室内可见光OFDM通信系统调光控制技术

王旭东; 徐宪莹; 吴楠; 冯海燕

doi:doi:10.3788/gzxb20154411.1106002

光子学报, 2015, 44 (11): 1106002, 网络出版: 2015-12-18

室内可见光OFDM通信系统调光控制技术

Dimming Control Technique for OFDM Based Indoor Visible Light Communication System

论文大纲

王旭东 ^1,*徐宪莹 ²吴楠 ¹冯海燕 ¹

作者单位

¹ 大连海事大学信息科学技术学院,辽宁大连 116026

² 大连科技学院电气工程系,辽宁大连 116052

摘要

针对室内可见光通信高速率传输和照明控制的问题,分析了采用脉冲宽度调制调光控制技术的可见光正交频分复用技术系统的调光性能与误码性能.提出了基于功耗小、性能好的单极性正交频分复用系统的调光控制方案,对单极性正交频分复用系统的驱动电流和误码率特性进行了仿真,仿真结果表明,单极性正交频分复用系统可在不牺牲照明质量的同时改善系统性能.此外,针对室内低照明、低功耗的应用需求,提出了一种功率更加有效的补零非对称削波正交频分复用系统,仿真分析表明,补零非对称削波正交频分复用系统可在不损失误码性能的情况下提高系统的功率效率.

Abstract

Focused on two functions of illumination and high rate transmission provided by indoor visible light communication systems,the performance of dimming control with pulse width modulation and bit error rate for Orthogonal Frequency Division Multiplexing based visible light communication was analyzed. A new dimming control scheme based on unipolar orthogonal frequency division multiplexing was proposed due to better performance in terms of both power efficiency and bit error rate achieved by unipolar orthogonal frequency division multiplexing. The dynamic-range of drive current and bit error rate performance were simulated,and the results show that unipolar orthogonal frequency division multiplexing system can obtain better error performance in the mean time without sacrificing illumination quality. In addition,a novel system scheme named zero-padding asymmetrically clipped optical orthogonal frequency division multiplexing is presented,which is more efficient in power for the demand of weak lighting intensity and low power consumption. Simulation results show that zero-padding asymmetrically clipped optical orthogonal frequency division multiplexing system can improve the power efficiency of the system without loss of error performance.

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王旭东, 徐宪莹, 吴楠, 冯海燕. 室内可见光OFDM通信系统调光控制技术[J]. 光子学报, 2015, 44(11): 1106002. WANG Xu-dong, XU Xian-ying, WU Nan, FENG Hai-yan. Dimming Control Technique for OFDM Based Indoor Visible Light Communication System[J]. ACTA PHOTONICA SINICA, 2015, 44(11): 1106002.

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