Title :
Two-dimensional autofocus technique for stepped-frequency ISAR imaging
Author :
Jeong, H.-R. ; Kim, K.-T. ; Kim, H.-T. ; Park, S.-H.
Author_Institution :
POSTECH, Pohang
Abstract :
A new ISAR autofocus method based on the subarray averaging concept is developed to compensate for the phase errors along down-range dimension. The results in this paper show that the ISAR autofocus based on the subarray averaging concept makes it possible to reconstruct high quality ISAR images even though a target moves with very high speed, and a stepped-frequency signal with low PRF is used.
Keywords :
entropy; image reconstruction; radar imaging; synthetic aperture radar; 2D autofocus method; entropy minimisation; image reconstruction; stepped-frequency ISAR imaging; subarray averaging; Acceleration; Amplitude estimation; Cost function; Entropy; Frequency estimation; Least squares approximation; Light scattering; Motion estimation; Parameter estimation; Radar scattering;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0877-1
Electronic_ISBN :
978-1-4244-0878-8
DOI :
10.1109/APS.2007.4395787
