Patent ID: 7944984

Claim:
An in-phase and quadrature (I/O) calibration system for a quadrature amplitude modulation (QAM) mode transceiver, the I/Q calibration system comprising: a signal generator configured to generate a reference in-phase (I) signal and a reference quadrature (Q) signal; an I/Q mismatch compensation module configured to generate a compensated I signal and a compensated Q signal based on (i) the reference I signal, (ii) the reference Q signal, (iii) an amplitude correction signal, and (iv) a phase correction signal; an I/Q mismatch calibration module configured to generate the amplitude correction signal and the phase correction signal; and a phase stepper module configured to vary a phase of at least one of the reference I signal or the reference Q signal based on (i) the amplitude correction signal and (ii) the phase correction signal.