A Novel Bistatic SAR Maritime Ship Target Imaging Algorithm Based on Cubic Phase Time-Scaled Transformation
Due to the advantages of flexible configuration, bistatic synthetic aperture radar (BiSAR) has the ability to effectively observe from various visual angles, such as forward view area and squint area, and has good anti-jamming characteristics. It can be applied to the surveillance of ship targets on...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/5/1330 |
| _version_ | 1797614455065935872 |
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| author | Qing Yang Zhongyu Li Junao Li Hongyang An Junjie Wu Yiming Pi Jianyu Yang |
| author_facet | Qing Yang Zhongyu Li Junao Li Hongyang An Junjie Wu Yiming Pi Jianyu Yang |
| author_sort | Qing Yang |
| collection | DOAJ |
| description | Due to the advantages of flexible configuration, bistatic synthetic aperture radar (BiSAR) has the ability to effectively observe from various visual angles, such as forward view area and squint area, and has good anti-jamming characteristics. It can be applied to the surveillance of ship targets on the sea and is gradually gaining an increasing amount of attention. However, for ship targets with complex motions on the sea surface, such as maneuvering targets or ship targets under high sea conditions, the high-order Doppler frequency of the scattering points is always spatial variation (related to the spatial position of scattering points), which poses a considerable challenge for the imaging of maritime ship targets in BiSAR. To resolve this problem, a BiSAR maritime ship target imaging algorithm based on cubic phase time-scaled transformation is proposed in this paper. First, through pre-processing of echo such as Doppler prefiltering and keystone transform, the translation compensation of the BiSAR maritime ship target is completed, and the scattering point energy is corrected to within one range unit. Then, the azimuth signal is modeled as a multi-component cubic phase signal. Based on the proposed cubic phase time-scaled transformation, the Doppler centroid, frequency rate, and third-order frequency of scattering points are estimated. Eventually, the BiSAR imaging of maritime ship targets is realized. This algorithm has excellent noise immunity and low cross-terms. The simulation leads to the verification of the validity of the proposed algorithm. |
| first_indexed | 2024-03-11T07:12:25Z |
| format | Article |
| id | doaj.art-90e38b55138d40859a1181101b6808d8 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T07:12:25Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-90e38b55138d40859a1181101b6808d82023-11-17T08:31:37ZengMDPI AGRemote Sensing2072-42922023-02-01155133010.3390/rs15051330A Novel Bistatic SAR Maritime Ship Target Imaging Algorithm Based on Cubic Phase Time-Scaled TransformationQing Yang0Zhongyu Li1Junao Li2Hongyang An3Junjie Wu4Yiming Pi5Jianyu Yang6School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaDue to the advantages of flexible configuration, bistatic synthetic aperture radar (BiSAR) has the ability to effectively observe from various visual angles, such as forward view area and squint area, and has good anti-jamming characteristics. It can be applied to the surveillance of ship targets on the sea and is gradually gaining an increasing amount of attention. However, for ship targets with complex motions on the sea surface, such as maneuvering targets or ship targets under high sea conditions, the high-order Doppler frequency of the scattering points is always spatial variation (related to the spatial position of scattering points), which poses a considerable challenge for the imaging of maritime ship targets in BiSAR. To resolve this problem, a BiSAR maritime ship target imaging algorithm based on cubic phase time-scaled transformation is proposed in this paper. First, through pre-processing of echo such as Doppler prefiltering and keystone transform, the translation compensation of the BiSAR maritime ship target is completed, and the scattering point energy is corrected to within one range unit. Then, the azimuth signal is modeled as a multi-component cubic phase signal. Based on the proposed cubic phase time-scaled transformation, the Doppler centroid, frequency rate, and third-order frequency of scattering points are estimated. Eventually, the BiSAR imaging of maritime ship targets is realized. This algorithm has excellent noise immunity and low cross-terms. The simulation leads to the verification of the validity of the proposed algorithm.https://www.mdpi.com/2072-4292/15/5/1330bistatic synthetic aperture radar (BiSAR)cubic phase signalrange-instantaneous-Dopplercubic phase time-scaled transformation |
| spellingShingle | Qing Yang Zhongyu Li Junao Li Hongyang An Junjie Wu Yiming Pi Jianyu Yang A Novel Bistatic SAR Maritime Ship Target Imaging Algorithm Based on Cubic Phase Time-Scaled Transformation Remote Sensing bistatic synthetic aperture radar (BiSAR) cubic phase signal range-instantaneous-Doppler cubic phase time-scaled transformation |
| title | A Novel Bistatic SAR Maritime Ship Target Imaging Algorithm Based on Cubic Phase Time-Scaled Transformation |
| title_full | A Novel Bistatic SAR Maritime Ship Target Imaging Algorithm Based on Cubic Phase Time-Scaled Transformation |
| title_fullStr | A Novel Bistatic SAR Maritime Ship Target Imaging Algorithm Based on Cubic Phase Time-Scaled Transformation |
| title_full_unstemmed | A Novel Bistatic SAR Maritime Ship Target Imaging Algorithm Based on Cubic Phase Time-Scaled Transformation |
| title_short | A Novel Bistatic SAR Maritime Ship Target Imaging Algorithm Based on Cubic Phase Time-Scaled Transformation |
| title_sort | novel bistatic sar maritime ship target imaging algorithm based on cubic phase time scaled transformation |
| topic | bistatic synthetic aperture radar (BiSAR) cubic phase signal range-instantaneous-Doppler cubic phase time-scaled transformation |
| url | https://www.mdpi.com/2072-4292/15/5/1330 |
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