Sparsity-driven image formation and space-variant focusing for SAR

Warning The system is temporarily closed to updates for reporting purpose.

Önhon, Özben Naime and Çetin, Müjdat (2011) Sparsity-driven image formation and space-variant focusing for SAR. In: 18th IEEE International Conference on Image Processing (ICIP 2011), Brussels, Belgium

[thumbnail of onhon_ICIP11.pdf] PDF

Download (89kB)


In synthetic aperture radar (SAR) imaging, the presence of moving targets in the scene causes phase errors in the SAR data and subsequently defocusing in the formed image. The defocusing caused by the moving targets exhibits space-variant characteristics, i.e., the defocusing arises only in the parts of the image containing the moving targets, whereas the stationary background is not defocused. Considering that the reflectivity field to be imaged usually admits sparse representation, we propose a sparsity-driven method for joint SAR imaging and removing the defocus caused by moving targets. The method is performed in a nonquadratic regular-ization based framework by solving an optimization problem, in which prior information about both the scene and phase errors are incorporated as constraints.
Item Type: Papers in Conference Proceedings
Uncontrolled Keywords: Motion errors , phase errors , regularization , space-variant focusing , sparsity , synthetic aperture radar
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering and Natural Sciences > Academic programs > Electronics
Faculty of Engineering and Natural Sciences
Depositing User: Müjdat Çetin
Date Deposited: 06 Jan 2012 10:59
Last Modified: 26 Apr 2022 09:04

Actions (login required)

View Item
View Item