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Advancing Stepped-Waveform Radar Jamming Techniques for Robust False-Target Generation against LFM-CFAR Systems.

Yanqi Wang1,2, Chao Wang1,2, Qingzhan Shi1,2

  • 1College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China.

Sensors (Basel, Switzerland)
|September 28, 2023
PubMed
Summary

This study introduces a stepped frequency jamming technique to improve radar electronic warfare. The method enhances false target generation, significantly reducing true target detection by over 95% against advanced radar systems.

Keywords:
constant false alarm rate detectionfalse target generationlinear frequency modulationradar jammingstepped waveform modulation

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Area of Science:

  • Electronic Warfare
  • Radar Systems Engineering
  • Signal Processing

Background:

  • Advanced radar systems utilize linear frequency modulation (LFM) and constant false alarm rate (CFAR) detection, posing challenges for traditional jamming techniques.
  • Existing jamming methods struggle with uncertainties in target parameters and maintaining effective false target distribution against sophisticated radar defenses.

Purpose of the Study:

  • To develop and evaluate a stepped frequency modulation jamming technique for enhanced false target jamming against LFM-CFAR radars.
  • To improve the robustness and effectiveness of jamming in the presence of target parameter uncertainties.
  • To advance electronic warfare capabilities for improved survivability against modern radar threats.

Main Methods:

  • The study proposes a combination of stepped frequency modulation with full pulse delay/sum repeat jamming.
  • Theoretical analysis and simulation experiments were conducted to correlate jammer parameters (frequency slope, power compensation) with performance metrics (false target distribution, CFAR masking).
  • Adaptive power allocation strategies were employed to mitigate errors arising from parameter uncertainties.

Main Results:

  • The proposed technique effectively creates a dense distribution of false targets around the actual target, even with uncertain parameters.
  • Stepped-waveform modulation provides superior control over false target distribution and CFAR masking compared to existing methods.
  • Simulation results show a reduction in true target detection probability by over 95% under uncertain conditions, outperforming previous approaches.

Conclusions:

  • The stepped frequency modulation jamming technique offers enhanced resilience and effectiveness against LFM-CFAR radars.
  • Adaptive power allocation significantly improves jamming robustness against parameter uncertainties.
  • This research provides design principles for resilient jamming architectures and supports enhanced survivability in electronic warfare scenarios, with potential applications for emerging radar waveforms.