对合成孔径雷达的随机移频干扰

本文分析了传统移频干扰对合成孔径雷达(SAR)的干扰效果,针对固定移频干扰只能形成点目标或线目标干扰的局限,提出了一种改进的移频干扰新样式——随机移频干扰。理论分析表明脉间去相关的随机移频干扰经SAR距离向和方位向处理,成像输出为距离上占据一定宽度的似噪条带,可用于压制分布目标,克服了固定移频干扰的局限。文中实验部分比较了脉间去相关随机移频干扰和现有的SAR压制干扰样式——噪声干扰和距离调频率脉间去相干干扰的干扰性能,验证了该干扰的有效性。

Randomly-Shift-Frequency Jamming style to SAR

In this paper,the jamming effects of the conventional Shift-Frequency Jamming(SFJ)to Synthetic Aperture Radar (SAR)are analyzed.For its jamming limitation of the fake point target or line target imaging output,an improved SFJ style,Randomly- Shift-Frequency Jamming Style is put forward.The analysis in principle shows that when it losses the correlation property of the pulse-to- pulse,its jamming output imaging after SAR's range and azimuth compressions is a noise-like swath,which covers the part of the range width and the whole of the azimuth.Then it can be used to suppress distributed target,overcoming the defect of the conventional SFJ.The later simulation and experiment denote that the proposed jamming style is superior to current blanket styles to SAR:noise jamming and Unmatched-Slop Jamming with the non-correlation of pulse-to-pulse,test and verify the jamming effect.