Methods and apparatuses for reducing errors in the measurement of the coordinates and time offset in satellite positioning system receivers

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO

6337657

SERIAL NO

09522323

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Disclosed are methods and apparatuses for generating the estimates of receiver's coordinates and/or time offset for a moment of time t.sub.n without large errors caused by short-term shading of a part of the observable global positioning satellites and also without large dynamic errors caused by the receiver movement. The receiver may be stationary or mobile (i.e., rovering). A set of snapshot-solution values for the position coordinates and time offset of the receiver at the time moment t.sub.n, and a set of predicted values for the position coordinates and time offset of the receiver at the time moment t.sub.n are generated. The accuracy of each of these sets are determined, and a set of refined estimates for the position and time offset of the receiver is generated based the snapshot solution values, the predicted position values, and the accuracies.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TOPCON GPS LLCPLEASANTON, CA38

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ashjaee, Javad Saratoga, CA 48 665
Zagnetov, Peter P Moscow, RU 1 18
Zhodzishsky, Mark I Moscow, RU 18 185

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 5323163 All DOP GPS optimization 63 1993
 
TRIMBLE NAVIGATION LIMITED (2)
* 5296861 Method and apparatus for maximum likelihood estimation direct integer search in differential carrier phase attitude determination systems 132 1992
5590043 Satellite positioning system filter 31 1993
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
QUALCOMM INCORPORATED (1)
* 2007/0041,457 Method and apparatus for providing antenna diversity in a wireless communication system 116 2005
 
Mapvision Oy Ltd. (1)
* 7324712 Quality factor 0 2002
 
GENERAL ELECTRIC COMPANY (1)
* 2009/0238,404 METHODS FOR USING DEFORMABLE MODELS FOR TRACKING STRUCTURES IN VOLUMETRIC DATA 4 2008
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (3)
8249371 Selective predictor and selective predictive encoding for two-dimensional geometry compression 1 2007
* 2008/0205,779 SELECTIVE PREDICTOR AND SELECTIVE PREDICTIVE ENCODING FOR TWO-DIMENSIONAL GEOMETRY COMPRESSION 1 2007
8917947 Selective predictor and selective predictive encoding for two-dimensional geometry compression 0 2012
 
COLOPLAST A/S (1)
* 2003/0153,860 Dressing 13 2003
 
TOPCON POSITIONING SYSTEMS, INC. (1)
9535161 Positioning quality of global navigation satellite system receivers 0 2012
 
AMERICAN GNC CORPORATION (2)
* 6510354 Universal robust filtering process 8 2000
* 6757569 Filtering process for stable and accurate estimation 6 2001
 
SAMSUNG ELECTRONICS CO., LTD. (3)
* 6567712 Method for determining the co-ordinates of a satellite 12 2000
* 7333579 Robust symbol timing recovery circuit for telephone line modem 1 2003
* 2004/0047,463 Robust symbol timing recovery circuit for telephone line modem 1 2003
 
DRS SIGNAL SOLUTIONS, INC. (2)
* 6922635 Method and system for determining absolute positions of mobile communications devices using remotely generated positioning information 33 2003
* 2004/0034,471 Method and system for determining absolute positions of mobile communications devices using remotely generated positioning information 5 2003
 
FUJITSU LIMITED (2)
* 7542532 Data transmission device and input/output interface circuit 2 2004
* 2004/0252,802 Data transmission device and input/output interface circuit 14 2004
 
NOKIA TECHNOLOGIES OY (2)
* 8843251 Positioning satellites 0 2009
* 9274228 Positioning satellites 0 2014
 
NOKIA SOLUTIONS AND NETWORKS OY (2)
* 6876925 Two-stage interacting multiple models filter for use in a global positioning system 2 2003
* 2004/0138,813 Two-stage interacting multiple models filter for use in a global positioning system 0 2003
 
CSR TECHNOLOGY INC. (3)
* 6665612 Navigation processing for a satellite positioning system receiver 2 2001
* 7751974 Navigation processing for a satellite positioning system receiver 2 2005
* 2005/0267,682 Navigation processing for a satellite positioning system receiver 1 2005
 
GMV AEROSPACE AND DEFENCE S.A. (3)
* 2006/0047,413 GNSS navigation solution integrity in non-controlled environments 14 2004
8131463 GNSS navigation solution integrity in non-controlled environments 4 2009
* 2010/0033,370 GNSS NAVIGATION SOLUTION INTEGRITY IN NON-CONTROLLED ENVIRONMENTS 12 2009
 
TRIMBLE NAVIGATION LIMITED (1)
* 8134497 Method and system for location-dependent time-specific correction data 11 2008
 
Topcon GPS LLC (2)
* 7522099 Position determination using carrier phase measurements of satellite signals 15 2005
* 2007/0052,583 Position determination using carrier phase measurements of satellite signals 22 2005
* Cited By Examiner