Joint Design Method of Waveform and Mismatch Filter for SAR Multiple Interference Suppression

Synthetic aperture radar (SAR) systems face various interference due to the complex electromagnetic environment nowadays. Waveform design offers a significant degree of freedom for interference suppression. In this paper, a spectrally constrained joint design method is proposed for suppressing interrupted sampling repeater jamming (ISRJ) and radio frequency interference (RFI). The proposed method generates phase-coded waveform and mismatch filter to suppress ISRJ while employs frequency notch for RFI mitigation simultaneously. The majorization-minimization (MM) framework is adopted to solve the non-convex optimization. The simulation results demonstrate that the design can effectively suppress both ISRJ and RFI, while maintaining a spectral constraint.