An Interference Method Based on Periodic Sawtooth Wave Phase Modulation

This paper proposes a new jamming method for linear frequency modulation radar: sawtooth wave phase modulation repeater jamming. The LFM signal is phase modulated by the periodic sawtooth waves and then forwarded out. It causes the LFM echo to spread in pairs in the range frequency domain, and the interference spectrum covers the frequency domain range of the distance image, confusing the LFM distance image. The advantage of this jamming method is that the jamming signal and the target echo have the same kernel function in the frequency domain. Because it is coherent jamming, it can obtain a certain pulse compression gain. The article provides a detailed signal design model of sawtooth wave phase modulation repeater jamming, and conducts a detailed analysis of the signal. Simulation experiments verify the effectiveness of this method.