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地海杂波对采用前视以及下视成像的机载、弹载雷达具有十分重要的影响,对港口成像,会同时受到地杂波和海杂波的影响。文章提出复合场景杂波的后向散射系数模型,推导了复合场景杂波的幅度分布公式,并对由对数正态杂波与韦伯杂波组成的复合杂波分布进行了仿真。仿真中,地海杂波功率比选取了0.001到50之间的一系列典型值,并将不同情况下复合杂波的幅度分布与单一对数正态分布模型和Weibull分布模型得到的杂波分布进行了比较,结果表明二者的复合杂波分布依赖于二者的功率比。
Ground-sea clutter is very important for on-air and ground-launched radars with forward-looking and downward-looking imaging. For port imaging, both clutter and sea clutter are affected. In this paper, the backscattering coefficient model of compound scene clutter is proposed, the amplitude distribution formula of compound scene clutter is deduced, and the complex clutter distribution composed of log normal clutter and Weber clutter is simulated. In the simulation, a series of typical values between 0.001 and 50 are selected for the clutter power ratio of the sea and the clutter distributions of the amplitude distribution of the composite clutter and the single logarithm normal distribution model and the Weibull distribution model The results show that the composite clutter distribution depends on the power ratio of the two.