Systems Engineering and Electronics ›› 2026, Vol. 48 ›› Issue (1): 106-118.doi: 10.12305/j.issn.1001-506X.2026.01.11

• Sensors and Signal Processing • Previous Articles     Next Articles

Anti-interrupted sampling repeater jamming method based on row-clustering in time-frequency domain

Qi ZHONG(), Shaoren WEI, Zhiyi HE, Jianxin LIU   

  1. Beijing Institute of Remote Sensing Equipment,Beijing 100854,China
  • Received:2024-08-15 Online:2026-01-25 Published:2026-02-11
  • Contact: Qi ZHONG E-mail:zhongqi5928@163.com

Abstract:

To suppress interrupted sampling repeater jamming, a row clustering method is proposed, which exploits the differences in the time-frequency distributions between the target echo and the jamming signal. First, the short-time Fourier transform is applied to the received signal after matched filtering to obtain its time-frequency representation. Then, clustering is performed along the frequency dimension of the threshold-processed time-frequency data to extract the signal bandwidth information at different time-domain sampling points. Based on the obtained bandwidth characteristics, it is determined whether interrupted sampling repeater jamming is present in a given time-domain sample. Finally, a time-frequency filter is constructed by using the jamming identification results to suppress the interference. Simulation results demonstrate that the signal-to-interference ratio of the radar received signal contaminated by jamming is significantly improved after processing with the proposed method, validating its effectiveness in suppressing interrupted sampling repeater jamming.

Key words: interrupted sampling repeater jamming, short-time Fourier transform, clustering, interference suppression

CLC Number: 

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