The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 2017
Filed:
Apr. 29, 2015
Applicant:
U-blox Ag, Thalwil, CH;
Inventor:
Christopher Brian Marshall, Reigate, GB;
Assignee:
U-BLOX AG, Thalwil, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J 3/16 (2006.01); H04W 56/00 (2009.01); G01S 19/42 (2010.01); G01S 5/02 (2010.01); G04R 40/06 (2013.01); G01S 19/23 (2010.01); G01S 19/24 (2010.01);
U.S. Cl.
CPC ...
H04W 56/0015 (2013.01); G01S 5/02 (2013.01); G01S 19/23 (2013.01); G01S 19/42 (2013.01); G04R 40/06 (2013.01); G01S 19/246 (2013.01);
Abstract
A method and apparatus for determining a drift between a local clock of a movable device and a reference clock that is used by one or more reference devices. The local clock may be calibrated at a calibration location and then the movable device may be moved to an operating location that is different from the calibration location. The drift is determined by observing one or more signals transmitted by the respective one or more reference devices, when the device is at the calibration location and when it is at the operating location. These observations are used together with a model of the signals to determine the drift.