An object identification system includes a monitor and a plurality of transceivers
that communicate over a common medium. The monitor includes a first transmitter,
a first receiver, and a processor. Each transceiver includes a resonant circuit,
a transmitter, a receiver, and an antenna coupled to the resonant circuit. The
processor performs a method for performing transceiver communication that includes
the steps of: (a) transmitting from the first transmitter a first frequency for
a first duration; (b) after lapse of the first duration, receiving via the first
receiver a response signal from at least one of the resonant circuits; (c) determining
a second frequency from the received response signal; and (d) performing transceiver
communication using the second frequency. Transceivers of the type having a resonant
circuit coupled to an antenna, when operating in close proximity to each other,
may interfere with the response from a single transceiver by absorbing the energy
intended to be received by the transceiver, absorbing the energy transmitted by
the transceiver, or altering the resonant frequency of the resonant circuit. By
determining the second frequency for transceiver communication, the monitor may
establish communication with the single transceiver at a frequency better suited
for transferring operative power to the transceiver, conducting an interrogation
protocol for identifying the transceiver, or for data transfer.