Method and apparatus for determining time in a satellite positioning system
April 16, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesHigh dynamic global positioning system receiver Method and apparatus for tracking the position and velocity of airborne instrumentation Position ambiguity resolution Radio telecommunications system and method with adaptive location determination convergence Locator device useful for house arrest and stalker detection Location system and method with acquisition of accurate location parameters GPS receiver having an initial adjustment for correcting for drift in reference frequency Integrity monitoring of location and velocity coordinates from differential satellite positioning systems signals Patent #: 5831576 InventorsAssigneeApplicationNo. 062232 filed on 04/16/1998US Classes:342/357.06, Using Global Positioning Satellite (GPS or Glonass)342/357.05Using Doppler frequency shiftExaminersPrimary: Tarcza, Thomas H.Assistant: Phan, Dao Attorney, Agent or FirmForeign Patent References
International ClassH04B 007/185AbstractA method and apparatus for determining a reference time associated with a satellite positioning system. In turn, the reference time, in one embodiment, may be used to determine other navigational information. Such navigational information may include, for example, the location/position of a satellite positioning system (SPS) receiver. In one embodiment, a relative velocity between an SPS receiver and a set of one or more satellites is used to determine an offset between time as indicated by the SPS receiver and the reference time. According to another embodiment of the invention, an error statistic is used to determine the reference time. According to yet another embodiment of the invention, two records, each representing at least a portion of a satellite message, are compared to determine time. In one implementation, the SPS receiver is mobile and operates in conjunction with a basestation to determine time and/or other navigational information according to one or a combination of the methods described. | |
