A Novel Scattered Wave Deception Jamming Against Three Channel SAR GMTI

Abstract

Many jamming methods have been proposed against three-channel synthetic aperture radar (SAR) ground moving target indication based on the stationary jammer. To generate a verisimilar moving target based on a moving jammer, the scattered wave deception jamming method is proposed against displaced phase center antenna (DPCA) process. The jammer is set at an unmanned aerial vehicle and moves with the protected moving targets. By comparing the slant history range of the echo with that of the jamming signal, the position of the jammer beam footprint and the velocity of the moving jammer are calculated based on the analysis of the range, azimuth, Doppler rate mismatch, and the altitude distortion after DPCA processing. The intercepted SAR signal is retransmitted to the calculated area covered by the jamming beam footprint based on the specific velocity of the jammer. Thus, after DPCA processing, the jamming result is similar to the real moving target. This method reduces the algorithm complexity and avoids the signal jamming modulation compared to traditional methods. The effectiveness and correctness of the algorithm are verified by simulations.

Keywords

• Synthetic aperture radar (SAR)
• ground moving target indication (GMTI)
• displaced phase center antenna (DPCA)
• scattered wave jamming
• deception jamming