雷达相关杂波的建模与仿真研究

Research on Modeling and Simulation of Radar Coherent Clutter

为了研究杂波环境下的信号处理问题,需要对雷达杂波环境进行建模与仿真。文中归纳了雷达杂波的统计模型,包括幅度分布和功率谱模型,以及杂波的相应类型,并对服从一定幅度分布和功率谱分布的相关杂波序列产生方法进行了分析,给出了每种统计模型的仿真过程,最后根据杂波仿真的两种主要方法——无记忆非线性变换法ZMNL和球不变随机过程法SIRP对相关杂波进行了仿真,解决了仿真过程中成型滤波器的设计和特殊函数求值问题。仿真结果表明,用文中所述方法进行仿真可得到较好的结果。

In order to make research on the signal processing problem under the clutters, it is necessary to model and simulate the radar environment. This paper summarizes the statistical models of radar clutters, including amplitude distribution and power spectrum models, as well as the corresponding types of clutter, analyses some methods of generating clutter series that submit to amplitude distribution and power spectrum distribution, and presents the simulation process of each model. At last, the simulation is implemented by use of two main methods ZMNL and SIRP, and the design of the shaping filter and the evaluation of special function during the simulation are solved. Simulation results show that the methods described in this paper obtain better results.