Research on anti-Narrowband AM jamming of Ultra-wideband impulse radio detection radar based on improved singular spectrum analysis

Abstract

Considering the problem that the ultra-wideband detection system is susceptible to be jammed, the mechanism of narrowband suppressive jamming on ultra-wideband radio impulse detection radar is mathematically analyzed at first in this paper. As typical suppressive jamming, the noise amplitude modulation signal is selected as research object, and the average signal-to-jamming is defined as an evaluation index. Simulation results show that the center frequency of jamming signal has the most significant influence on the impulse signal among a series of optimal jamming parameters. Afterwards, combined with genetic algorithm, an optimized singular spectrum decomposition method is proposed to realize adaptive extraction of the impulse signal. Error of the reconstructed signal based on proposed method is much smaller than that of threshold methods. The results provide a reference for subsequent anti-jamming and waveform optimization.