基于对称Alpha稳定分布的低空杂波建模仿真  

Simulation of Low-angle Clutter Based on Symmetric Alpha Stable Distribution

作　　者：冯子昂 胡国平[1] 周豪[1] 师俊朋 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《计算机仿真》2016年第10期62-65,71,共5页Computer Simulation

基　　金：国家自然科学基金(61372166);陕西省自然科学基础研究计划(2014JM8308)

摘　　要：针对常见的杂波分布模型难以描述低空杂波非高斯、长拖尾和空间相关等特性,且模型适用范围相对有限的问题,提出了基于对称Alpha稳定分布的低空杂波仿真模型,采用球不变随机过程法生成服从对称Alpha稳定分布且空间相关性显著增强的低空杂波。从杂波模型的时间特性、空间相关性和长拖尾特性三个方面进行仿真分析,仿真结果表明,与常见的杂波模型相比,对称Alpha稳定分布模型能够较好地描述低空杂波非高斯、长拖尾和空间相关的分布特征,且适用性更广泛。The common clutter distribution models are difficult to describe the non- Gaussian,long tailed and spatial correlation properties of low attitude clutter,and the model application scope is relatively limited. To solve these problems,a clutter simulation model based on symmetric alpha stable（ SαS） distribution is presented. Spherically Invariant Random Processes（ SIRP） is applied to generate the low attitude clutter which follows the symmetric Alpha stable distribution and enhance spatial correlation. Simulation analysis is carried out from time characteristics,spatial correlation and long tailed characteristics of the clutter model. The simulation results show that,compared with other common clutter distributions,the symmetric alpha stable distribution not only has better performance in describing the characteristics of low attitude clutter,but also has more extensive applicability.

关 键 词：对称阿尔法稳定分布 球不变随机过程 低空 杂波仿真 

分 类 号：TN953[电子电信—信号与信息处理]