Title :
Improved RDM for SAR autofocus processing
Author :
Li, Gang ; Xu, Jia ; Peng, Yingning ; Xia, Xiang-Gen
Author_Institution :
Tsinghua Univ., Beijing
Abstract :
Reflectivity displacement method (RDM) is a classical algorithm of synthetic aperture radar (SAR) autofocus processing, whose performance degenerates with low contrast of the scene. This paper proposes an improved RDM for SAR auto focusing. Based on the relationship between the Doppler rate and the range, the proposed method can adoptively overcome the effect of the low contrast on the Doppler rate estimation and obtain fine autofocusing results. The experiments with real SAR data are used to show the effectivity of the proposed method.
Keywords :
Doppler radar; estimation theory; radar signal processing; synthetic aperture radar; Doppler range; Doppler rate estimation; reflectivity displacement method; synthetic aperture radar autofocus processing; Azimuth; Layout; Optimization methods; Reactive power; Reflectivity; Synthetic aperture radar; Technological innovation; Time frequency analysis;
Conference_Titel :
Synthetic Aperture Radar, 2007. APSAR 2007. 1st Asian and Pacific Conference on
Conference_Location :
Huangshan
Print_ISBN :
978-1-4244-1188-7
Electronic_ISBN :
978-1-4244-1188-7
DOI :
10.1109/APSAR.2007.4418636