Journal of Astronautics ›› 2012, Vol. 33 ›› Issue (6): 736-745.doi: 10.3873/j.issn.1000-1328.2012.06.008

• E&IE • Previous Articles     Next Articles

A Novel Jamming Method for Dechirping ISAR Based on Micro-Doppler Effect

LI Song1, HE Jin2, FENG You-qian4, LIU Chang-yun1, ZHANG Qun2,3   

  1. 1. Missile Institute, AFEU, Sanyuan 713800, China; 2. Telecommunication Engineering Institute, AFEU, Xi’an 710077, China; 3. Key Laboratory of Wave Scattering and Remote Sensing Information, Fudan University, Shanghai 200433, China; 4. Science Institute, AFEU, Xi’an 710077, China 
  • Received:2011-06-24 Revised:2012-05-04 Online:2012-06-15 Published:2012-06-20

Abstract: A novel algorithm for ISAR (inverse synthetic aperture radar) jamming based on the micro-Doppler effect is proposed in the paper. A deception jamming method is presented first, in which the radar signals are repeated by the jammer with additional illusive micro-Doppler signatures after frequency-shift and amplitude-modulation. When receiving these jamming signals, the imaging radar will be confused. On the other hand, because of the additional modulation of the micro-Doppler effect to the radar echoes, the illusive micro-Doppler signals transmitted by the jammer can reduce the correlation between the range profiles, distort the initial phases, and form interference stripes along the azimuth direction. Therefore, another “smart” barrage jamming method is presented based on the micro-Doppler effect. The results of both simulated and measured data prove the effectiveness of these methods with relatively low jam-to-signal ratio.

Key words: Deception jamming, Barrage jamming, Micro-Doppler, Radar imaGing, Target recoGnition