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A hybrid SAR autofocus algorithm based FRFT and PGA
WANG Dalong,BAI Xia * #
Information and Electronics School,Beijing Institute of Technology,Beijing 100081
*Correspondence author
#Submitted by
Subject:
Funding: Research Fund for the Doctoral Program of Higher Education of China（No.Grant no.20091101120027）, National Key Basic Research Program founded by MOST（No.Grant no.2009CB724003）
Opened online: 8 February 2012
Accepted by: none
Citation: WANG Dalong,BAI Xia.A hybrid SAR autofocus algorithm based FRFT and PGA[OL]. [ 8 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4462213
 
 
In order to obtain high-resolution images, autofocus algorithms are widely used in SAR imaging. In the paper, a hybrid SAR autofocus algorithm is proposed. The proposed method estimates the quadratic phase error by FRFT method and the residual phase error by PGA. Results from simulated and real data prove that performance of the proposed algorithm is superior to the individual PGA.
Keywords:synthetic aperture radar (SAR); autofocus; phase gradient autofocus (PGA); fractional Fourier transform (FRFT)
 
 
 

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