Patent ID: 11880735
Assignee: ZEBRA TECHNOLOGIES CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 24:
25. A computer-implemented method for calibrating a radio frequency identification (RFID) detector comprising (i) two or more antenna ports configured to be communicatively coupled to two or more antennas via respective RF cables, and (ii) a controller operatively connected to the two or more antenna ports, the method comprising:
assigning, via the controller, each of the two or more antenna ports a unique sequence of on signals and off signals;
dividing, via the controller, an interrogation signal into a plurality of sequential slots;
configuring, via the controller, the plurality of sequential slots such that, during each cycle of the calibration interrogation cycle, a sequence of antenna ports assigned to the plurality of slots embeds the unique sequence of on signals and off signals assigned to the two or more antenna ports; and
sequentially transmitting, via the controller, a plurality of interrogation signals via the two or more antenna ports in accordance with the antenna ports assigned to the plurality of sequential slots to determine whether a sequence of indications provided by an RF sensor corresponds to the unique sequence of on signals and off signals for the antenna port.