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US 6,608,586 B1Granted
Method for removing RFI from SAR images
AssigneeSandia Corporation
InventorArmin W. Doerry
Life of this patent
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Abstract
A method of removing RFI from a SAR by comparing two SAR images on a pixel by pixel basis and selecting the pixel with the lower magnitude to form a composite image. One SAR image is the conventional image produced by the SAR. The other image is created from phase-history data which has been filtered to have the frequency bands containing the RFI removed.
Claims11
A method for removing radio frequency interference (RFI) from a digital synthetic aperture radar (SAR) imaging signal comprising:
- forming a first digital image from a SAR phase-history data set that includes RFI;
- forming a second digital image after a frequency band containing the RFI has been removed from a SAR phase history data set;
- comparing the images on a pixel by pixel basis;
- and
- forming a composite SAR digital image from the compared pixels having the lower magnitude.
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Dependencies are inferred from the claim text.