Autofocusing the synthetic aperture radar imagery by the fast back-projection algorithm

作者：Zhang Lei^*; Li Haolin; Xing Mengdao; Bao Zheng

来源：Journal of Xidian University, 2014, 41(1): 69-74.

DOI：10.3969/j.issn.1001-2400.2014.01.013

• Auto-focus
• Back-projection
• Backprojection algorithms
• Efficient solvers
• High resolution synthetic aperture radar
• Multi aperture
• Position systems
• Synthetic Aperture Radar Imagery

Time-domain Fast Back-Projection (FBP) is an accurate and efficient solver to generate high-resolution Synthetic Aperture Radar (SAR) images. However, motion errors seriously degrade the performance of the FBP image when the accuracy of the position system does not reach the wavelength level. In this paper, we propose a novel multi-aperture map drift (MAMD) algorithm, which is implemented within the FBP iterations. The autofocus processing is realized by estimating the shift of sub-aperture images and it keeps the high accuracy of the FBP algorithm. Experiments by using real airborne SAR data validate the effectiveness of the proposed algorithm.

• 出版日期2014
• 单位西安电子科技大学