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Single-Scatter Model for Short-Range Ultraviolet Communication in a Narrow Beam Case

Tianfeng Wu,Jianshe Ma,Renzhi Yuan,Ping Su,Julian Cheng

Published 2019 in IEEE Photonics Technology Letters

ABSTRACT

The single-scattering model for short-range ultraviolet (UV) communication is often replaced by an approximate model due to its simplified calculation. However, there are certain errors associated with the existing approximate models. To reduce the errors, a spherical crown (SC) model in a narrow beam case is derived in this letter, where we assume that the differential volume is a thin layer of SC. Meanwhile, the applicable conditions and the error range of the SC model are provided. The calculation results indicate that the errors of the existing approximate models range from −1.4 to 6.0 dB while those of the SC model range from −0.2 to 0.4 dB for the considered transceiver geometries, which means that the SC model has a higher accuracy than the existing approximate models. In addition, the bit-error rate performance of the UV communication system under the SC model is also presented. This letter greatly improves the accuracy of the single-scattering approximate model and provides a new method to estimate the path loss of short-range UV communication.

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