| 摘要 |
A method, system, and an apparatus are provided for enhanced RFID system output control. A carrier field of an RFID reader is switched on in a controlled manner. A response signal from a passive RFID transponder located in the carrier field is received at the RFID reader. The response signal comprises a code related to the RFID transponder. Said code is detected and a time difference is determined between the switching on of the carrier field and the detection of the code signal. Said time difference provides a measure for the distance between the RFID transponder and the RFID reader.
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