A novel parameter estimation method of interrupted sampling repeater jamming

Interrupted sampling repeater jamming(ISRJ) is an effective coherent jamming type for wideband chirp radar. Different parameter settings correspond to different jamming strategies, and the generated false target jamming can achieve effects of both deception and suppression. In this paper, a parameter estimation method for ISRJ with intra-pulse modulation is proposed by analyzing the jamming characteristics. The time-frequency(TF) distribution result can be used to determine the jamming strategy. The sampling duration and repeat sampling interval are estimated by Hilbert transform and peak detection, and then sampling number and forwarding times can be calculated. The results of simulation and experimental data prove the validity of this method.