Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2007-04-19
2010-11-02
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
Reexamination Certificate
active
07825854
ABSTRACT:
A GPS transponder system incorporating a phase error monitoring and compensation subsystem. The phase error monitoring and compensation subsystem includes a demodulator subsystem that demodulates modulated carrier signals being output from each one of a pair of GPS transponders to obtain the navigation codes being generated by each of the transponders from their respective carrier signals. The navigation codes obtained from the modulated carrier signals are compared to separate navigation codes that are generated by a navigation data unit (NDU) of the system and supplied over a thermally stable signal transmission line. The signal transmission line has a known, fixed delay and is not affected by temperature changes that affect the modulated carrier signals. A phase comparator subsystem uses the comparison to generate needed error correction signals that are applied via phase shifters to each of the transponders. The error correction signals modify the modulated carrier signals to remove the influence caused by temperature variations that the transponders experience during operation.
REFERENCES:
patent: 5440491 (1995-08-01), Kawano et al.
patent: 5781156 (1998-07-01), Krasner
patent: 5812961 (1998-09-01), Enge et al.
patent: 6266007 (2001-07-01), Lennen
patent: 6373432 (2002-04-01), Rabinowitz et al.
patent: 6914931 (2005-07-01), Douglas et al.
patent: 7437138 (2008-10-01), Woo
patent: 2007/0010212 (2007-01-01), Torimoto et al.
ION GNSS 18th International Technical Meeting of the Satellite Division, Sep. 13-16, 2005, Long Beach, CA, p. 1154-1159.
GPS World News and Applications of the Global Position System, Apr. 1998, “Of Mutual Benefit: Merging GPS and Wireless Communications”, p. 44-48.
Inside GNSS, Apr. 2006, “NovAtel Gets New Financial Marks, Launches First Galileo Receiver,” p. 61.
Kaplan, Elliott D. “Understanding GPS Principles and Applications,” p. 212-213, 220-223.
Lozow, J. B. Navigation: Journal of the Institute of Navigation, vol. 44, No. 1, Spring 1997, Analysis of Direct P(Y)-Code Acquisition, p. 89-97.
Dierendonck, A.J. Van. Institute of Navigation Satellite Division's 4th International Technical Meeting. ION GPS-91, Albuquerque, MN, Sep. 9-13, 1991, “Novatel's GPS Receiver. The High Performance OEM Sensor of the Future.”
DiEsposti, Raymond; Saks, Steven; Jocic, Lubo; Abbott, Anthony. The Aerospace Corporation. “The Benefits of Integrating GPS, INS, and PCS,” p. 327-331.
DiEsposti, Raymond; DiLellio, James; Kelley, Clifford. Navigation Systems, The Boeing Company.; Dorsey, Arthur; Management & Data Systems, Martin, Lockheed; Fliegel, Henry, Berg, John; Edgar, Clyde, GPS JPO, The Aerospace Corporation; McKendree, Thomas, Navigation and Landing Systems; Fullerton, Raytheon; Shome, Pradipta, Office of Commercial Space Transportation, Federal Aviation Administration. ION NTM 2004, Jan. 26-28, 2004, San Diego, CA. “The Proposed State Vector Representation of Broadcast Navigation Message for User Equipment Implementation of GPS Satellite Ephemeris Progagation,” p. 294-312.
Harness & Dickey & Pierce P.L.C.
Nguyen Nga X
Tarcza Thomas H
The Boeing Company
LandOfFree
System and method for compensating for temperature effects... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for compensating for temperature effects..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for compensating for temperature effects... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4179516