An Airborne Arc Array Synthetic Aperture Radar Vibration Error Compensation Method
Compared to conventional radars, arc array synthetic aperture radar (SAR) enables wide-area observation under ideal conditions. However, helicopters carrying arc array SAR platforms are generally smaller in size and more sensitive to vibration, which has a greater impact on the imaging quality. In t...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/24/3/1013 |
| _version_ | 1797318179910844416 |
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| author | Mengxue Xiao Pingping Huang Wei Xu Weixian Tan Zhiqi Gao Yaolong Qi |
| author_facet | Mengxue Xiao Pingping Huang Wei Xu Weixian Tan Zhiqi Gao Yaolong Qi |
| author_sort | Mengxue Xiao |
| collection | DOAJ |
| description | Compared to conventional radars, arc array synthetic aperture radar (SAR) enables wide-area observation under ideal conditions. However, helicopters carrying arc array SAR platforms are generally smaller in size and more sensitive to vibration, which has a greater impact on the imaging quality. In this paper, the vibration error of the arc array SAR platform is investigated, and a vibration error model of the arc array SAR platform is established. Based on the study of the vibration error model, a vibration phase estimation and compensation algorithm based on the delayed conjugate multiplication method is proposed. In the first step, distance pulse pressure processing is performed on the echo signal. In the second step, the pulse pressure signals and their delays in the same distance unit are subjected to conjugate multiplication, and the phase of the signal after conjugate multiplication is extracted. The extracted phase is then amplitude- and phase-compensated to estimate the vibration phase. In the third step, the vibration phase is compensated in the azimuthal direction of the distance pulse pressure signal, and the pairwise echo is eliminated, which completes the compensation of the airborne arc array SAR vibration platform. |
| first_indexed | 2024-03-08T03:48:44Z |
| format | Article |
| id | doaj.art-55251d31963644bbaf9eba412be464ca |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-08T03:48:44Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-55251d31963644bbaf9eba412be464ca2024-02-09T15:22:35ZengMDPI AGSensors1424-82202024-02-01243101310.3390/s24031013An Airborne Arc Array Synthetic Aperture Radar Vibration Error Compensation MethodMengxue Xiao0Pingping Huang1Wei Xu2Weixian Tan3Zhiqi Gao4Yaolong Qi5College of Information Engineering, Inner Mongolia University of Technology, Hohhot 010080, ChinaCollege of Information Engineering, Inner Mongolia University of Technology, Hohhot 010080, ChinaCollege of Information Engineering, Inner Mongolia University of Technology, Hohhot 010080, ChinaCollege of Information Engineering, Inner Mongolia University of Technology, Hohhot 010080, ChinaCollege of Information Engineering, Inner Mongolia University of Technology, Hohhot 010080, ChinaCollege of Information Engineering, Inner Mongolia University of Technology, Hohhot 010080, ChinaCompared to conventional radars, arc array synthetic aperture radar (SAR) enables wide-area observation under ideal conditions. However, helicopters carrying arc array SAR platforms are generally smaller in size and more sensitive to vibration, which has a greater impact on the imaging quality. In this paper, the vibration error of the arc array SAR platform is investigated, and a vibration error model of the arc array SAR platform is established. Based on the study of the vibration error model, a vibration phase estimation and compensation algorithm based on the delayed conjugate multiplication method is proposed. In the first step, distance pulse pressure processing is performed on the echo signal. In the second step, the pulse pressure signals and their delays in the same distance unit are subjected to conjugate multiplication, and the phase of the signal after conjugate multiplication is extracted. The extracted phase is then amplitude- and phase-compensated to estimate the vibration phase. In the third step, the vibration phase is compensated in the azimuthal direction of the distance pulse pressure signal, and the pairwise echo is eliminated, which completes the compensation of the airborne arc array SAR vibration platform.https://www.mdpi.com/1424-8220/24/3/1013arc array synthetic aperture radarpaired echoesvibration compensation |
| spellingShingle | Mengxue Xiao Pingping Huang Wei Xu Weixian Tan Zhiqi Gao Yaolong Qi An Airborne Arc Array Synthetic Aperture Radar Vibration Error Compensation Method Sensors arc array synthetic aperture radar paired echoes vibration compensation |
| title | An Airborne Arc Array Synthetic Aperture Radar Vibration Error Compensation Method |
| title_full | An Airborne Arc Array Synthetic Aperture Radar Vibration Error Compensation Method |
| title_fullStr | An Airborne Arc Array Synthetic Aperture Radar Vibration Error Compensation Method |
| title_full_unstemmed | An Airborne Arc Array Synthetic Aperture Radar Vibration Error Compensation Method |
| title_short | An Airborne Arc Array Synthetic Aperture Radar Vibration Error Compensation Method |
| title_sort | airborne arc array synthetic aperture radar vibration error compensation method |
| topic | arc array synthetic aperture radar paired echoes vibration compensation |
| url | https://www.mdpi.com/1424-8220/24/3/1013 |
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