Abstract
Visible light communication (VLC) is an emerging technology for public street lighting. The paper comprises two parts. A spatial scaled simulation model for Signal to Noise Ratio (SNR) analysis and a spatial scaled experiment are elaborated to evaluate the VLC propagation channel model in an inhomogeneous street lighting channel. As a first result, a minor improved non Line of Sight (NLoS) ceiling bounce simulation substantially agrees with the measurement. The model is sufficient adequate for a path loss estimation in a larger spatial dimension. As a second result, the receiver requires a huge aperture of 10 to 30 cm diameter for a communication performance of wireless sensor networks between the lights. The Line of Sight (LoS) link requires nearly a quarter of the surface but pointing errors are likely due to the rural outdoor environment. Furthermore, the spatial simulation resolution considering a small Field of View (FOV) influences the gain of up to 5 dB and has therefore been identified as a new error source in the NLoS propagation model whereby the influence is negligible at medium distances.
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