Reflecting the Light: Energy Efficient Visible Light Communication with Reconfigurable Intelligent Surface

被引：45

作者：

Cao, Binghao ^{[1
]}

Chen, Ming ^{[1
]}

Yang, Zhaohui ^{[2
]}

Zhang, Minghui ^{[1
]}

Zhao, Jingwen ^{[1
]}

Chen, Mingzhe ^{[3
]}

机构：

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

[2] Kings Coll London, Ctr Telecommun Res, Dept Informat, London, England

[3] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

来源：

2020 IEEE 92ND VEHICULAR TECHNOLOGY CONFERENCE (VTC2020-FALL) | 2020年

基金：

中国国家自然科学基金;

关键词：

Visible light communication; reconfigurable intelligent surface; energy efficiency; SYSTEM;

D O I：

10.1109/VTC2020-Fall49728.2020.9348585

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 paper investigates the energy efficiency maximization problem in a downlink reconfigurable intelligent surface (RIS) assisted visible light communication (VLC) system. The energy efficiency maximization problem is formulated via jointly optimizing time allocation, power control, phase shit matrix under the unique power constraints in VLC. To solve this non convex energy efficiency maximization problem, the original problem is first simplified to an equivalent problem with a smaller number of variables. Then, an alternating algorithm with low complexity is accordingly proposed to obtain a suboptimal solution via iteratively solving the joint time allocation and power control subproblem, and the phase shift matrix adjustment subproblem. The simulation results show that the proposed algorithm can achieve up to 0.127dB gain in terms of energy efficiency compared to the conventional interior point method.

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