Patent ID: 7432814

Claim:
An RFID reader system comprising: an antenna; and an operational processing block coupled to the antenna and operable to select a first one of a plurality of communication channels; adjust an own waveform shaping parameter responsive to RF energy detected in conjunction with using the selected channel; cause the antenna to transmit to RFID tags first RF waves in the selected channel such that second RF waves are backscattered from the RFID tags in response to the first RF waves, in which at least some of one of the first RF waves and the second RF waves have a waveform with a shape according to the adjusted own waveform shaping parameter; store a first channel parameter value associated with the adjusted waveform shaping parameter; then select a second one of the channels; operate in the selected second channel by transmitting to the RFID tags third RF waves in the second channel and receiving fourth RF waves backscattered from the RFID tags in response to the third RF waves; readjust the own waveform shaping parameter concurrently with operating in the selected second channel; reselect the first channel and reconstruct the own waveform shaping parameter from the stored first channel parameter value; and then transmit to the RFID tags fifth RF waves in the reselected first channel and receive sixth RF waves backscattered from the RFID tags in response to the fifth RF waves, at least some of the fifth and the sixth RF waves having a waveform with a shape according to the reconstructed own waveform shaping parameter.