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Method and system for radio map filtering via adaptive clustering

  • US 20050266855A1
  • Filed: 05/28/2004
  • Published: 12/01/2005
  • Est. Priority Date: 05/28/2004
  • Status: Active Grant
First Claim
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1. A method for estimating a location of a wireless device in a wireless location system comprising:

  • forming a first set comprising the signal strength received from reference devices that the wireless device receives a signal from and an indicator of no signal strength measured for reference devices that the wireless device does not receive a signal from;

    forming a scan subset comprising reference devices in the first set that has an associated signal strength;

    forming a cluster comprising calibration points selected based on the scan subset; and

    calculating the distance between the first set and each of the calibration point in the cluster; and

    selecting the smallest distance as a location estimate.

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