Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2008-05-13
2008-05-13
Phan, Dao (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C342S357490, C342S357490, C701S213000
Reexamination Certificate
active
11268317
ABSTRACT:
A navigation system provides a significant level of protection against all forms of interference or jamming to GPS in a cost-effective way. The system employs a network of ground reference stations and Low Earth Orbiting (LEO) satellites in conjunction with GPS. A common-view ranging geometry to a GPS satellite is established that links a reference station and a user. A second common-view geometry to a LEO satellite between the same reference station and user pair is also established. The ground stations synthesize real-time aiding signals by making carrier phase measurements of GPS the LEO satellite signals. This aiding information is transmitted via the LEO satellites to the user receiver at high power to penetrate ambient jamming. The user receiver locks onto the carrier phase of the LEO satellite, demodulates the aiding information, then applies the carrier phase measurements and the aiding information to enable extended coherent measurements of the GPS signals. The system thereby recovers the GPS signals that would otherwise be lost to the jamming.
REFERENCES:
patent: 5398034 (1995-03-01), Spilker, Jr.
patent: 5500648 (1996-03-01), Maine et al.
patent: 5732387 (1998-03-01), Armbruster et al.
patent: 5812961 (1998-09-01), Enge et al.
patent: 5944770 (1999-08-01), Enge et al.
patent: 5983160 (1999-11-01), Horslund et al.
patent: 6313789 (2001-11-01), Zhodzishsky et al.
patent: 6373432 (2002-04-01), Rabinowitz et al.
patent: 6570534 (2003-05-01), Cohen et al.
patent: 6762714 (2004-07-01), Cohen et al.
patent: 2002/0193108 (2002-12-01), Robinett
patent: 2005/0004758 (2005-01-01), Whelan et al.
patent: 2005/0114892 (2005-05-01), Chan
patent: 2005/0156782 (2005-07-01), Whelan et al.
patent: 2005/0159891 (2005-07-01), Cohen et al.
Mark L. Psiaki et al, Design and Practical Implementation of Multi-Frequency RF Front Ends Using Direct RF Sampling, ION GPS/GNSS 2003, pp. 1-13.
William I. Bertiger et al, A Prototype Real-Time Wide Area Differential GPS System, Navigations, vol. IV, 1999.
I. Y. Bar-Itzhack et al, Control Theoretic Approach to Intertial Navigation Systems, Department of Aeronautical Engineering Technion—Israel Institute of Technology, 1987.
Bencze William J.
Brumley Robert W.
Cohen Clark E.
Ferrell Barton G.
Gutt Gregory M.
Ingrassia Fisher & Lorenz P.C.
Phan Dao
The Boeing Company
LandOfFree
Methods and apparatus for a navigation system with reduced... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for a navigation system with reduced..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for a navigation system with reduced... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3944391