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

Claim 0:
1. A system for calibrating a radio frequency identification (RFID) detector, the system comprising:
two or more antenna ports configured to be communicatively coupled to two or more antennas via respective RF cables; and
a controller operatively connected to the two or more antenna ports, wherein the controller is configured to implement a calibration interrogation cycle by:
assigning each of the two or more antenna ports a unique sequence of on signals and off signals,
dividing the calibration interrogation cycle into a plurality of sequential slots,
configuring 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 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 two or more antenna ports.