Fair Non-Orthogonal Multiple Access for Visible Light Communication Downlinks

被引：108
|
作者：
Yang, Zhaohui [1 ]
Xu, Wei [1 ]
Li, Yiran [2 ]
机构：
[1] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China
[2] Southeast Univ, Dept Phys, Nanjing 210096, Jiangsu, Peoples R China
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2017年 / 6卷 / 01期
关键词：
Visible light communication (VLC); non-orthogonal multiple access (NOMA); user fairness; convex optimization; OPTIMIZATION; SYSTEM;
D O I：
10.1109/LWC.2016.2631471
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This letter investigates a downlink power control strategy for visible light communication (VLC) systems with non-orthogonal multiple access. Our goal is to maximize sum throughput of the multiuser VLC systems subject to both user fairness and unique intensity constraints for optical modulations. Though the original problem is nonconvex, we first transform it into an equivalent convex one by introducing auxiliary variables and applying variable transformation. Then, we present an optimal power control algorithm with low complexity. Numerical results show large rate gains compared to the conventional OFDM scheme.
引用
收藏
页码：66 / 69
页数：4
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