Position location with low tolerance oscillator
AssigneeQUALCOMM Incorporated
InventorsGilbert C. Sih, Qiuzhen Zou
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Abstract
The present invention is a novel and improved method and apparatus for performing position location in wireless communications system. One embodiment of the invention comprises a method of performing position location in a wireless subscriber unit having a local oscillator, including the steps of receiving a position location request, acquiring a timing signal when a sufficient period of time has elapsed since the local oscillator has been corrected and correcting said local oscillator using a correction signal based on said timing signal, substantially freezing the correction signal, performing a position location procedure using the local oscillator with the correction signal applied, and ending said position location procedure.
Claims6
A method of performing position location in a wireless subscriber unit having a local oscillator, comprising the steps of:
- receiving a position location request;
- acquiring a timing signal a period of time after the local oscillator had been corrected and correcting said local oscillator using a correction signal based on said timing signal;
- substantially freezing the correction signal;
- performing a position location procedure using the local oscillator with the correction signal applied;
- and
- ending said position location procedure.
Dependencies are inferred from the claim text.