摘要
提出了一种基于可见光通信技术的新型无线导览系统。在需要安装导览系统的地方对LED照明系统进行合适的改造,使LED发射带有识别码的可见光。当带有光电二极管的终端进入光照范围时,直接接受识别码,并经过跨阻放大器、滤波电路、电平判决器等电路处理后生成数字信号发送给后级微处理器,再通过解码、识别码比对等处理实现目标定位和无线导览的功能。利用FPGA开发套件及可见光发射机、接收机搭建了一个采用Manchester编解码和OOK调制方式的最简无线导览系统,并通过测试验证了系统的可行性。
A novel wireless navigation system based on the visible light communication technology has been proposed.After appropriate modification of the light emitting diode（LED） illumination system at the place where the navigation system is installed,LEDs can emit visible light with the identification information.When the terminal equipped with the photodiode detector enters the illuminated area,the received identification information is converted by transimpedance amplifier,filter and level judgment circuits to digital signals,which are sent to the microprocessor.The positioning and wireless navigation functions can then be realized after decoding and comparing the identification information.A simplest wireless navigation system based on the Manchester encoding and decoding and the OOK modulation is built by using FPGA development kits,visible light transmitter and receiver.The feasibility of the demonstration system is verified by testing results.
出处
《光通信技术》
CSCD
北大核心
2012年第3期56-59,共4页
Optical Communication Technology
基金
中央高校基本科研业务费专项资金项目(JUSRP20914,JUD-CF10031)资助
轻工过程先进控制教育部重点实验室开放课题资助项目(APCLI1001)资助
关键词
可见光通信
室内无线导览系统
发光二极管
visible light communication
indoor wireless navigation system
light emitting diode
