摘要
给出了一种涉及多光源的多输入多输出(MIMO)可见光无线通信(VLC)系统。通过编程模拟出n个发射光源,分别发射n路不同的码流。无线信号接收端用摄像头来采集无线信号,对采集到的信号使用图像处理技术来识别各个传输通道的信息,并进一步恢复出n路码流。实验结果表明,实验中出现的少量误码均可被正确纠正,发送端发送的信号码流在接收端均可被正确地恢复出来。提出的系统通过更改信号接收机制,规避了基于光电二极管接收信号的现有系统中所存在的光源布局与同步难题及多径干扰问题。提出的多通道信号传输与接收方式,提高了光源利用率,因其可操作性而具有实用价值。
A novel multiple-input multiple-output（MIMO） visible light communication（VLC） system is proposed,by applying multi-lights. n lights are simulated by software and different signal sequences are sent, respectively.In the receiver, camera is employed to receive the wireless signals. After that, the image processing algorithms are defined to recognize and restore the signal sequences and the n signal sequences can be recovered. The result demonstrates that the minority error codes appeared in the experiments all can be rectified accurately, and the signal sequences sent in the transmitting end all can be restored in the receiving end exactly. The presented approach evades the layout problem of lighting, the synchronization problem, and the multipath interference problem existed in the presented system based on the photodiode receiver by altering the mechanism of signal receiving. The way of transferring and receiving the signals based on multi-channels presented increases the use ratio of light source, and it possesses more practical value because of its operability.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2015年第1期71-79,共9页
Acta Optica Sinica
关键词
光通信
可见光通信
摄像头
图像处理
多输入多输出
optical communications
visible light communication
camera
image processing
multiple input multiple output
