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Systems and methods for compressive sensing ranging evaluation

  • US 9,983,299 B2
  • Filed: 07/10/2015
  • Issued: 05/29/2018
  • Est. Priority Date: 03/15/2013
  • Status: Active Grant
First Claim
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1. An RFID system comprising:

  • at least one exciter comprising at least one transmit antenna configured to transmit an activation signal to activate an RFID tag;

    at least one receive antenna configured to receive a backscattered response signal from the activated RFID tag;

    an RFID receiver system configured to communicate with the at least one exciter and connected to the at least one receive antenna, the RFID receiver system is configured to identify a line of sight (LOS) distance to an RFID tag by;

    performing reads of the RFID tag at multiple frequencies using the at least one exciter and the at least one receive antenna;

    generating a measurement matrix for each at least one receive antenna using the phase of the backscattered response signals from the activated RFID tag at each of the multiple frequencies; and

    determining the LOS distance between the activated RFID tag and each at least one receive antenna by eliminating bases from the measurement matrix.

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