Networking

A Path Loss Model for Non-Line-of-Sight Ultraviolet Multiple Scattering Channels

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Executive Summary

An UltraViolet (UV) signal transmission undergoes rich scattering and strong absorption by atmospheric particulates. The authors develop a path loss model for a Non-Line-Of-Sight (NLOS) link. The model is built upon probability theory governing random migration of photons in free space, undergoing scattering, in terms of angular direction and distance. The model analytically captures the contributions of different scattering orders. Thus it relaxes the assumptions of single scattering theory and provides more realistic results. This allows one to assess the importance of high-order scattering, such as in a thick atmosphere environment, where short range NLOS UV communication is enhanced by hazy or foggy weather.

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