Human shadowing effect on indoor visible light communications channel characteristics

Yang Xiang; Min Zhang; Mohsen Kavehrad; M. I. Sakib Chowdhury; MingMing Liu; Jian Wu; Xiongyan Tang

doi:10.1117/1.OE.53.8.086113

26 August 2014 Human shadowing effect on indoor visible light communications channel characteristics

Yang Xiang, Min Zhang, Mohsen Kavehrad, M. I. Sakib Chowdhury, MingMing Liu, Jian Wu, Xiongyan Tang

Author Affiliations +

Optical Engineering, Vol. 53, Issue 8, 086113 (August 2014). https://doi.org/10.1117/1.OE.53.8.086113

Abstract

The shadowing effect caused by the human body can have a considerable influence on indoor visible light communications (VLC) channel characteristics. A shadowing ray tracing (SRT) algorithm to investigate the human shadowing channel characteristics is proposed. To validate the effectiveness of the SRT model, an extensive indoor human shadowing channel measurement has been presented. Both scenarios, the line-of-sight (LOS) and the non-line-of-sight (NLOS), have been measured. Theoretical results from the SRT model are validated against the measurement results for channel path loss. The results from measurements and simulations show that receiver rotations can mitigate human shadowing effect under the LOS scenario. Under the NLOS scenario, the VLC system becomes more sensitive to human shadowing when the distance between the LED and the receiver is large. Finally, more simulation results on the channel root mean square delay spread are also presented to analyze its relation with human shadowing distance to the receiver.

Citation Download Citation

Yang Xiang, Min Zhang, Mohsen Kavehrad, M. I. Sakib Chowdhury, MingMing Liu, Jian Wu, and Xiongyan Tang "Human shadowing effect on indoor visible light communications channel characteristics," Optical Engineering 53(8), 086113 (26 August 2014). https://doi.org/10.1117/1.OE.53.8.086113

Published: 26 August 2014

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