Journal
IET RADAR SONAR AND NAVIGATION
Volume 14, Issue 1, Pages 2-9Publisher
WILEY
DOI: 10.1049/iet-rsn.2019.0124
Keywords
Doppler effect; Doppler radar; object detection; angular momentum; image recognition; microDoppler effect; vortex-electromagnetic-wave-based radar; orbital angular momentum; vortex EM waves; linear Doppler shift; angular Doppler shift; vortex-EM-wave-based radar; nonvortex-EM-wave-based radar; moving target detection; m-D effect; target identification; target recognition
Funding
- National Natural Science Foundation of China [61971434, 61801516]
- Natural Science Foundation Research Program of Shaanxi Province [2018JM6072, 2019JQ-238]
- Innovation Group Science Foundation of Engineering University of PAP
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The vortex electromagnetic (EM) wave carrying orbital angular momentum (OAM) has attracted much attention in radar applications. Aimed at the moving target detection application of vortex EM waves, the Doppler effect and the micro-Doppler (m-D) effect, both including the linear Doppler shift and the angular Doppler shift, are investigated. The theoretical analyses demonstrate that the Doppler effect and the m-D effect in vortex-EM-wave-based radar are significantly more complicated than those in traditional non-vortex-EM-wave-based radar, and can provide additional features for target identification and recognition. Simulations are given to validate the proposed theoretical analyses.
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