随机粗糙海面的多路径海杂波频谱数值模拟  

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

作　　者：李彦佐[1] 金亚秋[1] 

机构地区：[1]复旦大学波散射和遥感信息国家教育部重点实验室,上海200433

出　　处：《微波学报》2005年第4期6-11,15,共7页Journal of Microwaves

基　　金：国家重点基础研究项目(2001CB309405);国家自然科学基金资助项目

摘　　要：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)。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 multl-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.

关 键 词：海杂波 波高频谱 波高波数谱 波高方向谱 闪烁表面 双尺度模型 数值模拟 粗糙海面 杂波频谱 多路径 随机 制导雷达 制导性能 功率谱密度 干扰影响 

分 类 号：TN954[电子电信—信号与信息处理]