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A Coherent Parameter Estimation Method for Distributed Coherent Jamming Systems.

Liang Qi1,2, Jianjiang Zhou2

  • 1School of Electronic Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

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|March 14, 2026
PubMed
Summary
This summary is machine-generated.

Accurate estimation of distributed coherent jamming system (DCJS) parameters is crucial for radar. A new frequency-domain method enhances coherent parameter estimation accuracy, improving time delay by 27.0% and phase difference by 8.3%.

Keywords:
coherent parameters estimationdistributed coherent jamming system (DCJS)generalized cross-correlationsynthesis efficiency

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Area of Science:

  • Radar Systems Engineering
  • Signal Processing
  • Electronic Warfare

Background:

  • Accurate estimation of coherent parameters is vital for distributed coherent jamming systems (DCJS) in active radar.
  • Existing generalized cross-correlation function weighting methods suffer from reduced estimation accuracy due to whitening processing, impacting DCJS synthesis efficiency.

Purpose of the Study:

  • To develop a novel method for accurate coherent parameter estimation in DCJS.
  • To address the limitations of current methods that impair estimation accuracy and system efficiency.

Main Methods:

  • Established a transmit-receive signal model for DCJS with coherent parameter estimation errors.
  • Analyzed the impact of generalized cross-correlation function weighting on estimation accuracy.
  • Proposed a new coherent parameter estimation method based on frequency-domain feature matching.

Main Results:

  • The proposed frequency-domain feature matching method preserves intra-pulse signal features.
  • This preservation leads to significantly improved coherent parameter estimation accuracy.
  • Simulation results demonstrate a 27.0% improvement in time delay estimation and an 8.3% improvement in phase difference estimation compared to existing algorithms.

Conclusions:

  • The frequency-domain feature matching method offers a superior approach for coherent parameter estimation in DCJS.
  • This method effectively overcomes the accuracy degradation issues associated with traditional techniques.
  • Enhanced estimation accuracy contributes to improved overall performance and efficiency of DCJS in active radar applications.