Reduced rank interference suppression for multichannel SAR
Date
2006
Authors
Rosenberg, L.
Gray, D.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Conference paper
Citation
Proceedings of the Sixth European Conference on Synthetic Aperture Radar, 16-18 May, 2006, International Congress Centre, Dresdan, Germany [CDROM]
Statement of Responsibility
Luke Rosenberg, Doug Gray
Conference Name
European Conference on Synthetic Aperture Radar (6th : 2006 : Dresden, Germany)
Abstract
Large regions of a Synthetic Aperture Radar (SAR) image can potentially be destroyed by an airborne broadband jammer. Jammer components include both the direct-path and multipath reflections from the ground, known as hot-clutter (HC) or terrain scattered interference. Using multiple antennas on a SAR provides spatial degrees of freedom and allows for beamforming to reject the direct-path signal. Previous studies have shown that derivative constraints when combined with fast-time taps can suppress HC while maintaining a reasonable SAR image. This approach however requires an expensive matrix inverse and may not be implementable in real time. This paper therefore presents a fast-time Space Time Adaptive Processing (STAP) algorithm with a reduced rank constrained Generalised Sidelobe Canceller (GSC).