A novel parametric SAR autofocus method
Jia Xu - Department of Electronic Engineering, Tsinghua university,Beijing, China
Tue, 27 April 2004, 1:30 PM - 3:20 PM
In synthetic aperture radar (SAR), low scene-contrast may invalidate most of existing autofocus methods, and the limited autofocus performance is also difficult to be verified. Based on a parametric statistical signal model in the coherent processing interval (CPI) of SAR, a novel SAR autofocus method is developed and it is especially applicable to extremely low-contrast scene. Furthermore, the limitation of CPI length and the Cram?r-Rao low bound of autofocus parameter estimation are all analytically obtained. Finally, real measurement data is also exploited to validate the proposed model and the new method.
Dr. Jia Xu - Department of Electronic Engineering, Tsinghua university,Beijing, China
Jia Xu was born in Anhui Province, P.R. China, in 1974. He received the B.S. and M.S. degree from radar academy of Air Force, Wuhan, China in 1995 and 1998, and the Ph.D. degree from Navy Engineering University, Wuhan, China, in 2001. Now he is a postdoctor associated with the department of Electronics Engineering, Tsinghua University, China. His current research interests include detection and estimation theory, SAR/ISAR imaging, target recognition, array signal processing, adaptive signal processing.