Abstract: A transceiver is provided which includes a transmitter for transmitting base band signals at a first operating frequency. The transmitter also includes a lookup table for storing correction coefficients for correcting the base band signals, a pre-distorter for correcting the base band signals and a receiver for receiving the base band signals transmitted by a remote transmitter in a first mode and by the transmitter in a second mode. The receiver includes apparatus for processing the received base band signals, a switching device for switching to the processing apparatus during the first mode and to the incoming signals to the lookup table updater during the second mode. The receiver also includes a lookup table updater, operative during the second mode, for receiving the signals transmitted by the transmitter and for updating the lookup table.