基于相干K分布模型的二维海杂波分析与仿真  

Analysis and Simulation of Two-dimensional Sea Clutter Based on Coherent K-distributed Model

作　　者：杨俊岭[1] 程翥[1] 黄晓斌[1] 万建伟[1] 

机构地区：[1]国防科技大学4院1所信号处理教研室,长沙410073

出　　处：《信号处理》2007年第4期512-515,共4页Journal of Signal Processing

摘　　要：提出了一种新的二维相干K分布杂波建模与仿真方法。根据K分布杂波两个正交分量可由两列独立的高斯矢量加权乘积和构成的原理,分别推导了K分布序列实、虚部的自、互相关性,然后应用二维滤波技术,将一维相干杂波仿真方法推广到距离一方位二维空间。相比经典零记忆非线性变换(ZMNL)和球不变随机过程(SIRP)法,它仿真的杂波自相关函数(ACF)可以为任意复数,而且提高了运算速度。最后对实际雷达二维海杂波进行了分析和模拟。A new method for modeling and simulation of coherent K-distributed clutter is presented. With the principle of each quadrature component of K-distributed clutter can be modeled by a weighted sum of products of two independent Gaussian variables, the cross correlation and autocorrelation of the quadrature parts of the clutter is derived. Then, with the two-dimensional （2D） filter technology, the simulation of 2D coherent clutter is extended to range-azimuth 2D space. Compared with ZMNL and SIRP, this method can generate clutter with arbitrary complex ACF, and improve the simulation speed. At last, real radar 2D sea clutter was analyzed and simulated.

关 键 词：K分布 海杂波 二维滤波 Kolmogorov-Smirnov检验 

分 类 号：TN957.51[电子电信—信号与信息处理]