Road-Aided Ground Slowly Moving Target 2D Motion Estimation for Single-Channel Synthetic Aperture Radar
Abstract
:1. Introduction
2. Signal Model of a Slowly Moving Target in SAR
3. The Proposed GMTI Method Based on Radar Vision
3.1. Road Recognition
3.2. Stationary Clutter Filtering
3.3. Moving Target Detection
3.4. Moving Target Location on the Road
3.4.1. Range Line Extraction
3.4.2. Road Width Calculation
3.4.3. Offset Direction Determination from the Road
3.4.4. Target Range Velocity Direction
3.4.5. Estimation of Target Position on the Road
3.5. Range Velocity Estimation
3.6. Road Slope Estimation
3.7. Azimuth Velocity Estimation
4. Numerical Experiments and Performance Analysis
4.1. Numerical Experiments of a Slowly Moving Target
4.2. Estimation Accuracy Discussion
4.2.1. Estimation Accuracy of Range Velocity
- Formula approximation error
- Offset position error
- Location on road error
4.2.2. Azimuth Velocity Estimation Accuracy
4.3. 2-D Motion Estimation Ability
4.3.1. Range Velocity Estimation in a Single-Channel SAR
4.3.2. Azimuth Velocity Estimation
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Target | Motion Parameters | Parameters Estimated | ||||||
---|---|---|---|---|---|---|---|---|
The Proposed Method | EBA before Filtering | EBA after Filtering | CDE before Filtering | CDE after Filtering | ||||
vy (m/s) | vx (m/s) | vy (m/s) | vx (m/s) | vy (m/s) | vy (m/s) | vy (m/s) | vy (m/s) | |
1 | 4.53 | 0.21 | 4.5443 | 0.2036 | 4.5272 | 4.5272 | 4.5317 | 4.5317 |
2 | −1.25 | −0.28 | −1.2479 | −0.2978 | −0.0250 | −1.0793 | −0.0451 | −1.1024 |
3 | 3.56 | 0.79 | 3.5629 | 0.7785 | 3.5588 | 3.5588 | 3.5615 | 3.5615 |
4 | −1.58 | −0.47 | −1.5758 | −0.4524 | −0.0051 | −1.0886 | −0.0107 | −1.0035 |
5 | −3.95 | −1.10 | −3.9573 | −1.0793 | −3.9536 | −3.9536 | −3.9472 | −3.9472 |
6 | 1.85 | −1.69 | 1.8481 | −1.7197 | 0.1260 | 1.5131 | 0.1246 | 1.4938 |
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Wang, Z.; Xu, J.; Huang, Z.; Zhang, X.; Xia, X.-G.; Long, T.; Bao, Q. Road-Aided Ground Slowly Moving Target 2D Motion Estimation for Single-Channel Synthetic Aperture Radar. Sensors 2016, 16, 383. https://doi.org/10.3390/s16030383
Wang Z, Xu J, Huang Z, Zhang X, Xia X-G, Long T, Bao Q. Road-Aided Ground Slowly Moving Target 2D Motion Estimation for Single-Channel Synthetic Aperture Radar. Sensors. 2016; 16(3):383. https://doi.org/10.3390/s16030383
Chicago/Turabian StyleWang, Zhirui, Jia Xu, Zuzhen Huang, Xudong Zhang, Xiang-Gen Xia, Teng Long, and Qian Bao. 2016. "Road-Aided Ground Slowly Moving Target 2D Motion Estimation for Single-Channel Synthetic Aperture Radar" Sensors 16, no. 3: 383. https://doi.org/10.3390/s16030383