相干视频地杂波模拟的通用仿真模型

An Universal Simulation Model of Clutter in Radar Coherent Video Echo Simulation

针对相干视频地杂波模拟中非高斯相关随机序列的产生,提出一种通用的仿真模型。使用迭代算法和随机向量法完成零记忆非线性变换过程,迭代算法用来计算非线性变换过程中高斯序列相关性的变化,而随机向量法用来完成线性变换,仿真实验数据证明利用这两种方法可精确地产生具有指定概率密度和功率谱的非高斯相关随机序列,逼真地复现既包含振幅又包含相位的雷达相干视频散射信号。同时给出了迭代算法使用过程中的注意问题及地杂波模型仿真的过程。

This paper describes an universal simulation model to generate the non-Gaussian correlated random sequence for the video echo simulation of clutter. An empirical iteration method and a random vector method are proposed to process the translation by zero-memory nonlinearities. The iteration method is developed to calculate the covariance function of Gaussian process by nonlinear translation, and the random vector method is developed to implement the linear translation. The simulation results show that using the two methods we can generate non-Gaussian correlated random sequence with desired probability density functions and covariance functions and reproduce the scattered coherent video signal of radar. The key points of using the iteration method and the simulation process of ground clutter are also given in this paper.