A Controllable Suppressed Jamming Area Generation Method Against SAR-GMTI Based on Double Synergetic Jammers

The suppressed jamming area generated using the existing suppressed jamming methods is uncontrollable when against Synthetic aperture radar ground moving target indication （SAR-GMTI） system， which is because of the incoherence between the jamming signal and the target echo causing proliferation in range or azimuth direction. And， the jamming can be partly cancelled by displaced phase center antenna （DPCA） processing because it is generated by only a single jammer. Aiming at the problem above， this paper proposes a controllable suppressed jamming area generation method against SAR-GMTI based on double synergetic jammers. This method uses Doppler modulation and consinusoidal phase modulation to control the azimuth jamming position and suppression range. Meanwhile， shift-frequency modulation and noise convolution modulation are used to control the distance jamming position and suppression range. Besides， double synergetic jammers are utilized to solve the problem that jamming is partly cancelled. Theoretical analysis and experimental results show that the jamming patches generated by the jamming method proposed in this paper can counter the cancellation of SAR-GMTI and protect moving targets. At the same time， because the generated jamming area is accurately controllable， the jamming efficiency is higher and has better performance in engineering practicality.