Distributed ISAR Subimage Fusion of Nonuniform Rotating Target Based on Matching Fourier Transform
In real applications, the image quality of the conventional monostatic Inverse Synthetic Aperture Radar (ISAR) for the maneuvering target is subject to the strong fluctuation of Radar Cross Section (RCS), as the target aspect varies enormously. Meanwhile, the maneuvering target introduces nonuniform...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-06-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/6/1806 |
| _version_ | 1811186448102064128 |
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| author | Yuanyuan Li Yaowen Fu Wenpeng Zhang |
| author_facet | Yuanyuan Li Yaowen Fu Wenpeng Zhang |
| author_sort | Yuanyuan Li |
| collection | DOAJ |
| description | In real applications, the image quality of the conventional monostatic Inverse Synthetic Aperture Radar (ISAR) for the maneuvering target is subject to the strong fluctuation of Radar Cross Section (RCS), as the target aspect varies enormously. Meanwhile, the maneuvering target introduces nonuniform rotation after translation motion compensation which degrades the imaging performance of the conventional Fourier Transform (FT)-based method in the cross-range dimension. In this paper, a method which combines the distributed ISAR technique and the Matching Fourier Transform (MFT) is proposed to overcome these problems. Firstly, according to the characteristics of the distributed ISAR, the multiple channel echoes of the nonuniform rotation target from different observation angles can be acquired. Then, by applying the MFT to the echo of each channel, the defocused problem of nonuniform rotation target which is inevitable by using the FT-based imaging method can be avoided. Finally, after preprocessing, scaling and rotation of all subimages, the noncoherent fusion image containing all the RCS information in all channels can be obtained. The accumulation coefficients of all subimages are calculated adaptively according to the their image qualities. Simulation and experimental data are used to validate the effectiveness of the proposed approach, and fusion image with improved recognizability can be obtained. Therefore, by using the distributed ISAR technique and MFT, subimages of high-maneuvering target from different observation angles can be obtained. Meanwhile, by employing the adaptive subimage fusion method, the RCS fluctuation can be alleviated and more recognizable final image can be obtained. |
| first_indexed | 2024-04-11T13:46:35Z |
| format | Article |
| id | doaj.art-c45e3cf6183045fe99f9803b1b072bd9 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:46:35Z |
| publishDate | 2018-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c45e3cf6183045fe99f9803b1b072bd92022-12-22T04:21:05ZengMDPI AGSensors1424-82202018-06-01186180610.3390/s18061806s18061806Distributed ISAR Subimage Fusion of Nonuniform Rotating Target Based on Matching Fourier TransformYuanyuan Li0Yaowen Fu1Wenpeng Zhang2College of Electronic Science, National University of Defense Technology, Changsha 410073, ChinaCollege of Electronic Science, National University of Defense Technology, Changsha 410073, ChinaCollege of Electronic Science, National University of Defense Technology, Changsha 410073, ChinaIn real applications, the image quality of the conventional monostatic Inverse Synthetic Aperture Radar (ISAR) for the maneuvering target is subject to the strong fluctuation of Radar Cross Section (RCS), as the target aspect varies enormously. Meanwhile, the maneuvering target introduces nonuniform rotation after translation motion compensation which degrades the imaging performance of the conventional Fourier Transform (FT)-based method in the cross-range dimension. In this paper, a method which combines the distributed ISAR technique and the Matching Fourier Transform (MFT) is proposed to overcome these problems. Firstly, according to the characteristics of the distributed ISAR, the multiple channel echoes of the nonuniform rotation target from different observation angles can be acquired. Then, by applying the MFT to the echo of each channel, the defocused problem of nonuniform rotation target which is inevitable by using the FT-based imaging method can be avoided. Finally, after preprocessing, scaling and rotation of all subimages, the noncoherent fusion image containing all the RCS information in all channels can be obtained. The accumulation coefficients of all subimages are calculated adaptively according to the their image qualities. Simulation and experimental data are used to validate the effectiveness of the proposed approach, and fusion image with improved recognizability can be obtained. Therefore, by using the distributed ISAR technique and MFT, subimages of high-maneuvering target from different observation angles can be obtained. Meanwhile, by employing the adaptive subimage fusion method, the RCS fluctuation can be alleviated and more recognizable final image can be obtained.http://www.mdpi.com/1424-8220/18/6/1806distributed ISARimage fusionmatching fourier transformnonuniform rotation targetmaneuvering target |
| spellingShingle | Yuanyuan Li Yaowen Fu Wenpeng Zhang Distributed ISAR Subimage Fusion of Nonuniform Rotating Target Based on Matching Fourier Transform Sensors distributed ISAR image fusion matching fourier transform nonuniform rotation target maneuvering target |
| title | Distributed ISAR Subimage Fusion of Nonuniform Rotating Target Based on Matching Fourier Transform |
| title_full | Distributed ISAR Subimage Fusion of Nonuniform Rotating Target Based on Matching Fourier Transform |
| title_fullStr | Distributed ISAR Subimage Fusion of Nonuniform Rotating Target Based on Matching Fourier Transform |
| title_full_unstemmed | Distributed ISAR Subimage Fusion of Nonuniform Rotating Target Based on Matching Fourier Transform |
| title_short | Distributed ISAR Subimage Fusion of Nonuniform Rotating Target Based on Matching Fourier Transform |
| title_sort | distributed isar subimage fusion of nonuniform rotating target based on matching fourier transform |
| topic | distributed ISAR image fusion matching fourier transform nonuniform rotation target maneuvering target |
| url | http://www.mdpi.com/1424-8220/18/6/1806 |
| work_keys_str_mv | AT yuanyuanli distributedisarsubimagefusionofnonuniformrotatingtargetbasedonmatchingfouriertransform AT yaowenfu distributedisarsubimagefusionofnonuniformrotatingtargetbasedonmatchingfouriertransform AT wenpengzhang distributedisarsubimagefusionofnonuniformrotatingtargetbasedonmatchingfouriertransform |