1. School of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China
2. Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing, Xi’an University of Technology, Xi’an 710048, China
Abstract：Ultraviolet (UV) is scattered by atmospheric haze particles, the changes of scattering channel characteristics in atmosphere haze can reflect the physical properties of the particles. The scattering channel characteristics of UV in different haze particle form and concentrationwere analyzed based on wireless ultraviolet single and multiple scattering channel model, Mie scattering and T-matrix theory. The effect of scattering angle on the scattering intensity was researched; finally the experiment of UV light was completed. After theoretical and simulation analysis, the path loss and intensity distribution of UV communication under different haze particle form were obtained. The results showed that under UV line-of-sight (LOS) communication method, the path loss increased with the increase of haze particle concentration, and the communication quality was worse than sunny days; In short distance non-line-of-sight (NLOS) communication mode, the path loss at high haze concentration was lower than low concentration. However, as the communication distance continued to increase, communication quality of high haze concentration decreased sharply and achieved optimal in low haze concentration finally. The communication distance at 200 m was better than sunny environment. When the communication distance was the same, the intensity distribution of ultraviolet scattering at three kinds of haze concentrations decreased with the increase of scattering angle. when the scattering angle increased and more than 90 degrees, the scattering intensity under the low haze concentration was the highest. The main reason was that although the scattering angle continued to increase, the effective scattering volume decreased, so the scattering intensity in low haze concentration is larger. Moreover, when the particle size was the same, the attenuation of spherical particles was larger than non-spherical particles. The experimental results were similar to the simulation results, which proved the correctness of the simulation results. And to some extent, it proves that non-spherical particles are more than spherical particles in the atmosphere.
Key words：Ultraviolet; Haze particles; Scattering intensity; Path loss
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