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XU Zhenyang, LI Liang, LI Guangyuan, et al. A three-channel sar-gmti multi-domain barrage jamming method based on composite modulation[J]. Journal of Radars, in press. doi: 10.12000/JR26054
Citation: XU Zhenyang, LI Liang, LI Guangyuan, et al. A three-channel sar-gmti multi-domain barrage jamming method based on composite modulation[J]. Journal of Radars, in press. doi: 10.12000/JR26054
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A Three-channel SAR-GMTI Multi-domain Barrage Jamming Method Based on Composite Modulation

DOI: 10.12000/JR26054 CSTR: 32380.14.JR26054
  • 1.

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China

  • 2.

    University of Chinese Academy of Sciences, School of Electronic, Electrical and Communication Engineering, Beijing 100049, China

Funds:  The National Natural Science Foundation of China (62501577)
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  • Corresponding author: LI Guangyuan, ligy1990@163.com
  • Received Date: 2026-03-04
  • Rev Recd Date: 2026-05-22
    • Available Online: 2026-05-26
    Abstract
  • Traditional barrage jamming in single-jammer jamming of a Synthetic Aperture Radar (SAR) operating in Ground Moving Target Indication (GMTI) mode creates blind zones, increasing the risk of target exposure. Simultaneously, the motion of real targets causes azimuth energy broadening and position shifts, further increasing the requirements for jamming power and coverage. Although multi-jammer signal cooperation can alleviate these problems, it increases hardware costs and is limited to fixed SAR azimuth directions, complicating deployment. To address these issues, this paper proposes a barrage jamming signal control method based on four-phase composite modulation. This method generates false point targets with moving target defocusing and shifting characteristics through motion phase compensation. It controls the position of each barrage subregion using a subregion positioning phase and a central position control phase. Simultaneously, it adjusts the two-dimensional scale of noise points using a multi-scale noise template phase. The synergistic interaction of these four phases enables a single jammer to rapidly produce multi-region barrage jamming with controllable noise scale, moving-target-like defocus, and offset features, thereby achieving synchronous barrage jamming of multiple nearby moving targets. The generated barrage jamming region exhibits azimuth defocusing characteristics similar to those of a real moving target, ensuring that the defocus length of the noise points is highly similar to that of the real target. The azimuth offset of the barrage jamming is within the allowable error range relative to the position of the real target, ensuring that the barrage after azimuth offset effectively covers the imaging position of the moving target on the SAR image. After multi-channel displaced phase center antenna–along track interferometric processing, both the real moving target and the barrage interference region are corrected to the same azimuth position, thus effectively protecting multiple moving targets. Theoretical analysis and simulation validation provide a quantifiable evaluation standard for the three-channel SAR-GMTI jamming techniques.

     

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