False Targets Suppression of Integral Power Frequency Modulated Waveform for Countering Interrupted Sampling Repeater Jamming

The false targets generated by interrupted sampling repeater jamming (ISRJ) bring serious threats to radar target detection and imaging. Transmitted waveform design with joint processing has become a promising way to deal with them. In this letter, the ambiguity function (AF) of the integral power frequency modulated (PFM) waveform is derived. Meanwhile, the time-frequency characteristic of the ISRJ signal received by the radar is analyzed on the range-Doppler plane. In consideration of the range-Doppler coupling characteristic, an improved Doppler filtering processing method is proposed to suppress the jamming of false targets. Simulation results demonstrate that the selected PFM waveform with the proposed joint processing method can effectively suppress the false targets resulting from ISRJ.