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基于法向量倾斜的可见光通信多输入多输出信道解相关技术

Multiple-Input Multiple-Output Channel Decorrelation Technique for Visible Light Communication Based on Normal Vector Tilting

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摘要

随着可见光通信多输入多输出(VLC-MIMO)系统收发端阵元数目增多、阵元间距减小以及传输距离增大, 系统接收端信号间严重干扰、信道矩阵缺秩等问题逐渐凸显, 导致系统的复用率降低、信道相关性增大。针对这些问题, 提出以最小化最大干信比为优化目标; 通过建立VLC-MIMO信道模型, 分析收发端阵元法向量倾斜角度对信道相关性的影响; 通过优化发光二极管(LED)法向量倾斜角度来减小信道相关性, 并得到各个LED法向量的最佳倾斜角度。通过比较系统接收平面的光照度分布, 发现所提出的优化方案能有效减小信号间干扰, 与链路阻塞方式相比, 该方案的误码率降低了42 dB。

Abstract

In visible light communication multiple-input multiple-output (VLC-MIMO) system, the increasing of sender and receiver elements, the decreasing of array element space, and the increasing of transmission distance cause a series problems of serious interference on receiver of the system and lack of channel matrix, and further lead to low reusing rate of the system and large channel correlation. To solve these problems, the minimizing of interference-to-signal ratio is taken as the optimization goal. The channel model of VLC-MIMO is established, and the effects of the normal vector tilting angles of sender and receiver elements on channel correlation are analyzed. The normal vector tilting angle of light-emitting diode is optimized to decrease the channel correlation, and the optimal tilting angle of the normal vector tilting angle of each LED is obtained. By comparing the illumination distribution on the receiving plane of the system, we find that the proposed scheme can effectively reduce the interference, and the bit error rate is reduced by 42 dB compared with that of the link-blocked system.

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中图分类号:TN929.12

DOI:10.3788/aos201737.0506001

所属栏目:光纤光学与光通信

基金项目:国家863计划(2013AA013603)、国家自然科学基金(61271253)

收稿日期:2016-10-21

修改稿日期:2017-01-07

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作者单位    点击查看

张海勇:中国人民解放军信息工程大学信息系统工程学院, 河南 郑州 450002
朱义君:中国人民解放军信息工程大学信息系统工程学院, 河南 郑州 450002
张艳语:中国人民解放军信息工程大学信息系统工程学院, 河南 郑州 450002

联系人作者:张海勇(xxgczhanghaiyong@163.com)

备注:张海勇(1991—), 男, 硕士研究生, 主要从事可见光通信方面的研究。

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引用该论文

Zhang Haiyong,Zhu Yijun,Zhang Yanyu. Multiple-Input Multiple-Output Channel Decorrelation Technique for Visible Light Communication Based on Normal Vector Tilting[J]. Acta Optica Sinica, 2017, 37(5): 0506001

张海勇,朱义君,张艳语. 基于法向量倾斜的可见光通信多输入多输出信道解相关技术[J]. 光学学报, 2017, 37(5): 0506001

被引情况

【1】徐文艳,于宏毅,杨森. 以用户为中心的可见光通信协作传输中训练资源分配算法. 激光与光电子学进展, 2020, 57(1): 10601--1

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