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As an advanced form of coherent jamming, interrupted sampling repeater jamming (ISRJ) can generate a series of false targets after pulse compression. To mitigate the effects of multiple time-aliasing ISRJ signals, this paper proposes a filtering design method based on the phase-coded linear frequency modulated (PC-LFM) waveform. By utilizing the decoding operation to attenuate signals at non-current time delays, ISRJ signals can be identified in the derived range profile, facilitating the construction of the interference subspace. Consequently, an oblique projection filter is derived in the time-distance domain to effectively suppress ISRJ interference. Simulation results demonstrate the effectiveness of the proposed ISRJ suppression method, even in the presence of multiple jamming sources.

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A Time-Distance Domain Filtering Method Based on the PC-LFM Waveform to Counter Interrupted Sampling Repeater Jamming

  • 会议论文

  • 发表日期：

    2026年

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  • Yi Bu,
  • Jiahui Chen,
  • Wei Yu,
  • Xianxiang Yu,
  • Guolong Cui,
  • Tian Liu

摘要

As an advanced form of coherent jamming, interrupted sampling repeater jamming (ISRJ) can generate a series of false targets after pulse compression. To mitigate the effects of multiple time-aliasing ISRJ signals, this paper proposes a filtering design method based on the phase-coded linear frequency modulated (PC-LFM) waveform. By utilizing the decoding operation to attenuate signals at non-current time delays, ISRJ signals can be identified in the derived range profile, facilitating the construction of the interference subspace. Consequently, an oblique projection filter is derived in the time-distance domain to effectively suppress ISRJ interference. Simulation results demonstrate the effectiveness of the proposed ISRJ suppression method, even in the presence of multiple jamming sources.