摘要
逆合成孔径雷达(ISAR)经常采用解线调处理的方法来得到频域距离像。根据这一特点,提出一种距离欺骗的干扰方法,即对雷达发射的窄谱脉冲进行距离波门拖引干扰,使雷达获得错误的参考距离信息,给出错误的本振信号,从而使解线调后的频域点扩展函数展宽甚至相互交迭,降低频域距离像质量或者完全破坏频域距离像。这种方法巧妙利用了解线调处理的特点,简单易实现,且对干扰功率的要求较低。
For the reduction of sampling bandwidth, inverse synthetic aperture radar （ISAR） echoes are usually dechirped firstly in the receiver. Then the dechirped signal employs FFT to get the range image in frequency domain. A new method named range pull-off jamming is proposed, which is based on the feature of dechiping. The narrow band pulse is jammed by range pull-off, and then radar obtains a false range value and produces a false reference signal. So the point-spread function （PSF） in the frequency domain will be widen or folded and imaging will be worsen or destroyed. Theoretical analysis and computer simulation justify the validity and efficiency of the new jamming technique.
出处
《电子信息对抗技术》
2009年第2期47-50,共4页
Electronic Information Warfare Technology
基金
国家部委973项目(513010101)
关键词
电子对抗
距离欺骗干扰
解线调处理
点扩展函数
逆合成孔径雷达
electronic countermeasures
range pull-off jamming
dechirping
point-spread function
inverse synthetic aperture radar
