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:
Aug. 29, 2000
Filed:
Aug. 24, 1998
Brian H Smith, Ann Arbor, MI (US);
Veridian ERIM International, Inc., Ann Arbor, MI (US);
Abstract
A method of minimizing leakage energy in a synthetic aperture radar (SAR) system is based a Lagrangian function constructed from image-domain magnitude, and a 'penalty function' based upon the choice of aperture. Broadly, the choice of penalty function is related to an estimate of undesirable energy lying outside of the main lobe of the impulse response introduced by the given aperture. Since there are no non-analytic constraints, the output image is purely an analytic function of the input, resulting in a more straightforward analysis and implementation while lessening the likelihood of pseudo-random phenomena. A tunable relative coefficient betveen the sidelobe energy estimate and the output magnitude allows control over a physically well-understood tradeoff between clutter contrast and point resolution. The generality of the technique may be extended to a multi-parameter minimization with possible applications in super-resolution, gap-filling, interferometry, and ultrasonic imaging, and ATR.