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Position tracking device and method

  • US 8,773,303 B2
  • Filed: 06/22/2007
  • Issued: 07/08/2014
  • Est. Priority Date: 06/22/2007
  • Status: Active Grant
First Claim
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1. Position tracking device, includingmeans for receiving positioning signals from a plurality of satellites at known positions;

  • means for determining a position estimate using a recursive filter adapted to receive as an input the positioning signals and a convergence parameter to adapt the filter characteristic of the recursive filter;

    means for obtaining a displacement estimate of the position tracking device;

    wherein the means for determining the position estimate is adapted to adjust the convergence parameter based on the displacement estimate to indicate a first velocity state of the position tracking device and a second velocity state of the position tracking device.

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