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Localization using virtual antenna arrays in modulated backscatter RFID systems

  • US 8,446,253 B2
  • Filed: 03/08/2010
  • Issued: 05/21/2013
  • Est. Priority Date: 03/11/2009
  • Status: Expired due to Fees
First Claim
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1. A localization method for use in a tag communication system, comprising:

  • associating a tag with an item;

    interrogating said tag by a reader which receives in turn a plurality of backscatter signals equally-spaced in time during movement of said reader;

    estimating a signal parameter of the backscatter signals of the plurality of backscatter signals to provide a plurality of derived signal parameters; and

    localizing the item in accordance with the plurality of derived signal parameters.

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