白光 LED 语音通信系统的设计与实现

摘要

The visible light communication VLC is a highly efficient and reliable communication of green technology ,a combination of wireless communication and LED lighting technology ,with good confidential communication performance .In order to achieve better communication white LED communication ,white LED voice communications systems are designed based on FPGA platform .The system includes a transmission circuit of the LED ,an optical system ,the optical receiver and digital signal processing systems .RS codes and pulse position modulation PPM are chosen to be united .Experimental results show that :the system has good real-time voice transmission effect ,no noise ,good effect .A single LED communication dis-tance is up to 2 .5 meters ,this program has a good practical and research value .%可见光通信 VLC（Visible Light Communication）是一种高效且绿色环保的可靠通信技术，结合了无线通信和LED 照明技术，具有良好的保密通信性能。为了更好地实现白光 LED 通信，设计出基于 FPGA 平台的白光 LED 语音通信系统。该系统包含了 LED 外围驱动电路、光学系统、光接收机以及数字信号处理系统等。选用 RS 码与脉冲位置调制 PPM相结合的方式，实验表明：该系统具有很好的实时语音传输效果，无噪音，效果好。单个 LED 通信距离达到2．5m ，该方案具有很好的实用性和研究价值。