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中文摘要：
大气湍流一直是限制空间激光通信的主要因素。提出了一种模拟大气湍流效应的新方法,在接收端用一对相关的幅度屏与相位屏来模拟大气湍流效应。针对星到地的激光通信,论文先将二重积分形式的幅度自相关、相位自相关以及幅度-相位互相关函数简化为一重积分的形式;然后根据这三种相关函数,基于协方差随机屏模拟方法同时产生一对相关的随机幅度屏与相位屏;并比较了模拟屏的结构函数与理论结构函数的符合度。该方法可有效模拟湍流内、外尺度对湍流效应的影响。
英文摘要：
Atmospheric turbulence is a mainly factor which restricts space laser communication. In this paper, a new turbulence simulation method was proposed. At the receiving position, a pair of correlated amplitude and phase screens was used to simulate the turbulent effects. For the situation of satellite to ground laser communication, firstly, the double infinite integral forms of the amplitude autocorrelation, phase autocorrelation and amplitude-phase cross-correlation functions were reduced to the forms of single integral; and then, according to these correlation functions, a pair of correlated amplitude and phase screens was simulated by using the covariance-based random screen simulation method. The conformities between the simulated structure functions and the theoretical ones were compared. The outer scale and inner scale of atmospheric can be considered in this simulation method.
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