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Multiband complementary dual-chirp waveform for the simultaneous range and velocity detection
Applied Optics
|September 22, 2025
Summary
This study introduces a photonic radar using V-shaped chirps for accurate range and velocity detection. The method simplifies processing, enabling high-precision measurements for moving targets and radar imaging.
Area of Science:
- Photonics
- Radar Systems
- Signal Processing
Background:
- Traditional radar systems often require complex signal processing and high-speed hardware.
- Accurate simultaneous range and velocity detection remains a challenge in certain applications.
Purpose of the Study:
- To develop a photonic frequency-modulated continuous wave (FMCW) radar system.
- To achieve high-accuracy simultaneous range and velocity detection using novel chirp waveforms.
- To simplify radar signal processing requirements.
Main Methods:
- Utilized multiband complementary V-shaped chirps for FMCW radar.
- Employed a dual-polarization dual-parallel Mach-Zehnder modulator for waveform generation.
- Demonstrated inverse synthetic aperture radar (ISAR) imaging with a down-chirp linear frequency-modulated signal.
Main Results:
- Achieved range accuracy of 50 cm and velocity accuracy of 0.7 m/s for a target at 100 m moving at 60 m/s.
- Estimated toy car velocity with 0.3 m/s accuracy.
- Obtained high-resolution ISAR imaging with range and cross-range errors below 4 cm.
Conclusions:
- The proposed photonic radar approach enables accurate simultaneous range and velocity detection with reduced processing complexity.
- The V-shaped chirp technique is effective for high-precision radar measurements and imaging.
- Experimental validation confirms the system's performance and potential for advanced radar applications.
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