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| Content Provider | IET Digital Library |
|---|---|
| Author | Su, Hao Wei, Shunjun Zhang, Xiaoling Pu, Limin Yang, Xiaoliang |
| Abstract | Small multi-rotor unmanned aerial vehicles (SMR-UAVs) are a promising platform for low-cost synthetic aperture radar (SAR) systems. However, SMR-UAVs usually suffer from serious position errors due to their unstable motion and low actuary position sensors, and autofocus is an indispensable step for their high-quality imaging. An efficient back-projection autofocus method is proposed for SMR-UAV SAR systems by the principle of minimum entropy. The position error estimation model via minimum entropy is derived. The conjugate-gradient method is used to efficiently estimate the position errors. Moreover, to improve the computing efficiency, the strong scatterer areas are estimated as the input of entropy estimation. The effectiveness of the algorithm is demonstrated using both simulation and experimental data. |
| Starting Page | 7356 |
| Ending Page | 7359 |
| Page Count | 4 |
| Volume Number | 2019 |
| e-ISSN | 20513305 |
| Issue Number | Issue 21, Nov (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2019/21 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2019.0625 |
| Journal | The Journal of Engineering |
| Publisher | The Institution of Engineering and Technology |
| Publisher Date | 2019-07-11 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/) |
| Subject Keyword | Aerospace Control Autonomous Aerial Vehicle Computer Vision And Image Processing Technique Computing Efficiency Conjugate-gradient Method Efficient Back-projection Autofocus Method Entropy Entropy Estimation Gradient Method High-quality Imaging Interpolation And Function Approximation Low Actuary Position Sonsor Low-cost Synthetic Aperture Radar System Minimum Entropy BP Algorithm Minimum Entropy Principle Mobile Robots Multirotor Unmanned Aerial Vehicle Numerical Analysis Optical, Image And Video Signal Processing Position Error Estimation Model Radar Equipment Radar Imaging Robot Vision Scatterer Areas Small Multirotor UAV SAR SMR-UAV SAR System Synthetic Aperture Radar System And Application Unstable Motion |
| Content Type | Text |
| Resource Type | Article |
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