A Joint Design Method of Waveform and Filter With High Doppler Tolerance and Anti-Interrupted Sampling Repeater Jamming Capability

Abstract

Interrupted sampling repeater jamming (ISRJ) is a coherent jamming technique combining both deception and suppression capabilities, posing a serious threat to pulse-Doppler radar. Although existing studies have proposed various waveform design methods to counter the ISRJ, these approaches often struggle to balance jamming suppression performance and Doppler tolerance, limiting their practical application in high-speed target detection scenarios. To address this issue, a joint waveform and filter design method is proposed based on a time-domain masking principle. Precisely, the operational waveform and the operational filter adopt a linear frequency modulation (LFM) scheme to preserve Doppler tolerance, meeting the detection requirements for moving targets; whereas the masking waveform and the masking filter are designed using phase-coded sequences. An objective function is formulated by combining the jamming integration energy and the squared absolute deviation of the pulse compression peak gain from predefined thresholds. Further, a joint optimization framework based on block coordinate descent (BCD) and majorization-minimization (MM) are employed to iteratively solve for the masking waveform and filter. In addition, the Lanczos method is introduced to reduce the computational burden of the proposed algorithm. Finally, simulation results demonstrate that the proposed joint design algorithm effectively suppresses ISRJ while maintaining satisfied Doppler tolerance. Compared with existing methods, the designed waveform and filter exhibit superior performance in both antijamming capability and Doppler adaptability.