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Navigation system using radio frequency tags

  • US 7,339,523 B2
  • Filed: 12/05/2005
  • Issued: 03/04/2008
  • Est. Priority Date: 12/05/2005
  • Status: Active Grant
First Claim
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1. A method of determining a location, the method comprising:

  • placing a plurality of radio frequency (RF) tags within an area;

    mapping the placement of the plurality of RF tags within the area;

    detecting one or more of the plurality of RF tags in the area; and

    determining a location based in part on the mapping and on probability distributions associated with each of the one or more detected RF tags, wherein each probability distribution represents the probability of detecting its associated RF tag from each of a plurality of locations.

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