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.