Systems and methods for compressive sensing ranging evaluation
First Claim
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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Accused Products
Abstract
RFID systems for locating RFID tags utilizing phased array antennas and compressed sensing processing techniques in accordance with embodiments of the invention are disclosed. In one embodiment of the invention, an RFID system includes at least one exciter that includes at least one transmit antenna, a phased antenna array that includes a plurality of receive antennas, and an RFID receiver system configured to communicate with the at least one exciter and connected to the phased antenna array, where the RFID receiver system is configured to locate an RFID tag by performing reads of the RFD tag at multiple frequencies, generating a measurement matrix, and determining a line of sight (LOS) distance between the activated RFID tag and each of the plurality of receive antennas by eliminating bases from the measurement matrix.
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Citations
22 Claims
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1. An RFID system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of determining a line of sight distance to an RFID tag comprising:
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activating an RFID tag at multiple frequencies using at least one exciter comprising at least one transmit antenna; reading the RFID tag at the multiple frequencies using an RFID receiver comprising at least one receive antenna and an RFID receiver system, the at least one receive antenna configured to receive a backscattered response signal from the activated RFID tag and the RFID receiver system configured to communicate with the at least one exciter and connected to 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 using the RFID receiver system; and determining a line of sight (LOS) distance between the activated RFID tag and each at least one receive antenna by eliminating bases from the measurement matrix using the RFID receiver system. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification