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:
Jul. 12, 2011
Filed:
May. 01, 2009
Clark E. Cohen, Washington, DC (US);
Todd E. Humphreys, Half Moon Bay, CA (US);
Brent M. Ledvina, San Francisco, CA (US);
William J. Bencze, Half Moon Bay, CA (US);
Mark L. Psiaki, Brooktondale, NY (US);
Bryan T. Galusha, Oakland, CA (US);
Clark E. Cohen, Washington, DC (US);
Todd E. Humphreys, Half Moon Bay, CA (US);
Brent M. Ledvina, San Francisco, CA (US);
William J. Bencze, Half Moon Bay, CA (US);
Mark L. Psiaki, Brooktondale, NY (US);
Bryan T. Galusha, Oakland, CA (US);
Coherent Navigation, Inc., San Mateo, CA (US);
Abstract
A practical method for adding new high-performance, tightly integrated Nav-Com capability to any Global Navigation Satellite System (GNSS) user equipment requires no hardware modifications to the existing user equipment. In one example, the iGPS concept is applied to a Defense Advanced GPS Receiver (DAGR) and combines Low Earth Orbiting (LEO) satellites, such as Iridium, with GPS or other GNSS systems to significantly improve the accuracy, integrity, and availability of Position, Navigation, and Timing (PNT) and to enable new communication enhancements made available by the synthesis of precisely coupled navigation and communication modes. To achieve time synchronization stability between the existing DAGR and a plug-in iGPS enhancement module, a special-purpose wideband reference signal is generated by the iGPS module and coupled to the DAGR via the existing antenna port.