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Wide area positioning system

  • US 9,591,438 B2
  • Filed: 12/23/2013
  • Issued: 03/07/2017
  • Est. Priority Date: 09/10/2008
  • Status: Active Grant
First Claim
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1. A method for estimating one or more positions of a receiver, wherein the method comprises:

  • generating, for each of a plurality of positioning signals transmitted from a plurality of terrestrial transmitters and received by the receiver, a cross-correlation function by cross-correlating one or more signal samples extracted from that positioning signal with a reference sequence corresponding to that positioning signal;

    determining a vector of cross-correlation samples from each cross-correlation function;

    identifying, for each of the positioning signals, a time of arrival estimate corresponding to an earliest arriving signal path of one or more signal paths corresponding to that positioning signal using a high resolution time of arrival measurement method; and

    estimating a first position of the receiver based on the time of arrival estimate.

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