A joint precoding scheme for indoor downlink multi-user MIMO VLC systems

被引：2
|
作者：
Zhao, Qiong [1 ]
Fan, Yangyu [1 ]
Kang, Bochao [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Elect & Informat, Xian, Shaanxi, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2017年 / 403卷
关键词：
Visible light communication (VLC); Multi-user multi-input multi-output (MU-MIMO); Precoding; Block diagonalization (BD); Power-method; VISIBLE-LIGHT COMMUNICATION;
D O I：
10.1016/j.optcom.2017.07.059
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this study, we aim to improve the system performance and reduce the implementation complexity of precoding scheme for visible light communication (VLC) systems. By incorporating the power-method algorithm and the block diagonalization (BD) algorithm, we propose a joint precoding scheme for indoor downlink multi-user multi-input-multi-output (MU-MIMO) VLC systems. In this scheme, we apply the BD algorithm to eliminate the co-channel interference (CCI) among users firstly. Secondly, the power-method algorithm is used to search the precoding weight for each user based on the optimal criterion of signal to interference plus noise ratio (SINR) maximization. Finally, the optical power restrictions of VLC systems are taken into account to constrain the precoding weight matrix. Comprehensive computer simulations in two scenarios indicate that the proposed scheme always has better bit error rate (BER) performance and lower computation complexity than that of the traditional scheme. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：341 / 346
页数：6
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