In order to improve the multiplexing gain of the Visible Light Communication(VLC)system,a fixed-ratio-pixelated VLC system based on Multiple Input Multiple Output(MIMO)is proposed in this arti-cle.The system first performs space-angle mapping,so that data transmission can be carried out in the angu-lar domain;at the same time,the Raptor coding method is used to track the change of data channel character-istics caused by the truncation of the window.Then,for a series of time-varying images captured by a high-speed camera,the system uses the scatter effect to obtain a fixed-scale image over all link distances.In the ex-periment,the proposed VLC system is verified by using liquid crystal displays and high-speed cameras.Com-pared with the traditional pixelated MIMO system,the proposed system has higher robustness in the case of misalignment,so it has a wide application prospect in multiplexing scenarios.
关键词
多输入多输出/可见光通信/Raptor编码/空间-角度映射/固定比例
Key words
multiple input multiple output/Visible Light Communication(VLC)/Raptor coding/spatial-angle mapping/fixed ratio
维普
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