Rotating Parabolic-Reflector Antenna Target in SAR Data: Model, Characteristics, and Parameter Estimation
Parabolic-reflector antennas (PRAs), usually possessing rotation, are a particular type of targets of potential interest to the synthetic aperture radar (SAR) community. This paper is aimed to investigate PRA’s scattering characteristics and then to extract PRA’s parameters from SAR returns, for sup...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2013/583865 |
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| _version_ | 1850162001741873152 |
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| author | Bin Deng Hong-Qiang Wang Yu-Liang Qin Sha Zhu Xiang Li |
| author_facet | Bin Deng Hong-Qiang Wang Yu-Liang Qin Sha Zhu Xiang Li |
| author_sort | Bin Deng |
| collection | DOAJ |
| description | Parabolic-reflector antennas (PRAs), usually possessing rotation, are a particular type of targets of potential interest to the synthetic aperture radar (SAR) community. This paper is aimed to investigate PRA’s scattering characteristics and then to extract PRA’s parameters from SAR returns, for supporting image interpretation and target recognition. We at first obtain both closed-form and numeric solutions to PRA’s backscattering by geometrical optics (GO), physical optics, and graphical electromagnetic computation, respectively. Based on the GO solution, a migratory scattering center model is at first presented for representing the movement of the specular point with aspect angle, and then a hybrid model, named the migratory/micromotion scattering center (MMSC) model, is proposed for characterizing a rotating PRA in the SAR geometry, which incorporates PRA’s rotation into its migratory scattering center model. Additionally, we in detail analyze PRA’s radar characteristics on radar cross-section, high-resolution range profiles, time-frequency distribution, and 2D images, which also confirm the models proposed. A maximal likelihood estimator is developed for jointly solving the MMSC model for PRA’s multiple parameters by optimization. By exploiting the aforementioned characteristics, the coarse parameter estimation guarantees convergency upon global minima. The signatures recovered can be favorably utilized for SAR image interpretation and target recognition. |
| format | Article |
| id | doaj-art-fd3143499e0e4dc88a76824fdfd7588b |
| institution | OA Journals |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-fd3143499e0e4dc88a76824fdfd7588b2025-08-20T02:22:40ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772013-01-01201310.1155/2013/583865583865Rotating Parabolic-Reflector Antenna Target in SAR Data: Model, Characteristics, and Parameter EstimationBin Deng0Hong-Qiang Wang1Yu-Liang Qin2Sha Zhu3Xiang Li4College of Electronic Science and Engineering, National University of Defense Technology, ChinaCollege of Electronic Science and Engineering, National University of Defense Technology, ChinaCollege of Electronic Science and Engineering, National University of Defense Technology, ChinaCollege of Electronic Science and Engineering, National University of Defense Technology, ChinaCollege of Electronic Science and Engineering, National University of Defense Technology, ChinaParabolic-reflector antennas (PRAs), usually possessing rotation, are a particular type of targets of potential interest to the synthetic aperture radar (SAR) community. This paper is aimed to investigate PRA’s scattering characteristics and then to extract PRA’s parameters from SAR returns, for supporting image interpretation and target recognition. We at first obtain both closed-form and numeric solutions to PRA’s backscattering by geometrical optics (GO), physical optics, and graphical electromagnetic computation, respectively. Based on the GO solution, a migratory scattering center model is at first presented for representing the movement of the specular point with aspect angle, and then a hybrid model, named the migratory/micromotion scattering center (MMSC) model, is proposed for characterizing a rotating PRA in the SAR geometry, which incorporates PRA’s rotation into its migratory scattering center model. Additionally, we in detail analyze PRA’s radar characteristics on radar cross-section, high-resolution range profiles, time-frequency distribution, and 2D images, which also confirm the models proposed. A maximal likelihood estimator is developed for jointly solving the MMSC model for PRA’s multiple parameters by optimization. By exploiting the aforementioned characteristics, the coarse parameter estimation guarantees convergency upon global minima. The signatures recovered can be favorably utilized for SAR image interpretation and target recognition.http://dx.doi.org/10.1155/2013/583865 |
| spellingShingle | Bin Deng Hong-Qiang Wang Yu-Liang Qin Sha Zhu Xiang Li Rotating Parabolic-Reflector Antenna Target in SAR Data: Model, Characteristics, and Parameter Estimation International Journal of Antennas and Propagation |
| title | Rotating Parabolic-Reflector Antenna Target in SAR Data: Model, Characteristics, and Parameter Estimation |
| title_full | Rotating Parabolic-Reflector Antenna Target in SAR Data: Model, Characteristics, and Parameter Estimation |
| title_fullStr | Rotating Parabolic-Reflector Antenna Target in SAR Data: Model, Characteristics, and Parameter Estimation |
| title_full_unstemmed | Rotating Parabolic-Reflector Antenna Target in SAR Data: Model, Characteristics, and Parameter Estimation |
| title_short | Rotating Parabolic-Reflector Antenna Target in SAR Data: Model, Characteristics, and Parameter Estimation |
| title_sort | rotating parabolic reflector antenna target in sar data model characteristics and parameter estimation |
| url | http://dx.doi.org/10.1155/2013/583865 |
| work_keys_str_mv | AT bindeng rotatingparabolicreflectorantennatargetinsardatamodelcharacteristicsandparameterestimation AT hongqiangwang rotatingparabolicreflectorantennatargetinsardatamodelcharacteristicsandparameterestimation AT yuliangqin rotatingparabolicreflectorantennatargetinsardatamodelcharacteristicsandparameterestimation AT shazhu rotatingparabolicreflectorantennatargetinsardatamodelcharacteristicsandparameterestimation AT xiangli rotatingparabolicreflectorantennatargetinsardatamodelcharacteristicsandparameterestimation |