Patent ID: 7020220

Claim:
In an IQ receiver, a method of correcting mismatch errors between an I channel and a Q channel, the method comprising the steps of: injecting a calibration signal into an input of said IQ receiver, to produce an I N baseband signal and a Q N baseband signal at an output of said IQ receiver; determining an average power P I of said I N baseband signal, and an average power P Q of said Q N baseband signal; determining a cross-correlation R IQ between said I N baseband signal and said Q N baseband signal; determining a phase compensation factor C 1 based on said average power P I and said cross-correlation R IQ , said phase compensation factor C 1 determined to compensate for any phase error between said I N baseband signal and said Q N baseband signal; and determining an amplitude compensation factor C 2 based on said average power P I , said average power P Q , and said cross-correlation R IQ , wherein C 2 is determined to compensate for any amplitude error between said I N baseband signal and said Q N baseband signal.