Study on Layout and Characteristic Analysis of Highway Tunnel LED Based on Visible Light Communication

The communication system in the tunnel environment should not only realize the operation and scheduling of cars and trains, but also provide passengers with services such as telephone, work and office. However, conventional RF communication technology was faced with the defects of increasing communication cost and less and less frequency spectrum resources. The optical communication with high speed modulation and green illumination has become a hot topic for wireless communication. In this paper, the optimized the layout of LED light as the source for visible light communication was applied to improve the performance of tunnel communication system. First, the transmission model of visible light communication system combined with the actual environment of the tunnel was analyzed, and then the layout scheme of LED was designed fit with the spatial structure characteristics for the tunnel. The last, MATLAB was used to simulate and analyze, Simulation results showed that uniform illumination distribution was obtained to meet the lighting requirements of the system and performance of the tunnel communication system. In this paper, the MATLAB mathematical modeling software was used to simulate the layout of the light source, explore the best communication effect under different layout, laying a foundation for the stable communication of tunnel visible light.