随机粗糙海面的多路径海杂波频谱数值模拟

海杂波干扰影响雷达制导性能,对各海况物理条件下海杂波的数值模拟可用于实验室海杂波仿真、制导雷达的设计、监测性能的分析等.本文采用一种海面起伏双尺度近似模型进行多路径海杂波频谱的数值模拟,通过谱拟合模拟时变随机粗糙海面,计算收发高度和间距给定条件下海面多路径有效散射面积,计算接收点电场强度、雷达双站散射系数以及接收点功率谱密度(海杂波频谱).

Numerical Simulation of Multi-path Clutter Spectrum of Randomly Rough Oceanic Surface

Oceanic clutter can significantly affect the radar guidance performance.Numerical simulation of oceanic clutter under various oceanic situations is applicable to simulating clutter in the laboratory,designing the guidance radar and analyzing the radar surveillance.This paper numerically simulates the oceanic spectrum of multi-path clutter with employing the bi-scale model of rough sea surface and making use of the oceanic spectrum to model the time-varying randomly rough oceanic surface.When the heights of the transmiter and receiver,and their distance are given,the effective area of scattering is calculated.Bistatic scattering field E(t) and power spectrum of the receiver(oceanic clutter spectrum) are numerically simulated.