Modeling And Simulating For Atmospheric Channel In Laser Communication

Atmospheric laser communication has many kinds of advantages: including its big message capacity, does not occupy the original communication band, convenient to build the network and so on. This kind of communication technology is becoming quite attractive and good prospects. But at the same time, atmospheric laser communication can receive a series of influences from atmospheric stochastic channel. Result in depressing the quality of optical communication. This is an important factor which restricts free space optical communication. Presently, the transmission issue arouses pervasive recognition. Making thorough research on the influence of the atmospheric stochastic channel works on laser communication, and grasping the characteristic of laser beam in free space optical communication are able to provide data and the reference value to design and realize the laser communication system. And it has vary important significance.Prime task in this paper is as follows: To study the atmospheric stochastic channel' characteristic. Make in-depth analysis of Atmospheric attenuation effect and Atmospheric turbulence effect. Base on the influence which atmospheric turbulence makes to laser transmission, combine with diffraction theory and laser transmission characteristic to model for atmospheric turbulence channel. According to this channel model, use computer to simulate the laser far-field facula. Based on different factors to carry out the facula real time display. And then according to the research on atmospheric channel, propose method to improve the atmospheric laser communication. It has great application value in project.