Rate Maximization for Downlink Multiuser Visible Light Communications

被引：37

作者：

Shen, Hong ^{[1
]}

Deng, Yuqin ^{[1
]}

Xu, Wei ^{[1
]}

Zhao, Chunming ^{[1
]}

机构：

[1] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China

来源：

IEEE ACCESS | 2016年 / 4卷

基金：

中国国家自然科学基金;

关键词：

Visible light communication (VLC); transmit beamforming; achievable rate maximization; OPTIMIZATION; CAPACITY;

D O I：

10.1109/ACCESS.2016.2614598

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

We are interested in optimizing transmit beamforming for a visible light communication multiuser system such that the achievable sum rate is maximized. We first derive a closed-form sum rate expression via information-theoretic tools. Then, by further including light-emitting diode optical power constraints, we formulate the rate maximization problem in a mathematical optimization form. To address this difficult non-convex problem, we establish an iterative algorithm that exploits sequential parametric convex approximation. Compared with the existing zero-forcing beamforming strategies, the proposed approach does not restrict the co-channel interference to be zero, and thus achieves a higher sum rate, as is validated by simulations.

引用

页码：6567 / 6573

页数：7

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