Clipping Distortion Analysis and Optimal Power Allocation for ACO-OFDM based Visible Light Communication

被引：0
|
作者：
Lu, Qing-feng [1 ]
Ji, Xin-sheng [1 ]
Huang, Kai-zhi [1 ]
机构：
[1] Natl Digital Switching Syst Engn & Technol Res Ct, Zhengzhou, Henan Province, Peoples R China
来源：
2014 4TH IEEE INTERNATIONAL CONFERENCE ON INFORMATION SCIENCE AND TECHNOLOGY (ICIST) | 2014年
关键词：
Visible Light Communication; ACO-OFDM; Clipping Distortion; Power Allocation;
D O I：
暂无
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 analyses the nonlinear clipping distortion of asymmetrically clipped optical OFDM (ACO-OFDM) based visible light communications system (VLC) and proposes an optimal power allocation method for reducing the clipping distortion. Firstly, we analyze the LED nonlinear clipping distortion based on the clipping process model that original signal directly added nonlinear clipping distortion components. Then, the effective signal to noise ratio (ESNR) is defined to measure the clipping distortion, and the clipping distortion analysis is converted into ESNR analysis. Finally, the optimal power allocation under optical power constraints base on the principle of ESNR optimum is proposed. Simulation results show that reasonable power allocation can effectively reduce the LED nonlinear clipping distortion and ensure that the bit error rate (BER) is less than 10(-3).
引用
收藏
页码：320 / 323
页数：4
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