Synthetic aperture radar system capable of detecting moving targets
AssigneeTotalforsvarets Forskningsinstitut
InventorsMats Peterson, Hans Hellsten, Lars Ulander
Life of this patent
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Abstract
A Synthetic Aperture Radar (SAR) system and method capable of detecting moving targets which includes a platform that moves over a number of objects, such as a ground surface, and supports radar equipment which reproduces the objects by means of a fast backprojection synthetic aperture technique via at least two antennas without requirement as to directivity or fractional bandwidth. The imaging process is divided into three steps which are carried out in a determined order, the steps and the order being formation of sub-aperture beams at one speed, performing clutter suppression, and detection of moving targets.
Claims13
A method of detecting moving targets using a synthetic aperture radar (SAR) system having a platform which moves over a number of objects and supports radar equipment which reproduces the objects using a fast backprojection synthetic aperture technique via at least two antennas, said method comprising steps in the following order:
- forming sub-aperture beams over said two antennas at a speed;
- performing clutter suppression on said sub-aperture beams;
- and
- detecting moving targets using said clutter-suppressed sub-aperture beams.
A method of detecting moving targets using a synthetic aperture radar (SAR) system, comprising the steps of;
- moving radar equipment over a number of objects and reproducing the objects with a fast backprojection synthetic aperture technique, without requirement as to directivity or fractional bandwidth, using at least two antennas;
- forming, using said two antennas, sub-aperture beams at a speed;
- performing clutter suppression with GMTI filtering on said sub-aperture beams, said clutter suppression including estimation of clutter statistics of said sub-aperture beams;
- and
- detecting moving targets using said clutter-suppressed sub-aperture beams.
Dependencies are inferred from the claim text.