摘要
由于少有多基色的白光LED,传统波分复用(Wavelength Division Multiplexing,WDM)可见光通信(Visible Light Communication,VLC)系统仅拥有R、G、B三个通道。针对VLC中WDM技术的应用受到白光LED器件限制的问题,本文提出了一种多光谱混光通信方法。该方法根据LED光源颜色特性、多脉冲位置调制特点和混光方式,设计出针对各通道LED光源的多脉冲位置调光调制方案,将色域和时域统一,在多通道通信的同时实现白光输出。本文利用4种单色LED设计出多光谱混光通信验证系统。实验结果表明,系统在4路并行通信的同时,输出白光色温5 500 K,色差小于人眼分辨范围(CIE1976色坐标体系Δu′v′小于0.005),多光谱混光通信是可行的。
Since rare multi-primary white LED, traditional Wavelength Division Multiplexing （WDM） visible light communication （VLC） system only has R, G, B three channels. In view of the WDM technology restricted by white LED device in VLC, a method of multispectral mixed light optical communication is proposed. According to the color characteristic of LED light, feature of multi-pulse position modulation （MPPM） and the approach of mixing light, a MPPM dimming modulation is designed for each channel, which uniforms the color and time domain that can realize communication and white light output in the meantime. A multispectral mixed light optical communication system is built using four single-color LEDs. The experimental results show that a white color, 5500K color temperature, is obtained when four channels parallel communication, and chromatic aberration is indecipherable for human eyes （CIE 1976 Au＇v＇〈0.005）. Multispectral mixed light optical communication is feasible.
出处
《光电工程》
CAS
CSCD
北大核心
2016年第7期79-84,共6页
Opto-Electronic Engineering
基金
国家973计划(2013CB329202)
国家自然科学基金(61571067)
工业技术基础项目(J312012B002)资助
关键词
光通信
可见光通信
多光谱混白光
波分复用技术
多脉冲位置调制
optical communications
visible light communication
multispectral mixed white light
wavelength division multiplexing （WDM） technology
multi-pulse position modulation （MPPM）
