快速后向投影合成孔径雷达成像的自聚焦方法

doi:10.3969/j.issn.1001-2400.2014.01.013

Abstract

Abstract:

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.

Key words: synthetic aperture radar(SAR), back-projection, fast back-projection, autofocus, motion compensation

ZHANG Lei;LI Haolin;XING Mengdao;BAO Zheng. Autofocusing the synthetic aperture radar imagery by the fast back-projection algorithm[J].J4, 2014, 41(1): 69-74.

References

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

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