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Reconstruction of Range-Doppler Map Corrupted by FMCW Radar Asynchronization
Kyung-Min Lee1, In-Seong Lee2, Hee-Sub Shin3
1Department of Electrical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang 37673, Republic of Korea.
Sensors (Basel, Switzerland)
|July 8, 2023
Summary
This study introduces a new method to fix corrupted Range-Doppler maps in Frequency-modulated continuous wave (FMCW) radar systems caused by clock signal asynchronization. The technique successfully reconstructs data, ensuring accurate target detection.
Area of Science:
- Radar Systems Engineering
- Signal Processing
- Automotive Sensing
Background:
- Frequency-modulated continuous wave (FMCW) radar systems rely on precise synchronization between transmitter and receiver clock signals.
- Asynchronization issues can lead to corrupted Range-Doppler (R-D) maps, hindering accurate target detection and tracking.
- Existing methods may struggle with the dynamic nature of asynchronization errors in real-world scenarios.
Purpose of the Study:
- To develop and validate a novel signal processing method for reconstructing corrupted R-D maps in FMCW radar systems.
- To address the challenge of R-D map corruption caused by clock signal asynchronization.
- To improve the reliability of FMCW radar systems for target detection applications.
Main Methods:
- A signal processing approach is proposed to reconstruct R-D maps corrupted by FMCW radar asynchronization.
- Image entropy is calculated for each R-D map to identify corrupted instances.
- Corrupted R-D maps are reconstructed using valid R-D maps acquired immediately before and after the corrupted ones.
Main Results:
- The proposed method effectively extracts and reconstructs corrupted R-D maps.
- Experimental validation with human and bike-rider targets in indoor and outdoor environments demonstrated successful reconstruction.
- Comparison with ground-truth data confirmed the accuracy of the reconstructed range and speed information.
Conclusions:
- The developed signal processing method offers a robust solution for R-D map reconstruction in FMCW radar systems experiencing asynchronization.
- The technique enhances the reliability of target detection by mitigating the impact of clock signal errors.
- This work contributes to the advancement of dependable radar sensing technologies.
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