Visible light assisted relay communication system and a power allocation scheme

被引：0
|
作者：
Xie F. [1 ]
Feng L. [1 ]
机构：
[1] School of Computer & Communication Engineering, Beijing University of Science and Technology, Beijing
来源：
Feng, Lifang (lifang.feng@gmail.com) | 1600年 / Science Press卷 / 47期
关键词：
Asymmetrically clipped DC biased optical offset frequency division multiplexing; Genetic algorithm; Power allocation; Visible light communication;
D O I：
10.19665/j.issn1001-2400.2020.01.014
中图分类号：
学科分类号：
摘要：
When the indoor visible light communication link is interrupted due to occlusion blocking, the signal needs to be forwarded through the auxiliary relay, and therefore, an indoor visible light communication auxiliary relay system model is established. First, the positional constraint relationship of indoor light source on the roof when there is link blockage in the indoor visible light communication system is analyzed by using the office ceiling light as the signal light source and relay, and the asymmetrically multiplexing DC offset optical orthogonal frequency division multiplexing is used to realize the auxiliary relay signal multiplexing, which ensures the occlusion signal relay transmission while maintaining its target terminal. Then the genetic algorithm is used to optimize the distribution of the power at the source and the relay to optimize the system performance, and the BER performance of the equal power allocation scheme is compared in the occlusion case. The results show that when the direct communication link is blocked, the system loss of the auxiliary relay system with the optimal power allocation scheme is 3 dB less than the system with equal power allocation. © 2020, The Editorial Board of Journal of Xidian University. All right reserved.
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页码：95 / 103
页数：8
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