Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2005-08-30
2009-10-27
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
Reexamination Certificate
active
07609204
ABSTRACT:
An improved system and method is disclosed for dynamically estimating the output variances of carrier-smoothing filters used, for example, in GPS receivers. By accurately estimating the output variances of the carrier-smoothing filters as they transition from initialization to steady-state operation, it is possible to calculate any required protection levels without having to wait for the filters to fully stabilize. As one example, a system for estimating output variances of a carrier-smoothing filter for use in a satellite navigation system receiver is disclosed, which includes a plurality of smoothing filters associated with a navigation processing unit in a satellite navigation receiver. One or more processors associated with the navigation processing unit executes an algorithm for each smoothing filter, which provides a method for dynamically calculating an output variance for a respective smoothing filter as it transitions in response to new input variance values. The method also predicts the settling point of the output variance for that smoothing filter given a set of pseudorange and carrier-phase values to be applied. Therefore, using this novel output variance prediction method, precision navigation applications such as, for example, airborne GPS-based precision landing system applications can begin operations with suitable calculated protection level values without having to wait for the smoothing filters to stabilize. Thus, such precision landing systems are available for use as soon as the required protection level values are reached.
REFERENCES:
patent: 3137459 (1964-06-01), Smith et al.
patent: 3603994 (1971-09-01), Williams et al.
patent: 3975731 (1976-08-01), Latham et al.
patent: 4578678 (1986-03-01), Hurd
patent: 4737794 (1988-04-01), Jones
patent: 4807256 (1989-02-01), Holmes et al.
patent: 5018218 (1991-05-01), Peregrim et al.
patent: 5296861 (1994-03-01), Knight
patent: 5323322 (1994-06-01), Mueller et al.
patent: 5343212 (1994-08-01), Rose et al.
patent: 5450448 (1995-09-01), Sheynblat
patent: 5459473 (1995-10-01), Dempster et al.
patent: 5471217 (1995-11-01), Hatch et al.
patent: 5563917 (1996-10-01), Sheynblat
patent: 5594453 (1997-01-01), Rodal et al.
patent: 5629708 (1997-05-01), Rodal et al.
patent: 5740048 (1998-04-01), Abel et al.
patent: 5751777 (1998-05-01), Zampetti
patent: 5774387 (1998-06-01), Marshall
patent: 5774829 (1998-06-01), Cisneros et al.
patent: 5796773 (1998-08-01), Sheynblat
patent: 5825326 (1998-10-01), Semler et al.
patent: 5828336 (1998-10-01), Yunck et al.
patent: 5831575 (1998-11-01), Gu
patent: 5883595 (1999-03-01), Colley
patent: 5937349 (1999-08-01), Andresen
patent: 5993110 (1999-11-01), Bueno
patent: 6052082 (2000-04-01), Hassan et al.
patent: 6163754 (2000-12-01), Zhang et al.
patent: 6195040 (2001-02-01), Arethens
patent: 6198430 (2001-03-01), Hwang et al.
patent: 6204808 (2001-03-01), Bloebaum et al.
patent: 6266009 (2001-07-01), Hwang
patent: 6311127 (2001-10-01), Stratton et al.
patent: 6311129 (2001-10-01), Lin
patent: 6329946 (2001-12-01), Hirata et al.
patent: 6345232 (2002-02-01), Lynch et al.
patent: 6760663 (2004-07-01), Brenner
patent: 6778136 (2004-08-01), Gronemeyer
patent: 6804313 (2004-10-01), Skafidas et al.
patent: 6832155 (2004-12-01), Draganov
patent: 6944541 (2005-09-01), Pasturel et al.
patent: 7117417 (2006-10-01), Sharpe et al.
patent: 7139354 (2006-11-01), Izumi et al.
patent: 7151405 (2006-12-01), Nezami
patent: 2001/0020214 (2001-09-01), Brenner
patent: 2002/0147544 (2002-10-01), Nicosia et al.
patent: 2003/0052817 (2003-03-01), Diggelen
patent: 2003/0187575 (2003-10-01), King et al.
patent: 2004/0093130 (2004-05-01), Osder et al.
patent: 2004/0135721 (2004-07-01), Hoven et al.
patent: 2004/0225438 (2004-11-01), Draganov
patent: 2005/0135700 (2005-06-01), Anderson
patent: 2005/0203702 (2005-09-01), Sharpe et al.
patent: 2005/0212696 (2005-09-01), Bartone et al.
patent: 2006/0047413 (2006-03-01), Lopez et al.
patent: 0 694 791 (1996-01-01), None
patent: 1057583 (1967-02-01), None
patent: 1 554 751 (1979-10-01), None
patent: 2 208 631 (1989-04-01), None
patent: 2 211 041 (1989-06-01), None
patent: WO 03-081977 (2003-10-01), None
TAES-200401167-H.K.Lee and C.Rizos, Position-Domain Hatch Filter For Kinematic Differential GPS/GNSS.
Lee, H.K, Position-Domain Hatch Filter For Kinematic Differential GPA/GNSS, Apr. 2, 2004, TAES-200401167.
Lee, H.K, “Position-Domain Hatch Filter For Kinematic Differential GPS/GNSS”, TAES-200401167.
McGraw et al., “Development of the LAAS Accuracy Models,” ION GPS 2000, Sep. 19-22, 2000, Salt Lake City, UT, pp. 1212-1223.
Sayim et al., “Experimental and Theoretical Results on the LAAS Sigma Overbound,” ION GPS 2002, Sep. 24-27, 2002, Portland, OR, pp. 29-38.
Shively et al., “Impact of Carrier Smoothing on Event Probabilities in LAAS,” ION 58thAnnual Meeting/CIGTF 21stGuidance Test Symposium, Jun. 24-26, 2002, Albuquerque, NM, pp. 195-205.
Brenner, “Integrated GPS LAAS/Inertial Guidance System Using Multiple Kalman Filters,” Honeywell, 10 pages.
“Minimum Aviation System Performance Standards for the Local Area Augmentation System (LAAS),” RTCA, Inc., 1998.
“GNSS-Based Precision Approach Local Area Augmentation System (LAAS) Signal-in-Space Interface Control Document (ICD),” RTCA, Inc., Nov. 28, 2001.
“Minimum Operational Performance Standards for GPS Local Area Augmentation System Airborne Equipment,” RTCA, Inc., Nov. 28, 2001.
Swider R. et al., “Recent developments in the LAAS program GPS”, Position Location and Navigation Symposium, IEEE 1998, Palm Springs, CA USA, Apr. 20-23, 1998, New York, NY, USAA, IEEE, US, Apr. 20, 1998, pp. 441-470, XP010276866, ISBN: 978-0-7803-4330-6.
Enge P., “Local Area Augmentation of GPS for the Precision Approach of Aircraft”, Proc IEEE, vol. 87, No. 1, vol. 87, No. 1, Jan. 1, 1999, XP011044139, ISSN: 0018-9219.
May Reed R.
Morgan Kenneth S.
Fogg & Powers LLC
Honeywell International , Inc.
Nguyen Nga X
Tarcza Thomas H
LandOfFree
System and method for dynamically estimating output... 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 dynamically estimating output..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for dynamically estimating output... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4061187