Method and device for locating an RFID transponder and RFID system
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsRafael Psiuk, Tobias Draeger, Joern Thielecke, Alfred Mueller, Maximilian Singh
Life of this patent
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Abstract
A method for locating an RFID transponder is proposed. The method comprises generating a plurality of measurement signals based on a magnetic field measured by a plurality of sensors. The method further comprises determining a respective degree of correlation for each of the plurality of measurement signals with a reference signal. The reference signal is based on a data sequence assigned to the RFID transponder. In addition, the method comprises determining a position of the RFID transponder based on the degrees of correlation of the plurality of measurement signals.
Claims25
A method for locating an RFID transponder, comprising:
- generating a plurality of measurement signals based on a magnetic field generated from an RFID transponder and measured by a plurality of sensors simultaneously at a respective position of the sensors;
- determining a respective correlation peak value for each of the plurality of measurement signals with a reference signal by cross-correlating each of the plurality of measurement signals with the reference signal to generate a set of correlation peak values, the reference signal being based on a data sequence assigned to the RFID transponder;
- and
- determining a position of the RFID transponder based on the set of correlation peak values of the plurality of measurement signals.
A device for locating an RFID transponder, comprising:
- a plurality of sensors configured to generate a plurality of measurement signals based on a magnetic field generated by an RFID transponder and measured by the plurality of sensors simultaneously at a respective position of the sensors;
- and
- a processing circuit configured to:
- determine a respective correlation peak value for each of the plurality of measurement signals with a reference signal by cross-correlating each of the plurality of measurement signals with the reference signal to generate a set of correlation peak values, the reference signal being based on a data sequence assigned to the RFID transponder;
- and
- determine a position of the RFID transponder based on the set of correlation peak values of the plurality of measurement signals.
Dependencies are inferred from the claim text.