North Electronic Equipment Institute

Beijing, China

North Electronic Equipment Institute

Beijing, China
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Wu X.-F.,North Electronic Equipment Institute | Wang X.-S.,National University of Defense Technology | Liang J.-X.,North Electronic Equipment Institute
Yuhang Xuebao/Journal of Astronautics | Year: 2012

The modulation jamming method for high-vivid false uniformly-moving targets against SAR-GMTI is proposed by using the imaging characteristics of the uniformly-moving target. Key jamming parameters are determined, and the influence of reconnaissance errors on the jamming effects is analyzed. Besides, the countering performance of the proposed jamming method against GMTI is investigated by using the three-aperture interference cancelling technique. The experimental results indicate that the proposed method is effective to produce false uniformly-moving targets, through which certain ground uniformly-moving targets can be protected against SAR-GMTI. At the same time, the new method is efficient and flexible.


Wu X.-F.,North Electronic Equipment Institute | Liang J.-X.,North Electronic Equipment Institute | Wang X.-S.,National University of Defense Technology | Jiao X.,North Electronic Equipment Institute
Yuhang Xuebao/Journal of Astronautics | Year: 2012

Using the idea of uniformly-accelerating motion modulation for reference, a novel active modulation jamming method of false uniformly-accelerating targets is proposed for countering Synthetics Aperture Radar (SAR)-Ground Moving Target Indication (GMTI) systems. Several key jamming parameters are determined, the jamming imaging result is analyzed, and the influence of reconnaissance errors on jamming performance is discussed. Furthermore, the countering performance of the proposed jamming method against GMTI is investigated by using the tri-antenna interference cancelling technique. Simulation experiments have been done based on the raw data. The result shows that, this jamming signal carries the vivid uniformly-accelerating motion features, and is processed coherently in the range direction and partially coherently in the azimuth direction, thus producing a false image of the uniformly-accelerating target. The proposed method is effective and flexible in engineering.

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