A General Numerical Error Compensation Method for NLFM Signal in SAR System Based on Non-Start–Stop Model
Nonlinear frequency modulated (NLFM) signals can be used to enhance the resolution, anti-jamming capability, and imaging quality of synthetic aperture radar (SAR) systems through optimized design, demonstrating substantial application potential. However, in a SAR system using NLFM signals, the non-s...
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MDPI AG
2025-04-01
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| Online Access: | https://www.mdpi.com/1424-8220/25/9/2770 |
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| author | Gui Wang Heng Zhang Bo Li Weidong Yu |
| author_facet | Gui Wang Heng Zhang Bo Li Weidong Yu |
| author_sort | Gui Wang |
| collection | DOAJ |
| description | Nonlinear frequency modulated (NLFM) signals can be used to enhance the resolution, anti-jamming capability, and imaging quality of synthetic aperture radar (SAR) systems through optimized design, demonstrating substantial application potential. However, in a SAR system using NLFM signals, the non-start–stop effect, caused by the continuous motion of the platform during pulse transmission and reception, introduces significant errors, resulting in target defocusing. To tackle this problem, this paper proposes a general numerical error compensation method dedicated to NLFM signals. First, the error model is correspondingly derived from the non-start–stop assumption. Then, a phase compensation method is designed through numerical calculations. Simulation experiments are performed to validate the effectiveness of the proposed method. This method provides a robust error compensation framework for high-resolution SAR systems using NLFM signals. |
| format | Article |
| id | doaj-art-da39b4598fed42a6a556c1168b41c29d |
| institution | OA Journals |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-da39b4598fed42a6a556c1168b41c29d2025-08-20T02:31:11ZengMDPI AGSensors1424-82202025-04-01259277010.3390/s25092770A General Numerical Error Compensation Method for NLFM Signal in SAR System Based on Non-Start–Stop ModelGui Wang0Heng Zhang1Bo Li2Weidong Yu3Department of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaDepartment of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaDepartment of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaDepartment of Space Microwave Remote Sensing System, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, ChinaNonlinear frequency modulated (NLFM) signals can be used to enhance the resolution, anti-jamming capability, and imaging quality of synthetic aperture radar (SAR) systems through optimized design, demonstrating substantial application potential. However, in a SAR system using NLFM signals, the non-start–stop effect, caused by the continuous motion of the platform during pulse transmission and reception, introduces significant errors, resulting in target defocusing. To tackle this problem, this paper proposes a general numerical error compensation method dedicated to NLFM signals. First, the error model is correspondingly derived from the non-start–stop assumption. Then, a phase compensation method is designed through numerical calculations. Simulation experiments are performed to validate the effectiveness of the proposed method. This method provides a robust error compensation framework for high-resolution SAR systems using NLFM signals.https://www.mdpi.com/1424-8220/25/9/2770synthetic aperture radarnonlinear frequency modulated signalnon-start–stop modelnumerical error compensationimaging processing |
| spellingShingle | Gui Wang Heng Zhang Bo Li Weidong Yu A General Numerical Error Compensation Method for NLFM Signal in SAR System Based on Non-Start–Stop Model Sensors synthetic aperture radar nonlinear frequency modulated signal non-start–stop model numerical error compensation imaging processing |
| title | A General Numerical Error Compensation Method for NLFM Signal in SAR System Based on Non-Start–Stop Model |
| title_full | A General Numerical Error Compensation Method for NLFM Signal in SAR System Based on Non-Start–Stop Model |
| title_fullStr | A General Numerical Error Compensation Method for NLFM Signal in SAR System Based on Non-Start–Stop Model |
| title_full_unstemmed | A General Numerical Error Compensation Method for NLFM Signal in SAR System Based on Non-Start–Stop Model |
| title_short | A General Numerical Error Compensation Method for NLFM Signal in SAR System Based on Non-Start–Stop Model |
| title_sort | general numerical error compensation method for nlfm signal in sar system based on non start stop model |
| topic | synthetic aperture radar nonlinear frequency modulated signal non-start–stop model numerical error compensation imaging processing |
| url | https://www.mdpi.com/1424-8220/25/9/2770 |
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