorithm for Downlink Multiuser MIMO System

作　　者：仲涛 周红明 王俊峰 王蕊 ZHONG Tao;ZHOU Hong-ming;WANG Jun-feng;WANG Rui(School of Physics and Electronic Engineering,Yuxi Normal University,Yuxi Yunnan 653100,China)

机构地区：[1]玉溪师范学院物理与电子工程学院,云南玉溪653100

出　　处：《通信技术》2018年第6期1282-1286,共5页Communications Technology

摘　　要：在多用户下行多输入多输出(MIMO)系统中,采用空分多址(SDMA)技术能提高系统的吞吐量。然而,在多用户下行MIMO系统中存在共信道干扰问题,很大程度上影响了整个系统的实际容量。因此,提出了一种联合处理算法,即将块对角化(BD)算法与最小均方误差(MMSE)算法相结合,对信号进行联合处理,以降低共信道干扰。仿真验证表明,所提算法有效降低了共信道干扰,提高了系统性能,算法具有有效性。SDMA（Space-Division Multiple Access） is adopted in the downlink of a multiuser multiple-input multiple-output（MIMO） wireless communication system, so as to raise the system throughput. However, there exists the co-channel interference in the multi-user downlink of MIMO wireless communication system, and this would affect the actual capacity of the whole system to a large extent. In order to reduce the co-channel interference, a combined processing algorithm is proposed for uplink multiuser MIMO system, that is, the signal is co-processed by combining BD（Block Diagonalization） algorithm with MMSE（Minimal Mean-Square Error） algorithm. The proposed algorithm could efficiently reduce the co-channel interference and improves the system performances. Simulation indicates the effectiveness of the proposed algorithm.

关 键 词：多用户 MIMO 吞吐量 共信道 联合处理 

分 类 号：TN919.3[电子电信—通信与信息系统]