GPS receiver utilizing a communication link
December 4, 2016. 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 ReferencesNavigation system and method Global positioning system receiver Receivers for navigation satellite systems Method of doppler searching in a digital GPS receiver Digital global positioning system receiver Method and apparatus for deriving pseudo range from earth-orbiting satellites Efficient detection and signal parameter estimation with application to high dynamic GPS receiver CPS transform correlation receiver and method Cellular position locating system Vehicle location system InventorAssigneeApplicationNo. 759523 filed on 12/04/1996US Classes:342/357.02, With accuracy enhancing342/357.05, Using Doppler frequency shift701/213Using Global Positioning System (GPS)ExaminersPrimary: Blum, Theodore M.Attorney, Agent or FirmForeign Patent References
International ClassesH04B 007/185G01S 005/02 AbstractA precision carrier frequency signal for calibrating a local oscillator of a GPS receiver which is used to acquire GPS signals. The precision carrier frequency signal is used to calibrate the local oscillator such that the output of the local oscillator, which is used to acquire GPS signals, is modified by a reference signal generated from the precision carrier frequency signal. The GPS receiver locks to this precision carrier frequency signal and generates the reference signal. In another aspect of the invention, satellite almanac data is transmitted to a remote GPS receiver unit from a basestation via a communication link. The remote GPS receiver unit uses this satellite almanac data to determine approximate Doppler data for satellites in view of the remote GPS receiver unit.Other References
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