星载SAR的箔条干扰分析

针对星载合成孔径雷达 (SAR)发射信号和回波信号的特点 ,距离维和方位维信号处理的弱点 ,提出了箔条干扰星载SAR成像的方法。采用光学的处理办法对SAR产生的信号受箔条干扰的机理进行了分析 ,结果表明 :选择适当的箔条特征尺寸和作用距离可使反射或散射后的信号相位和方向改变 ,形成相干的干扰信号进入SAR信号处理单元 ,对成像解算形成干扰。

Chaff Interference Analysis of Space-born SAR

Basing on the analysis of the characteristics of emitted signal and echo signal, aiming at the weakness of signal processing in range dimension and azimuth dimension of space-born Synthetic Aperture Radar (SAR), a chaff interference SAR imaging method is presented. An optical proccessing method is emploged to analyze the interference mechanism. It appears that the phase and direction of reflected or scattered signals are varied by chaff size and operat range, resulting in forming coherent interference signal into the signal processing units and reducing image resolution, as indicated by the analysis results.