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LEDI-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。
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.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2011年第8期173-178,共6页
Chinese Journal of Lasers
基金
国家863计划(2010AA0321614001)
中国科学院知识创新工程重要方向性项目(2006A10401006)资助课题
关键词
光通信
可见光通信
正交频分复用
发光二极管
非线性失真
optical communications
visible light communications
orthogonal frequency division multiplex
lightemitting diode
nonlinearity distortion
