Abstract
Visible light communication (VLC) technique has a wide range of applications in the daily life, the penetration rate of it is further improved in recent years, and it provides a new possibility for information transmission without traditional communication signal coverage like the tunnel or the basement. Based on the analysis of the latest research by domestic and foreign scholars, and the research of the existing device for image transmission through visible light and the particularity of the tunnel environment, this paper studies the optimization of the light source distribution, the measurement of the illuminance at the receiving end, the signal modulation and demodulation, and the encoding and decoding technology. Through the simulation experiment and the selection of existing components and technologies, the optimization of the original device is realized, so that it can be used in the tunnel information transmission and can provide certain reference for future visible light communication technique research.
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