A self-calibrating transmitter includes an up-conversion mixing module,
summing module, calibration determination module, and a calibration
execution module. The up-conversion mixing module is operably coupled to
mix an I component of a base-band signal with an I component of a local
oscillation to produce a mixed I signal and is also operably coupled to
mix a Q component of the base-band signal with a Q component of the local
oscillation to produce a mixed Q signal. The summing module sums the
mixed I signal with the mixed Q signal to produce a modulated radio
frequency (RF) signal. The calibration determination module is operably
coupled to produce a calibration signal, which it generates by
interpreting the local oscillation and the modulated RF signal. The
calibration execution module is operably coupled to calibrate the DC
level of the I and/or Q component of the base-band signal, and/or the
gain of the I and/or Q component of the base-band signal based on the
calibration signal.