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Determining position without use of broadcast ephemeris information

DC
  • US 7,142,157 B2
  • Filed: 09/14/2004
  • Issued: 11/28/2006
  • Est. Priority Date: 09/14/2004
  • Status: Expired due to Term
First Claim
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1. A method for determining a position of a client device, comprising:

  • receiving historical state data for at least one satellite of a satellite-based positioning system;

    continuously predicting satellite states for future time periods using the historical state data;

    transferring data representative of the predicted satellite states to the client device via a first communication link;

    selectively reconstructing at least one reconstructed satellite state in the client device using the transferred data; and

    determining the position of the client device using the at least one reconstructed satellite state along with timing information of satellite data received on a second communication link.

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