Ground-Based SAR Moving Target Refocusing Based on Relative Speed for Monitoring Mine Slopes
Ground-based synthetic aperture radar (GBSAR) has the advantage of retrieving submillimeter deformation of the mine slope by using the differential interferometry technique, which is important for safe production in mining applications. However, the moving vehicle’s defocus/displaced signal will mas...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/17/4243 |
| _version_ | 1797493367680008192 |
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| author | Wenjie Shen Shuo Wang Yun Lin Yang Li Fan Ding Yanping Wang |
| author_facet | Wenjie Shen Shuo Wang Yun Lin Yang Li Fan Ding Yanping Wang |
| author_sort | Wenjie Shen |
| collection | DOAJ |
| description | Ground-based synthetic aperture radar (GBSAR) has the advantage of retrieving submillimeter deformation of the mine slope by using the differential interferometry technique, which is important for safe production in mining applications. However, the moving vehicle’s defocus/displaced signal will mask the SAR image of the mining area which affects the accuracy of interference phase extraction and deformation inversion. In order to remove its influence, the moving target can first be refocused and then removed. To our knowledge, there is no GBSAR moving target refocusing method currently. Hence, the refocusing method is necessary. To solve the above problem, this paper proposes a single-channel FMCW-GBSAR moving target refocusing method based on relative speed. Firstly, the FMCW-GBSAR moving target signal model is analyzed, and then the relative speed based signal model is deduced. Based on the model and GBSAR’s feature of incomplete synthetic aperture, the Range Doppler (RD) algorithm is adopted and improved to achieve refocusing using relative speed parameters. The algorithm is controlled by relative speed and squint angle; thus, the refocused target image can be obtained via searching 2D parameters. The proposed method is verified by the synthetic data, which are generated by combining NCUT FMCW GBSAR real data and simulated moving target echo. |
| first_indexed | 2024-03-10T01:19:01Z |
| format | Article |
| id | doaj.art-7162c1e8f36747d0b9b6f0a0d84e915d |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T01:19:01Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-7162c1e8f36747d0b9b6f0a0d84e915d2023-11-23T14:03:21ZengMDPI AGRemote Sensing2072-42922022-08-011417424310.3390/rs14174243Ground-Based SAR Moving Target Refocusing Based on Relative Speed for Monitoring Mine SlopesWenjie Shen0Shuo Wang1Yun Lin2Yang Li3Fan Ding4Yanping Wang5Radar Monitoring Technology Laboratory, School of Information Science and Technology, North China University of Technology, Beijing 100144, ChinaRadar Monitoring Technology Laboratory, School of Information Science and Technology, North China University of Technology, Beijing 100144, ChinaRadar Monitoring Technology Laboratory, School of Information Science and Technology, North China University of Technology, Beijing 100144, ChinaRadar Monitoring Technology Laboratory, School of Information Science and Technology, North China University of Technology, Beijing 100144, ChinaRadar Monitoring Technology Laboratory, School of Information Science and Technology, North China University of Technology, Beijing 100144, ChinaRadar Monitoring Technology Laboratory, School of Information Science and Technology, North China University of Technology, Beijing 100144, ChinaGround-based synthetic aperture radar (GBSAR) has the advantage of retrieving submillimeter deformation of the mine slope by using the differential interferometry technique, which is important for safe production in mining applications. However, the moving vehicle’s defocus/displaced signal will mask the SAR image of the mining area which affects the accuracy of interference phase extraction and deformation inversion. In order to remove its influence, the moving target can first be refocused and then removed. To our knowledge, there is no GBSAR moving target refocusing method currently. Hence, the refocusing method is necessary. To solve the above problem, this paper proposes a single-channel FMCW-GBSAR moving target refocusing method based on relative speed. Firstly, the FMCW-GBSAR moving target signal model is analyzed, and then the relative speed based signal model is deduced. Based on the model and GBSAR’s feature of incomplete synthetic aperture, the Range Doppler (RD) algorithm is adopted and improved to achieve refocusing using relative speed parameters. The algorithm is controlled by relative speed and squint angle; thus, the refocused target image can be obtained via searching 2D parameters. The proposed method is verified by the synthetic data, which are generated by combining NCUT FMCW GBSAR real data and simulated moving target echo.https://www.mdpi.com/2072-4292/14/17/4243ground-based synthetic aperture radarrelative speedmoving target refocusingrange doppler algorithm |
| spellingShingle | Wenjie Shen Shuo Wang Yun Lin Yang Li Fan Ding Yanping Wang Ground-Based SAR Moving Target Refocusing Based on Relative Speed for Monitoring Mine Slopes Remote Sensing ground-based synthetic aperture radar relative speed moving target refocusing range doppler algorithm |
| title | Ground-Based SAR Moving Target Refocusing Based on Relative Speed for Monitoring Mine Slopes |
| title_full | Ground-Based SAR Moving Target Refocusing Based on Relative Speed for Monitoring Mine Slopes |
| title_fullStr | Ground-Based SAR Moving Target Refocusing Based on Relative Speed for Monitoring Mine Slopes |
| title_full_unstemmed | Ground-Based SAR Moving Target Refocusing Based on Relative Speed for Monitoring Mine Slopes |
| title_short | Ground-Based SAR Moving Target Refocusing Based on Relative Speed for Monitoring Mine Slopes |
| title_sort | ground based sar moving target refocusing based on relative speed for monitoring mine slopes |
| topic | ground-based synthetic aperture radar relative speed moving target refocusing range doppler algorithm |
| url | https://www.mdpi.com/2072-4292/14/17/4243 |
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