机载箔条弹雷达回波的建模与仿真  

Modeling and simulation of echo of aircraft target with chaff

作　　者：陈宇凯[1] 李金梁[1] 李永祯[1] 肖顺平[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《航天电子对抗》2011年第4期24-26,30,共4页Aerospace Electronic Warfare

基　　金：973国家重大基础研究项目(61390)

摘　　要：飞机目标通常抛撒箔条弹来干扰雷达的工作。针对这一作战场景,首先研究分析了飞机与箔条的运动特性和雷达回波特性,导出了对于地基防御雷达而言,箔条弹在时域上可视为点目标、在多谱勒域上可不考虑其多谱勒展宽效应的结论。在此基础之上,建立了箔条干扰的数学和仿真模型,模拟并分析了飞机加箔条的运动状态和雷达回波特性。研究成果有助于揭示箔条干扰的雷达特性,评估箔条的干扰效果。Aircraft targets often dispense chaff to jam radar＇s working.Aiming at this scene,firstly,the motion characteristics and electromagnetic scattering properties of the plane and chaff are analyzed.According to the analysis,it is concluded that for the ground based radar,the chaff cloud can be regarded as a point target in the time domain and its Doppler stretch can be ignored in the frequency domain.On this basis,the correlative mathematical model and simulation model are established.Then,the state of motion and the characteristics of radar echo of the plane with chaff are simulated.The production is useful to explain the electromagnetic properties and evaluate the effect of chaff jamming.

关 键 词：箔条干扰 电磁散射 点目标 仿真模型 多谱勒展宽 

分 类 号：TN974[电子电信—信号与信息处理]