Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2007-07-10
2007-07-10
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C342S357490, C342S357490
Reexamination Certificate
active
10667628
ABSTRACT:
A system is provided for detecting a low-power error condition in a local area augmentation system (LAAS). The system receives a radio signal from a global positioning system (GPS) satellite and measures the wide band and narrow band power of the radio signal in real time. The system estimates the signal-to-noise ratio of the signal in real time based on average wide band and narrow band power measurements. A low signal-to-noise ratio indicates a low power condition. The system then calculates an error contribution due to the low power condition and sums the error contribution with other error contributions to determine the total error in a navigational measurement. To ensure error overbounding, the system may subtract a confidence offset from the signal-to-noise ratio to obtain a lower confidence limit.
REFERENCES:
patent: 5903654 (1999-05-01), Milton
patent: 6121923 (2000-09-01), King
patent: 6219373 (2001-04-01), Lee et al.
patent: 6295024 (2001-09-01), King et al.
patent: 6313789 (2001-11-01), Zhodzishsky et al.
patent: 6331835 (2001-12-01), Gustafson
patent: 6384774 (2002-05-01), Mutoh
patent: 6407699 (2002-06-01), Yang
patent: 6587075 (2003-07-01), Loh et al.
patent: 0 436 854 (1996-03-01), None
C.J. Comp et al., Adaptive SNR-based carrier phase multipath mitigation technique, IEEE Transactions on Aerospace and Electronic Systems, vol. 34(1), p. 264-276, Jan. 1998.
J.K. Ray et al., GPS code and carrier multipath mitigation using a multiantenna system, IEEE Transactions on Aerospace and Electronic Systems, vol. 37(1), p. 183-195, Jan. 2001.
L. Legrand et al., Real-time minimization of the total tracking error in phase an delay lock loops—a second approach of th fast adaptive bandwith algorithm, Navigation (France), vol. 50(197), p. 37-46, Jan. 2002.
B.W. Parkinson et al. (ed.), Global Positioning System: Theory and Applications, vol. I, American Institute of Aeronautics and Astronautics, Inc., p. 390-394, 1996.
R. Braff et al., Derivation of ranging source integrity requirements for the Local Area Augmentation System (LAAS), Navigation Journal-of-the-Institute-of-Navigation (USA), vol. 47(4), p. 279-88, Winter 2000-2001.
“Category I Local Area Augmentation System Ground Facility”, Specification FAA-E- 2937 A; United States Department of Transportation Federal Aviation Administration, Apr. 17, 2002.
Ward, Phillip, “Effects of RF Interference On GPS Satellite Signal Receiver Tracking,” Understanding GPS Principles and Applications, Chapter 6, pp. 209-236, 1996.
Jakab, A., “An Approach to GPS Satellite Failure Detection,” NovAtel Inc.
Hartman, Randy, “LAAS Government Industry Partnership (GIP),” Honeywell International Inc.
Hartman, Randy, “Precision Approach Using Differential GPS,” Honeywell International Inc.
Ray, J.K., et al., “Characterization of GPS Carrier Phase Multipath,” Department of Geomatics Engineering, university of Calgary, Alberta, Canada, ION NTM-99, San Diego, Jan. 25-27, 1999.
Maurer, M. et al., “Advanced Receiver Technology For Existing and Future Satellite Navigation Systems,” International Journal of Satellite Communications, 2000; 18: pp. 347-364.
Upadhyay, Triveni et al., “Test Results on Mitigation of SATCOM-Induced Interference to GPS Operation,” http://www1.faa.gov/and/and300/datalink/dlsys/satcom.htm, printed Feb. 4, 2003.
“About the Radio Frequency Interference Monitoring System (RFIMS),” Institute For Telecommunications Sciences, http//www.its.bldrdoc.gov/home/programs/rfims/rfims.html, printed May 2003.
Legrand, Fabrice et al., “Real-Time Minimization of the Total Tracking Error In Phase and Delay Lock Loops—A Second Approach of the Fast Adaptive Bandwidth Algorithm,” http://www.recherche.enac.fr/itst/papers/ion—am—01.pdf, printed May 2003.
Saarnisaari, Harri, “Phase Interference Extractor Interference Canceller In DS/SS Code Synchronization,” http://www.cwc.oulu.fi/home/projects/AWICS/awics—pub/2000/harri—saarnisaari—euroco00.pdf, printed Mar. 17, 2003.
Landry, Rene Jr. et al., “Analysis of Potential Interference Sources and Assessment of Present Solutions For GPS/GNSS Receivers,” 4thSaint-Petersburg on INS, May 26-28, 1997.
Ali-Ahmad, Walid, Ph.D., “RF System Issues Related to CDMA Receiver Specifications,” RF Standards, Sep. 1999.
“Adaptive Interference Cancellation : The Latest Weapon Against Interference,” http://www.cyberrf.com/appnote/canc/cancAppnote2.htm, printed Feb. 4, 2003, pp. 1-5.
Butsch, Felix, “Innovation: A Growing Concern Radiofrequency Interference and GPS,” GPS World, Oct. 2002.
Macabiau, Christophe et al., “Use of MultiCorrelator Techniques For Interference Detection,” http://www.recherche.enac.fr/Itst/papers/ion—ntm—2001—interf.pdf, printed Mar. 17, 2003.
Bastide, Frederic et al., “GPS Interference Detection and Identification Using Multicorrelator Receivers,” http://www.recherche.enac.fr/ext/Itst/papers/ion—gps—01.pdf, printed on Mar. 10, 2003.
Maenpa, Jon E. et al., “New Interference Rejection Technology From Leica,” Leica Geosystems Inc., Sep. 1997.
Ober, P.B. et al., “The Suitability of GPS For Basic Area Navigation,” 10thInternational Technical Meeting of the Satellite Division of the Institute of Navigation, ION GPS-97, Sep. 16-19, 1997.
Volpe, John A., “Vulnerability Assessment of the Transportation Infrastructure Relying On the Global Positioning System,” Final Report, U.S. Department of Transportation, Aug. 29, 2001.
Gromov, Konstantin, “GIDL: Generalized Interference Detection and Localization System,” Dissertation submitted to the Department of Aeronautics and Astronautics and the Committee on Graduate Studies of Stanford University in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Mar. 2002.
Phlets, Robert Eric, “Multicorrelator Techniques For Robust Mitigation of Threats to GPS Signal Quality,” A dissertation submitted to the department of mechanical engineering and the committee of graduate studies of Stanford University in partial fulfillment of the requirements for the degree of Doctor of Philosophy, Jun. 2001.
International Search Report, PCT/US03/30050.
Honeywell International , Inc.
McDonnell Boehnen & Hulbert & Berghoff LLP
Mull Fred H.
LandOfFree
Low power detection and compensation for satellite systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low power detection and compensation for satellite systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low power detection and compensation for satellite systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3812936