Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar
Reexamination Certificate
2006-09-12
2006-09-12
Gregory, Bernarr E. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Synthetic aperture radar
C342S02500R, C342S02500R, C342S02500R, C342S089000, C342S175000, C342S176000, C342S179000, C342S195000, C342S196000
Reexamination Certificate
active
07106243
ABSTRACT:
A radar receiver on a moving platform images a moving target and non-moving clutter using a single SAR array. The radar receiver converts the radar returns into digital radar returns and motion compensates the digital radar returns with respect to a reference, then applies further phase compensation to obtain an autofocused synthetic aperture image. A plurality of moving target pixels descriptive of the moving target are detected within the autofocused synthetic aperture image. The plurality of moving target pixels are transformed from the autofocused image to the time domain. The time domain moving target data is focused by iteratively applying a phase compensation to the time domain moving target data.
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“Signal Based Motion Compensation for Synthetic Aperture Radar”; DOE Report TSC-B022-I99-0024; DOE Grant No. DE-FG03-96ER82294; Technology Service Corp.; Los Angeles, California; Jun. 7, 1999.
J.R. Fienup, “Synthetic-aperture Radar Autofocus by Maximizing Sharpness”; Optics Letters; vol. 25, No. 4; Feb. 15, 2000; pp. 221-223.
Krikorian Kapriel V.
Rosen Robert A.
Alkov Leonard A.
Gregory Bernarr E.
Gunther John E.
Raytheon Company
Vick Karl A.
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