A time-frequency filtering method against interrupted sampling repeater jamming based on histogram energy analysis

Zijian Wang; Yi Wang; Jiamu Li; Wenbo Yu; Zhongjun Yu; Desheng Zhang

doi:10.1117/12.2667396

10 February 2023 A time-frequency filtering method against interrupted sampling repeater jamming based on histogram energy analysis

Zijian Wang, Yi Wang, Jiamu Li, Wenbo Yu, Zhongjun Yu, Desheng Zhang

Author Affiliations +

Proceedings Volume 12552, International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022); 125522H (2023) https://doi.org/10.1117/12.2667396
Event: International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022), 2022, Kunming, China

Abstract

Interrupted sampling repeater jamming (ISRJ) is a new type of coherent jamming for wideband radar systems. By copying and repeatedly forwarding the radar transmitting signal slice by slice, ISRJ can generate a series of false targets in the range direction, which significantly impairs radar’s ability to detect and track targets of interest. Therefore, an advanced time-frequency (TF) filtering method for ISRJ suppression is proposed in this paper. Firstly, the radar received echo signal is transformed into TF domain through short-time Fourier transform (STFT). Secondly, based on the discontinuity and high intensity of ISRJ, the ISRJ contaminated regions can be mapped precisely in the TF image by means of histogram energy analysis and subsequent TF energy accumulation. Finally, these regions are removed by a constructed adaptive filter and the jamming-free pulse compression (PC) results can be obtained. Simulation results reveal that, compared with other competing filtering methods, the proposed method can effectively suppress ISRJ and show better robustness under different circumstances.

Citation Download Citation

Zijian Wang, Yi Wang, Jiamu Li, Wenbo Yu, Zhongjun Yu, and Desheng Zhang "A time-frequency filtering method against interrupted sampling repeater jamming based on histogram energy analysis", Proc. SPIE 12552, International Conference on Geographic Information and Remote Sensing Technology (GIRST 2022), 125522H (10 February 2023); https://doi.org/10.1117/12.2667396

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KEYWORDS

Radar

Histograms

Interference (communication)

Digital filtering

Image filtering

Signal processing

Fourier transforms

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