摘要
将LED照明和可见光通信技术结合,构建出基于室内实时以太网视频传输的可见光通信系统.系统发送端利用高速场效应管直接驱动控制光源,并结合以太网数据特征,采用UDP传输协议,对信号进行4B:5B和非归零反相编码(NRZI)相结合的编码.接收端采用基于FPGA的数字锁相环技术对光探测信号的时钟和数据进行恢复和提取.系统实现了室内1m距离的实时以太网视频可见光通信传输,促进了可见光通信技术的实用化.
By combining LED lighting and visible light communication technology, an indoor visible light communication system is designed based on real-time ethernet video signal transmission. The system uses high-speed MOSFET to directly drive the light source, combines the features of ethernet data, and uses the UDP transport protocol to code the signal with a four-bit to five-bit and No-Return-Zero-Inverse coding method; the receiver recovers the data based on the FPGA dig- ital phase-locked loop technology. The system implements indoor real-time ethernet video visible light communication transmission in a distance of one meter without distortion, thereby, kick-start- ing its practical application.
出处
《北方工业大学学报》
2014年第1期16-21,共6页
Journal of North China University of Technology
关键词
可见光通信
高速场效应管
数字锁相环
时钟和数据恢复
以太网
visible light communication
high speed MOSFET
digital phase-locked loop
clock and data recovery
ethernet
