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Related Experiment Video

Updated: Mar 15, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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A Design of FMCW Fuze System and Ranging Algorithm Based on Frequency-Phase Composite Modulation Using Chaotic Codes.

Jincheng Zhang1, Xinhong Hao1, Chaowen Hou1

  • 1Science and Technology on Electromechanical Dynamic Control Laboratory, Beijing Institute of Technology, Beijing 100081, China.

Sensors (Basel, Switzerland)
|March 14, 2026
PubMed
Summary

This study introduces a novel anti-jamming fuze waveform using chaotic modulation and a special ranging algorithm. The new design effectively counters jamming, enhancing radar fuze security.

Keywords:
ambiguity functionanti-intercept abilitychaotic bi-phased code modulationchaotic codelinear frequency modulationradio fuze

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Area of Science:

  • Radar Systems Engineering
  • Signal Processing
  • Chaos Theory Applications

Background:

  • Traditional linear frequency-modulated continuous wave (FMCW) fuzes are vulnerable to jamming due to fixed modulation parameters.
  • Jamming techniques like DRFM and sweep-frequency jamming exploit these fixed parameters to disrupt fuze operation.

Purpose of the Study:

  • To propose a novel fuze waveform design scheme to enhance anti-jamming capabilities.
  • To overcome the distance-Doppler coupling and spectral dispersion issues in variable-slope modulation.

Main Methods:

  • A dual-dimensional composite modulation system using chaotic code-based frequency and phase modulation based on the Logistic chaotic map.
  • Development of the Normalized Rate-Invariant Ranging (NRIR) algorithm with a resampling transformation operator.
  • Analysis using the ambiguity function, theoretical analysis, simulations, and experimental tests.

Main Results:

  • The proposed scheme effectively breaks signal periodicity and increases waveform entropy and complexity.
  • The NRIR algorithm successfully maps non-stationary signals to a normalized "constant-slope" space for coherent accumulation and ranging.
  • Demonstrated excellent performance in suppressing DRFM jamming and sweep-frequency jamming.

Conclusions:

  • The novel chaotic modulation and NRIR algorithm provide a robust solution against advanced jamming techniques for radar fuzes.
  • This research offers theoretical support and practical technical approaches for developing next-generation anti-jamming fuze systems.