Electronics and Electrical Engineering and Control

A SAR scene deceptive jamming method based on range convolution and azimuth multiplication modulation

  • Penghui JI ,
  • Shiqi XING ,
  • Dahai DAI ,
  • Bo Pang ,
  • Dejun FENG
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  • College of Electronic Science,National University of Defense Technology,Changsha 410073,China

Received date: 2022-11-07

  Revised date: 2022-11-21

  Accepted date: 2022-12-22

  Online published: 2022-12-27

Abstract

To reduce the real-time computational amount and requirement for reconnaissance parameters and maintain the fidelity of false scenes in Synthetic Aperture Radar (SAR) scene deceptive jamming, this paper first proposes a fast implementation method of SAR azimuth multiplication modulation jamming. Through a reasonable approximation of the slant distance from the SAR sensor to the target point, SAR azimuth multiplication modulation jamming is able to be used in combination with SAR range convolution modulation jamming for jamming SAR. On this basis, a SAR scene deceptive jamming method is proposed based on range convolution and azimuth multiplication modulation. Based on the two-dimensional Fourier transform of the spoofing template, this method constructs a series of slow-time frequency domain response functions before jamming, and then obtains the jamming modulated signal by real-time resampling in the azimuth direction, which can significantly reduce the computational effort and the demand for reconnaissance parameters, and at the same time maintain the fidelity of the false target. The method is also able to jam the complex waveform SAR due to the use of convolutional modulation in the range direction. Theoretical analysis and simulation experiments verify the effectiveness of the proposed method.

Cite this article

Penghui JI , Shiqi XING , Dahai DAI , Bo Pang , Dejun FENG . A SAR scene deceptive jamming method based on range convolution and azimuth multiplication modulation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(18) : 328235 -328235 . DOI: 10.7527/S1000-6893.2022.28235

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