Uv Communication Channel Scattering Model And Experimental System Design

Ultraviolet communication bases on atmospheric scattering with center wavelengths(200-280nm) in the solar blind region. An important and potentially large class of applications for ultraviolet non-line-of-sight(NLOS) communication is short-range, secret communication.It can be considered as a supplement of conventional communication.This paper is mainly about atmospheric channel model along with coding and decoding design for NLOS ultraviolet communication.At first, the communication principle,background,key components have all been briefly described.Research on atmospheric channel model is a difficult issue in ultraviolet communication. In this paper, based on the Luegtten's NLOS single-scattering channel model give an alternative analysis for the single scattering channel model, the model system of non-direct transmission to the loss of signal is divided into absolute and relative loss loss of two forms. At the same time, based on the combination of the simulation results, the model has made consequential amendments. Since the model ignores the launch angle of elevation and elevation of the system to receive the impact of power loss, so it used the analysis of atmospheric scattering is simple and directed.The article then focused on the experimental platform for ultra-violet light communication design. Work in non-direct model, under the conditions of certain parts of the system power to conduct a preliminary cost estimate, and come to the following conclusions: (1) non-line-of-sight ultraviolet communication, the transmission distance in the same under the , the smaller the system to send and receive transmission point of view the smaller the power loss. (2) With the increase in transmission distance, the system power loss increased dramatically.NLOS communication within the scope of the power loss. Ultraviolet light as a result of NLOS a larger communication system transmission loss, so the device should minimize the loss of power on the system, the design process in the system can increase the transmitting power source to improve the detector sensitivity, improve the efficiency of receiving antennas to reduce the starting devices on the system power loss.Finally, under certain conditions in NLOS of power loss for the simulation analysis, based on this single-scattering model based on the ultra-violet light should be inclined to send and receive communications (apex angle and the receiver apex angle are less than 90 o) of the conclusions.