The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2009
Filed:
Mar. 20, 2008
Theagenis J. Abatzoglou, Huntington Beach, CA (US);
Leo H. Hui, Alhambra, CA (US);
Theagenis J. Abatzoglou, Huntington Beach, CA (US);
Leo H. Hui, Alhambra, CA (US);
Raytheon Company, Waltham, MA (US);
Abstract
A moving radar generates a search mode synthetic aperture image of a patch having a principal scatterer. The boundaries of the patch are from Rto Rslant range and θto θazimuth angle. A computer motion compensates digital samples to obtain a motion compensated digital array. The motion compensated digital array is converted to a frequency array in the frequency domain K, KThe frequency array has a rectangular aperture extending ΔKand ΔK. Available samples from the frequency array are computed using a Range Migration Algorithm including a Stolt interpolation. Usable samples are identified from the available samples using one or more criteria. Usable samples are removed from available samples to obtain incomplete samples. Features related to the patch having a principal scatterer are extracted from the usable samples. The features are used to extrapolate extrapolated samples from the usable samples. The extrapolated samples, the usable samples and the incomplete samples are combined to compute the image of the patch and principal scatterer. Incomplete samples are substituted where they overlap interpolated samples.