A coherent false target jamming method based on random frequency pulling

Abstract

In view of the characteristics of frequency-stepped radar seekers, which possess high resolution and strong anti-interference capabilities, this paper proposes a random frequency-pulling coherent false target jamming method. This method selectively stores and forwards sub-pulse signals, and introduces random frequency offsets, phase perturbations, and time delays to disrupt the coherence consistency of the frequency-stepped radar during the range profile synthesis process, thereby distorting and diffusing the target echo structure. Compared with traditional noise suppression jamming and DRFM store-and- forward jamming, this method not only generates multiple false targets but also causes the target range profile to exhibit broadening, splitting, and drift, thus providing stronger concealment and anti-countermeasure capabilities. The analysis results show that this method can effectively degrade the radar imaging quality without significantly increasing jamming power, but it poses higher requirements on signal reconnaissance accuracy and system control capabilities.