本文提出了一个卫星陆地移动信道的随机模型，并导出了３个主要统计量（概率密度分布函数、电平交叉率、平均衰落时间）．从这一数学模型出发，通过用有限个正弦信号来近似非白高斯噪声过程的方法得到了对应的计算机模型．最后利用ＰＣ机对所提出的计算机模型进行了模拟并与数学模型推导的结果进行比较，计算结果表明这两个模型具有极好的对应性． In this paper, we propose a stochastic model of satellite terrestrial mobile channel and derive three main statistics (probability density distribution function, level crossing rate and average fading time). Starting from this mathematical model, a corresponding computer model is obtained by approximating a non-white Gaussian noise process with a finite number of sinusoidal signals. Finally, the PC model is simulated and compared with the results derived from the mathematical model. The calculation results show that these two models have excellent correspondence.