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A 3D Non-Stationary GBSM for Vehicular Visible Light Communication MISO Channels

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Document pages: 15 pages

Abstract: The potential of using visible light communication (VLC) technologies forvehicular communication networks has recently attracted much attention. Theunderlying VLC channels, as a foundation for the proper design and optimizationof vehicular VLC communication systems, have not yet been sufficientlyinvestigated. Vehicular VLC link impairments can have a significant impact onthe system performance and capacity. Such impairments include the opticalwireless channel distortion and background noise. This paper proposes a novelthree-dimensional (3D) regular-shaped geometry-based stochastic model (RS-GBSM)for vehicular VLC multiple-input single-output (MISO) channels. The proposed 3DRS-GBSM combines a two-sphere model and an elliptic-cylinder model. Both theline-of-sight (LoS) and single-bounced (SB) components are considered. Theproposed model jointly considers the azimuth and elevation angles by usingvon-Mises-Fisher (VMF) distribution. Based on the proposed model, therelationship between the communication range and the received optical power isanalyzed and validated by simulations. The impact of the elevation angle in the3D model on the received optical power is investigated by comparing with thereceived optical power of the corresponding two-dimensional (2D) model.Furthermore, the background noise is also modeled to evaluate the system ssignal-to-noise ratio (SNR).

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