Study On Characteristic Of Non-line-of-sight Ultraviolet Pulse Scattering Propagation

This paper mainly study the non-line-of-sight scattering ultraviolet pulse transmission characteristics, the main work includes the following aspects:1. We introduce the atmospheric composition, distribution and other physical properties. Combined with the Mie particle scattering theory, we analyze the single particle scattering phase function and scattering coefficient of the ultraviolet band in the typical weather conditions.2. Based on the ellipsoid ultraviolet single scattering model, we analyze the effect of the ultraviolet pulse broadening characteristics by numerical calculation method. Pulse width is affected by the transceiver of geometrical parameter and transceiver mode. We should choose short distance and oblique transceiver mode to reduce pulse width. Study the characteristics of ultraviolet pulse scattering propagation of the unequal height transceiver model, if the sending and receiving system under the same level, the value of received energy density will be the largest. We simplify the single scattering model, and reduced the computational complexity. The results match well with single scattered ellipsoid model.3. Based on the Monte Carlo directed probability method, we study the characteristics of ultraviolet multi-scattering pulse broadening, and discuss the effect of transceiver angel and transmission distance on pulse width, time delay and power density. We analyzed the effect of weather on transmission loss, and compare the pulse propagation characteristics of the ellipsoidal coordinate single-scattering model and the Monte Carlo multi-scattering model. The simulation results show that using the multi-scattering numerical calculation method, we can get the result that the pulse broadening is more serious, the time delay is shorter, the received power density is bigger and the transmission loss is smaller.