摘要
由于医院、飞机等特殊场合对电磁波比较敏感,传统的无线电通信方式不适合此类场所,本文根据VLC原理,对大气信道进行建模分析的基础上,设计开发了一套室内点对点VLC通信平台。系统采用IM/DD调制方式,通信链接为直射式LOS链接,通过合理设计发射端光源LED的调制驱动电路、接收端探测电路、放大器电路,选用0.5W功率的LED灯珠,在室内白天强背景光干扰及室内灯光干扰状态下,实现了室内0.3m的无失真稳定的信息传输,验证了基于白光LED的可见光通信系统的可实现性;同时采用本系统对室内环境参量进行了实时监测传输,系统传输性能稳定、可靠,验证了基于白光LED可见光通信系统在室内的可实用性。
At some special places such as hospitals and airplanes are sensitive to the electromagnetic wave. The tradition radio communication method is not suitable for such places. A set of indoor point-to-point VLC communica- tion platform is designed based on the principle of VLC and the analysis of the modeling of atmospheric channel in this paper. The system uses IM/DD modulation method. And the communication＇ s link is direct LOS link. We have de- signed the modulation-driving circuit and detection circuit and amplifier circuit and introduced equalization module at the receiving end. We have used LED lamp beads which power is 0. 5W. Under the strong day light and indoor inter- ference, we achieved stable information transmission without distortion at the distance of 0.3m indoor, which proves that the visible light communication system based on white LED can be realized. At the same time we use this system to monitor and transmit the indoor environment parameters for real-time. The transmission performance of this system is stable and reliable, which proves that the visible light communication system based on white LED can be practical.
出处
《激光杂志》
北大核心
2017年第6期112-115,共4页
Laser Journal
基金
国家自然科学基金项目(61671362&6127136)
陕西省科技厅自然基金项目(2012JQ8008)
陕西省教育厅科技专项(2012JK0545)
西安市科技计划项目(CXY1341(3))
