Wavelet Packet Decomposition-Based Anti-ISRJ Method for LFM Radar
ZHANG Yu
GUO Yiduo
ZHANG Qiuyue
FENG Cunqian
Abstract：This study addresses the significant impact of interrupted-sampling repeater jamming(ISRJ)on linear frequency modulated radar target detection performance by introducing a novel anti-jamming tech-nique grounded in wavelet packet decomposition.The proposed method innovatively constructs a jamming suppression framework based on invariant feature extraction,leveraging waveform prior information of ra-dar signals.This approach overcomes the limitations associated with traditional strategies centered around"jamming parameter estimation+jamming suppression",which are prone to loss of target information.Experimental results indicate that the method demonstrates superior capability in preserving target infor-mation under conditions of low jamming-to-signal ratio,high overlap of jamming and target signals,and complex jamming scenarios,outperforming conventional time-domain and time-frequency domain methods by achieving target information loss of less than 1.67%.The method significantly enhances target detec-tion accuracy,showing robust performance in complex jamming environments and effectively mitigating ISRJ-induced jamming,thus exhibiting substantial application potential.
Keywords：ISRJwavelet packet decompositionanti-jamming
Publication Date：2025-10-25
Online Publishing Date：2025-10-17(First online date of this platform, not the publication date of the document)
Pages：12( 42-53 )