Frequency Spot Jamming Against FMICW

In this paper, a new frequency spot jamming is proposed to solve the problem that the conventional repeater jamming cannot generate advance jamming signal and the coherence between the jamming signal and the radar signal is poor. Based on the kay algorithm, a new frequency spot jamming against Frequency modulated interrupted continuous wave radar (FMICW) is designed. First of all, the kay algorithm is used for estimating the instant frequency of each pulse. Secondly, the Least Squares (LS) fitting is used for estimating the chirp rate of pulses. Thirdly, the frequency spot Continuous Wave (CW) signal is generated based on the estimates of instant frequency and chirp rate. And then, the frequency spot CW jamming is modulated by both pulse modulation and frequency modulation. Finally, the parameter controllable pulse frequency spot jamming which can be modulated to advance jamming is generated and transmitted. The simulation results show that the jamming pattern can effectively achieve both advance and delay jamming in the time domain, and it is also possible to mask the peak of the real radar echo spectrum in the frequency domain.