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| Citation: | YUAN Hang, HE Qifang, LUO Ying, et al. Three-dimensional micro-motion parameters extraction of translational rotating targets based on vortex electromagnetic wave radar[J]. Journal of Radars, 2023, 12(4): 804–816. doi: 10.12000/JR23065
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Three-dimensional Micro-motion Parameters Extraction of Translational Rotating Targets Based on Vortex Electromagnetic Wave Radar
doi: 10.12000/JR23065
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Abstract
Compared with traditional Electromagnetic (EM) wave radars, vortex EM wave radars can simultaneously observe the micro-motion components projected onto the radar’s radial and perpendicular planes, providing more information for target recognition. The current research on the micro-Doppler effect of vortex EM wave radar is still in its infancy, and the extraction of three-dimensional micro-motion parameters of rotating targets has been preliminarily achieved. However, the impact of target translation was not considered. Therefore, the micro-Doppler effect of translational rotating targets in vortex EM wave radar is studied in this paper. The angular Doppler properties of translational rotating targets are derived, and a three-dimensional micro-motion parameter extraction method based on the 1/4 micro-motion period Doppler frequency shift curve is proposed. Estimation of parameters such as target rotation frequency, rotation radius, rotation vector and translational velocity vector is achieved. The correctness of angular Doppler properties and the effectiveness of parameter extraction method are verified by simulations. -
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References
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- Figure 1. Observation model of translational rotating targets
- Figure 2. The three-dimensional rotation result
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Figure 3. The trajectory of the point q on plane
${XOY}$ - Figure 4. Angular Doppler frequency shift curve
- Figure 5. Angle Doppler curve in most cases
- Figure 6. Angle Doppler curve in four cases
- Figure 7. Algorithm flow chart
- Figure 8. The curve of Doppler
- Figure 9. Pitch angle and Bessel function value change curve
- Figure 10. Echo time-frequency map (linear Doppler+ angular Doppler)
- Figure 11. Angular Doppler curves under different micro motion parameter multiples
- Figure 12. Linear Doppler curve under different order derivatives
- Figure 13. Doppler frequency shift curve at quarter cycle
- Figure 14. Angular Doppler curve after adding error