Inter-pulse Periodical Shift-frequency Jamming Against Synthetic Aperture Radar

The regular false targets which are generated by the intermittent sampling repeater jamming can be easily recognized. To overcome this disadvantage, an inter-pulse periodical shift-frequency jamming method is proposed against Synthetic Aperture Radar (SAR). Combining the intermittent sampling jamming method with Doppler shift-frequency jamming method, the dense false targets can be produced by sectionalized modulation. Firstly, theoretical analysis shows that the two dimensional dense false targets with suppression effect can be produced ahead of the designated location of the jammer, and the main false target is deviated from the jammer in the azimuth. Moreover, the effect of the jamming and the factors are discussed. Subsequently, the model based on obtaining the jamming parameters is established and the energy compensation coefficient of false targets is also given. Finally, the validity is preliminarily verified by simulation experiments.