中文摘要：

该文提出一种对SAR-GMTI的遮蔽干扰方法。该方法将截获的SAR信号进行间歇采样并对其运动调制后转发出去,利用运动调制效应在方位向上产生展宽和间歇采样转发在距离向上产生周期延拓的多假目标,二者结合形成灵巧遮蔽干扰效果,且干扰经多通道对消后无法被对消。此干扰独特之处在于能够将干扰能量仅出现在需要遮盖的运动目标上,从而更有效地利用了干扰能量。以三通道干涉对消为例着重分析了该方法对多通道GMTI的干扰原理。仿真实验证明了此干扰方法的正确性和有效性。

英文摘要：

In this paper, we present a shading jamming method for the Synthetic Aperture Radar and Ground Moving Target Indicator（SAR-GMTI）. This method begins with intermittently sampling intercepted SAR signals, performing motion modulation, and then transmitting them. The motion modulation of SAR signals can produce a motion modulation effect and intermittent sampling repeater jamming can produce multi-fronted and lagged false targets along a range. Their combination provides a jamming effect of smart shading areas,which can＇t be cancelled after multi-channel cancelling. The uniqueness of this jamming method is that the energy only appears on the moving target to be covered, so less jamming energy is needed. We analyzed the proposed jamming principle against GMTI using the tri-channel interference cancelling technique. Our simulation results verify our analyses and confirm its jamming effectiveness for SAR-GMTI.