TY - GEN
T1 - A hybrid Synthetic Aperture Radar autofocus approach based on FRFT and PGA
AU - Bai, Xia
AU - Wang, Dalong
AU - Zhao, Juan
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
KW - autofocus
KW - fractional Fourier transform (FRFT)
KW - phase gradient autofocus (PGA)
KW - synthetic aperture radar (SAR)
UR - http://www.scopus.com/inward/record.url?scp=84876490618&partnerID=8YFLogxK
U2 - 10.1109/ICoSP.2012.6491959
DO - 10.1109/ICoSP.2012.6491959
M3 - Conference contribution
AN - SCOPUS:84876490618
SN - 9781467321945
T3 - International Conference on Signal Processing Proceedings, ICSP
SP - 1940
EP - 1943
BT - ICSP 2012 - 2012 11th International Conference on Signal Processing, Proceedings
T2 - 2012 11th International Conference on Signal Processing, ICSP 2012
Y2 - 21 October 2012 through 25 October 2012
ER -