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:
Feb. 04, 2003
Filed:
Nov. 25, 1998
Applicant:
Inventors:
Stephanie Demers, Rockville, MD (US);
Michael Parr, Hermosa Beach, CA (US);
Anthony Noerpel, Lovettsville, VA (US);
Dave Roos, Boyds, MD (US);
Assignee:
Hughes Electronics Corporation, El Segundo, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 7/185 ; G01S 5/02 ;
U.S. Cl.
CPC ...
H04B 7/185 ; G01S 5/02 ;
Abstract
A system ( ) and method ( ) for estimating the location of a terrestrial-based user terminal ( ) is provided. The user terminal ( ) is capable of measuring the relative signal strengths of a plurality of spot beams pilot signal emitted from a geostationary satellite ( ). The user terminal ( ) then estimates its position based on the measured relative signal strengths. Using this approach, the user terminal ( ) can quickly determine its location without prior knowledge of its position or delay time.