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Study on VLC channel Model in Underground Mining Scenarios with Extinction Effect and Shadowing Effect
Applied Optics- received 01/25/2024; accepted 04/18/2024; posted 04/18/2024; Doc. ID 520073
- Abstract: In this work, a novel visible light communication (VLC) channel model is proposed for underground mining scenarios taking into account the impact of coal dust particles and obstacles. Specifically, the extinctioneffect of the coal dust particles is analyzed on the basis of the Mie theory, and the quantitative formula ofthe influence on channel direct current (DC) gain is derived. Meanwhile, the effect of random shadowingphenomenon is investigated and quantified with the geometric and statistical model considering theposition, size, and shape of the obstacles. The channel impulse response, path loss, root mean square delayspread, and bit error rate (BER) are further investigated in two different underground mining scenarios,namely, mining roadway and coal mine working face. Simulation results show that the shadowing effectplays a major role in the influence of DC gain attenuation. Furthermore, the BER performance would benoticeably degraded due to the presence of coal dust particles and obstacles, especially when the receiveris located far from the transmitter. This work will benefit the design of the VLC systems in undergroundmines.