Abstract
In order to obtain high-resolution images, autofocus are widely used in Synthetic Aperture Radar (SAR) imaging. In this paper, a hybrid SAR autofocus approach is proposed, which estimates the quadratic phase error by using the fractional Fourier transform (FRFT) and the residual phase error by the phase gradient autofocus (PGA). The proposed approach combines the parametric and non-parametric autofocus techniques and its performance is superior to that of the PGA alone. Experimental results of simulated and real data demonstrate the validity of this hybrid approach.
Original language | English |
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Title of host publication | ICSP 2012 - 2012 11th International Conference on Signal Processing, Proceedings |
Pages | 1940-1943 |
Number of pages | 4 |
DOIs | |
Publication status | Published - 2012 |
Event | 2012 11th International Conference on Signal Processing, ICSP 2012 - Beijing, China Duration: 21 Oct 2012 → 25 Oct 2012 |
Publication series
Name | International Conference on Signal Processing Proceedings, ICSP |
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Volume | 3 |
Conference
Conference | 2012 11th International Conference on Signal Processing, ICSP 2012 |
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Country/Territory | China |
City | Beijing |
Period | 21/10/12 → 25/10/12 |
Keywords
- autofocus
- fractional Fourier transform (FRFT)
- phase gradient autofocus (PGA)
- synthetic aperture radar (SAR)
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Bai, X., Wang, D., & Zhao, J. (2012). A hybrid Synthetic Aperture Radar autofocus approach based on FRFT and PGA. In ICSP 2012 - 2012 11th International Conference on Signal Processing, Proceedings (pp. 1940-1943). Article 6491959 (International Conference on Signal Processing Proceedings, ICSP; Vol. 3). https://doi.org/10.1109/ICoSP.2012.6491959