A calibration module includes a first input that receives a reference
signal, a second input that receives a crosstalk signal, and first and
second absolute value modules that generate first and second magnitude
signals based on the reference signal and the crosstalk signal,
respectively. A first module generates an amplitude correction signal for
a quadrature-amplitude modulated (QAM) signal based on the first and
second magnitude signals. A second module generates a phase correction
signal for the QAM signal based on the reference signal and the crosstalk
signal.