基于RGB型LED的光学相机通信系统的实现方案

Realization scheme of optical camera communication system based on RGB-LED

针对可见光-光学相机通信技术的实现,提出了一种传输速率及信息容量高效的可见光通信系统解决方案。该方案采用RGB型LED作为信源发射机,通过波分复用的方式可有效提高系统传输速率及信息容量,接收端以Android智能手机搭载光学相机作为接收机,利用手机相机的卷帘快门工作特性实现信息的接收。对于信息接收解码,设计了基于Java语言可独立运行的Android APP,通过引入直方图均衡化、最小二乘拟合等技术有效地抑制了接收图像的光晕效应,并且提出的同步动态补偿技术有效地提高了信息传输的可靠性。实验表明:提出的方案可在Android智能手机上实现传输速率为21.6kb/s的信息传输。

In view of the realization of visible light-optical camera communication technology, this paper proposes a scheme of visible light communication system to increase transmission rate and transmission capacity. In this scheme, RGB-LED is used as the source transmitter, which can effectively increase the system transmission rate and transmission capacity via wavelength division multiplexing. The receiving end is equipped with an optical camera as an receiver on an Android smartphone, and uses the rolling shutter mechanism of the mobile-phone camera to receive information. In view of the process of the information receiving and decoding, this paper designs an Android APP which can run independently based on Java language. By introducing histogram equalization, least squares fitting and other techniques, the blooming effect of the received image is effectively overcome, and the proposed synchronous dynamic compensation technique effectively improves the reliability of information transmission. The experimental show that the proposed scheme can realize the transmission of information with a transmission rate of 21.6kb/s on the Android smartphone.