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

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 error range of SC model are provided. The calculation results indicate that the errors of existing approximate models range from ..1.4 dB to 6.0 dB while that of SC model range from ..0.2 dB to 0.4 dB for the considered transceiver geometries, which means that SC model has a higher accuracy than the existing approximate models. In addition, the bit-error rate performance of UV communication system under SC model is also presented. This work greatly improves the accuracy of single scattering approximate model and provides a new method to estimate the path loss of short-range UV communication.