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US 2003/0112176 A1Published application
Method and apparatus for determining location using a coarse position estimate
AssigneeQUALCOMM Incorporated
InventorsAlkinoos Vayanos, Peter Gaal
Life of this patent
Estimating the term…
Abstract
Corrections to a coarse position estimate of the pseudorange receiving device are made based upon knowledge of the amount of error present in inaccurate information (e.g., the old Almanac and/or Ephemeris) used to estimate the coarse position.
Claims3
A method for calculating an accurate position estimate based on a coarse position estimate, comprising:
- a) receiving the results of a coarse position determination calculation and a copy of information used to perform the coarse position determination calculation;
- and
- b) from the received information calculating correction to the coarse position determination calculation..
2 The method of claim 1, wherein the correction is used to calculate a more accurate position estimate than is provided by the coarse position determination.
A position identifying device comprising:
- a) a communication port;
- and
- b) a processing circuit coupled to the communication port, the processing circuit receiving from the communication port the results of a position determination calculation and a copy of information used to perform the position determination calculation and from the received information calculating a more accurate position determination.
Dependencies are inferred from the claim text.