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ECCM Scheme against Interrupted Sampling Repeater Jammer Based on Parameter-Adjusted Waveform Design.

Zhenhua Wei1, Zhen Liu2, Bo Peng3

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Summary
This summary is machine-generated.

This study introduces a new electronic counter-counter measure (ECCM) to defend linear frequency modulated (LFM) radar against interrupted sampling repeater jamming (ISRJ). The method effectively suppresses ISRJ by estimating jammer parameters and designing adaptive transmitted signals.

Keywords:
electronic counter-counter measure (ECCM)interrupted sampling repeater jamming (ISRJ)time-frequency (TF) analysiswaveform design

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Area of Science:

  • Radar Systems Engineering
  • Electronic Warfare
  • Signal Processing

Background:

  • Interrupted Sampling Repeater Jamming (ISRJ) poses a significant threat to coherent radar sensors, particularly those employing Linear Frequency Modulated (LFM) waveforms.
  • Effective countermeasures are crucial for maintaining radar performance in the presence of sophisticated jamming techniques.

Purpose of the Study:

  • To develop a dynamic Electronic Counter-Counter Measure (ECCM) scheme to mitigate ISRJ against LFM radar.
  • To propose a method for estimating key ISRJ parameters and designing adaptive transmitted signals for jammer deception.

Main Methods:

  • Utilized LFM waveform transmission to analyze time-frequency (TF) characteristics and estimate ISRJ parameters (sampling interval, duration, repeater times).
  • Designed a parameter-adjusted intra-pulse frequency coded signal to generate a single false target after matched filtering.
  • Developed two specific ISRJ suppression approaches for varying Jamming Signal Ratio (JSR) and duty cycle scenarios.

Main Results:

  • The proposed ECCM scheme effectively countered ISRJ in simulations across different jamming conditions.
  • Adaptive signal design successfully reduced ISRJ to a single false target, simplifying detection.
  • A trade-off relationship was identified between the two proposed ISRJ suppression approaches.

Conclusions:

  • The developed dynamic ECCM scheme offers a robust solution for LFM radar against ISRJ.
  • Jammer parameter estimation and adaptive signal design are key to effective counter-jamming.
  • The proposed suppression approaches provide flexible options for radar operators facing ISRJ threats.