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RFID reader and method for recognizing RFID tags

: Elsaid Ibrahim, Hazem; Kenawy, Hamed; Robert, Jörg; Heuberger, Albert; Strauß, Wolfram

Frontpage ()

EP 3206158 A1: 20160212
Patent, Electronic Publication
Fraunhofer IIS ()

The invention refers to an RFID reader (1) comprising a transmitter (2), a receiver (3), and an evaluator (4). The receiver (3) receives signals from RFID tags (10) within a given number of slots of a time frame with a given frame size (L) and provides a number of successful slots (ss) and a number of collided slots (cs). The evaluator (4) sets a modified frame size (L') based on an estimated number of RFID tags (n est ) which is determined based on the frame size (L), the number of successful slots (ss), and the number of collided slots (cs). The invention also refers to a corresponding method.