基于RGB LED可见光通信的实验研究

Experimental Study Based on RGB LED Visible Light Communication

为了实现可见光通信技术照明和通信的双重功能,将脉冲位置调制(PPM)、色移键控调制方式(CSK)与现场可编程门阵列(FPGA)硬件算法相结合,实验验证了所提出的一种基于RGB LED应用的优化型脉冲位置调制方式(RGB CPPM)。对发送端恒流驱动电路、光学天线模块、LED热管理以及接收端各信号处理电路模块进行了设计,搭建了实验系统并进行了测试。通过测试对电路进行验证,分析波形、误码率和照度等实验数据,最后验证了系统的可行性和实用性。

In order to realize the functions of illumination and communication of the visible light communication （VLC） technology, pulse position modulation （PPM）, color shift keying （CSK） and hardware algorithm field programmable gate array （FPGA） are combined to verify experimently the proposed RGB chaotic pulse position modulation （CPPM） based on RGB LED application. The constant current drive circuit at the transmitting terminal, the optical antenna module, LED heat management and each signal-processing circuit module are designed in the system. The circuit performance is verified by testing. The parameters, including waveform, bit error rate （BER）, illumination and others, are analyzed. The feasibility and oracticabilitv of the svstem are validated.