A two-dimensional controllable suppression jamming generation method for multi-point source cooperative composite modulation SAR-GMTI

To address the issues of uncontrollable jamming regions and susceptibility to partial cancellation in existing suppression jamming methods against single-point-source synthetic aperture radar ground moving target indication (SAR-GMTI), this paper proposes a two-dimensional controllable suppression jamming generation method using multi-point-source-cooperative composite-modulation for SAR-GMTI. This method employs motion modulation and noise-product modulation to control the azimuth-direction jamming position and range, and frequency-shift modulation and noise-convolution modulation to control the range-direction jamming position and range. Additionally, distributed multi-jammer cooperation effectively mitigates the problem of partial cancellation. Theoretically, the paper derives an analytical expression for the SAR-GMTI jamming imaging results and conducts a detailed analysis of jamming performance. Both theoretical analysis and experimental results demonstrate that the proposed jamming method can generate controllable suppression jamming patches while preventing cancellation by SAR-GMTI processing, thereby achieving moving target protection. Moreover, due to the precise controllability of the generated jamming regions, the method achieves higher jamming efficiency and exhibits good engineering practicality.