室外可见光通信(VLC)系统中, 高强度的太阳光、高亮度的电子广告牌, 以及大量的人造光源等使得光电探测器容易出现饱和或者非线性输出等异常情况。为了解决此问题, 首先回顾了面向室外智能交通的VLC研究进展; 接着针对室外应用环境中出现的不同类型的干扰, 介绍了抗干扰收发技术, 包括光信道起伏与遮挡下的喷泉码方案、强背景光干扰与探测器饱和下的衰减分集接收技术, 以及多光源干扰下的自动对准与跟踪方法等; 最后, 指出这些抗干扰收发技术在未来的改进和研究方向。

In an outdoor visible light communication (VLC) system, a photodetector is vulnerable to strong sunlight, bright elec-tronic billboards, and numerous artificial light sources, which leads to its saturation or nonlinear behavior. To solve this problem, this paper first overviews the research progress on VLC for outdoor intelligent transportation. Then, it introduces the transceiver techniques of interference mitigation, including Fountain codes for optical channel fluctuation and occlusion, reception techniques by attenuation diversity to mitigate strong ambient light interference and detector saturation, and the auto-alignment and tracking methods under multiple light source interference. Finally, the future improvement and research direction of these interference mitigation transceiver technologies are pointed out.