An Antijamming Method Based on Multichannel Singular Spectrum Analysis and Affinity Propagation for UWB Ranging Sensors

Ultrawideband (UWB) impulse radio system has received extensive attention due to their high resolution and poor interception possibility. But the specific electromagnetic threat posed by its complex work environment cannot be ignored. In all kinds of active jamming signals, smart noise jamming (SNJ) plays an important role in modern radar electronic warfare, and most traditional antijamming methods have less suppression effect. In this article, the mechanism of SNJ on the UWB ranging sensor is discussed first. On this basis, an anti-SNJ method based on multichannel singular spectrum analysis (MSSA) and kurtosis characteristic is proposed. Experiments show that SNJ is more threatening to the UWB system than other noise modulation jamming. And the improved algorithm proposed in this article can suppress the jamming better. After the antijamming processing, the average detection probability can reach more than 95%. Meanwhile, the method is improved by adding the affinity propagation (AP) clustering algorithm to solve the underdetermined signal separation problem in the case of compound jamming. The advantage is that it does not have to estimate the number of signals first. Even if the signal-to-jamming ratio is −10 dB, the waveform similarity between the separation signal and the source signal can reach 0.7 or more.