The Study And Simulation On Atmospheric Optical Communication Channel Model For South China Sea

Atmospheric laser communication has been a research focus in the field of wireless communication, it is a digital communication system transmitted by laser or optical plus in the atmosphere. It is also called "Wireless Optical Communication" and enjoys a good reputation with "virtual fiber". Atmospheric laser communication both has microware and laser communication's advantages. Further more. it is structured with some inimitable characters such as unlimited bandwidth, no frequency admission, low cost, strong anti-jamming, good transmission secrecy, ease and speed of deployment and so on. Because such a lot of factors as atmospheric scattering, refracting, turbulence, etc. in the course of transmitting in the atmospheric laser communication system will cause the energy of laser to decay, strength of laser to fluctuate, the random deflection of the light beam, it is a key to overcome the influence. So the study on atmospheric laser communication channel seems extremely important.This paper has narrated and analyzed the effect of atmospheric random channel to wireless laser communication and light transmit and receive correspond to wireless optical communication, in addition we detailed analysis of various factors on the bit error rate(BER). Then the paper provide the channel model based on it and communication theory, and combined with the South China Sea to simulate the atmospheric properties. On the basis of these figures, we can observe the change and distribution of laser energy goes through affected by atmospheric, space loss, and other external environment with all kinds of figure. Through in-depth analyzed of various external factors on the atmospheric optical communication systems. We brought forward a few of methods to reduce influence of air boundary layer for the further development of high performance communication system to lay a good theoretical basis.