韦布尔和对数正态分布雷达杂波模型可描述海杂波的分布,但实现模型不同,且不能对杂波物理成因做出合理解释.这里提出一种非中心化chi平方伽玛分布模型,可精确地模拟海杂波,概率分布特性可与上述两者接近,并且能从物理含义说明杂波产生机理.模拟结果的概率密度分布和功率谱密度估计显示出这种模型具有很好的性能.

Traditionally,Weibull and lognormal radar clutter models are based on reasonable fits to measured clutter densities,rather than any interpretation of clutter physical mechanism.And,furthermore,they use different models.A generalized clutter model,the noncentral chi-square gamma distribution model is presented in this paper,which is based on physical laws and is capable of well matching the characters of the two distributions mentioned above.Probability distributions and power densities of the simulation results demonstrate the accuracy of the technic.