Research On Probabilistic Channel Modeling Approach For Wireless Ultraviolet Scattering Communication

Wireless ultraviolet has strong scattering characteristics and can communicate through nonline-of-sight,so wireless ultraviolet communication can be applied to unique application scenarios that cannot be achieved by other wireless optical communications.When ultraviolet signals are transmitted in the actual atmosphere,they are affected by the absorption and scattering effects of atmospheric particles and atmospheric turbulence,resulting in attenuation of ultraviolet signal energy and reduced reliability of the communication system.In this thesis,we mainly study the probabilistic channel model of ultraviolet single scattering communication,establish the link model of ultraviolet non-line-of-sight single scattering communication,propose a photon detection probability estimation method for ultraviolet single scattering communication,and then analyze and study the communication characteristics of ultraviolet.The main research work includes:(1)This thesis establishes a probabilistic channel model for ultraviolet non-line-of-sight single scattering photon detection,and proposes a photon detection probability estimation method for wireless UV communication,which can calculate the photon probability of ultraviolet transmission signals faster and can quickly evaluate the performance of ultraviolet communication systems in complex atmospheric environments.(2)In this thesis,the ultraviolet atmospheric turbulent single scattering communication link model and the UV non-line-of-sight single scattering communication model for different communication scenarios are established,and the ultraviolet communication characteristics in horizontal communication,oblique range communication and vertical communication scenarios are simulated and analyzed.The ultraviolet communication performance of diurnal atmospheric turbulence in three different communication scenarios is compared and analyzed,including the effects of communication distance,altitude,turbulence intensity,and geometric parameters such as the elevation angle of the transmitter and receiver,beam divergence angle,and receiving field of view on the light intensity distribution characteristics,signal-to-noise ratio,and signal attenuation.The simulation results verify the correctness of the proposed communication model and allow a more accurate analysis of the ultraviolet optical communication system performance.(3)Based on the established ultraviolet link models in different communication scenarios,the communication performance of wireless ultraviolet under non-uniform atmospheric conditions is investigated using rural and urban mixed aerosol models.The effect of different relative humidity on the path loss,signal-to-noise ratio,bit error rate,and channel capacity of ultraviolet scattering communication in horizontal,slant-range,and vertical communication scenarios with mixed rural and urban aerosols when the effect of atmospheric turbulence is considered is simulated and analyzed.