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LED非线性对基于正交频分复用可见光通信系统的影响

Study of the Impact of LED Nonlinearity on Orthogonal Frequency Division Multiplex Based Visible Light Communication Systems

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摘要

基于带有寄生参数的发光二极管(LED)Shockley方程,结合具有饱和特性的固态功率放大器的幅度传输模型,构建了可见光通信系统中LED的双向饱和非线性模型。基于该模型,通过蒙特卡洛仿真分析了LED非线性对采用正交频分复用(OFDM)的可见光通信系统(VLC)性能的影响。分析结果表明OFDM的VLC系统性能受LED I-V特性非线性、直流偏置电压、基带调制方式、调制信号切顶比率及方式的直接影响。

Abstract

From the light-emitting diode (LED) Shockley equation, a LED′s bidirectionally saturated nonlinearity model in visible light communication (VLC) system is established in conjunction with high power amplifier model which shows saturated behavior at very large input voltage. Monte Carlo simulations are conducted to an orthogonal frequency division multiplex (OFDM) based VLC system using the LED model. Manifold analyses suggest that the system performance deeply depends on some key parameters in respect of LED nonlinearity, direct current (DC) bias voltage, baseband modulation scheme, signal clipping ratio, and the manner in which the signal is clipped.

广告组1 - 空间光调制器+DMD
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中图分类号:TN929.12

DOI:10.3788/cjl201138.0805007

所属栏目:光通信

基金项目:国家863计划(2010AA0321614001)和中国科学院知识创新工程重要方向性项目(2006A10401006)资助课题。

收稿日期:2011-02-22

修改稿日期:2011-03-30

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作者单位    点击查看

杨宇:中国科学院半导体研究所, 北京 100083
张建昆:中国科学院半导体研究所, 北京 100083
刘博:中国科学院半导体研究所, 北京 100083
陈弘达:中国科学院半导体研究所, 北京 100083

联系人作者:杨宇(yangyu@semi.ac.cn)

备注:杨宇(1984—),男,博士研究生,主要从事甚短距离光传输系统及可见光通信系统等方面的研究。

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引用该论文

Yang Yu,Zhang Jiankun,Liu Bo,Chen Hongda. Study of the Impact of LED Nonlinearity on Orthogonal Frequency Division Multiplex Based Visible Light Communication Systems[J]. Chinese Journal of Lasers, 2011, 38(8): 0805007

杨宇,张建昆,刘博,陈弘达. LED非线性对基于正交频分复用可见光通信系统的影响[J]. 中国激光, 2011, 38(8): 0805007

被引情况

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【4】陆庆峰,季新生,黄开枝,罗文宇. 降低可见光通信不均匀限幅正交频分复用系统非线性限幅失真的功率分配方法. 光学学报, 2014, 34(7): 706004--1

【5】沈芮,张剑,王鼎. 基于可见光通信的室内定位算法及相应参数估计克拉美罗界. 激光与光电子学进展, 2014, 51(9): 90604--1

【6】姚赛杰,徐浩煜,汪亮友,周婷,钱骅. LED记忆非线性自适应预失真技术研究. 中国激光, 2014, 41(11): 1105007--1

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