Patent ID: 7830954

Claim:
A method of compensating for phase imbalance and amplitude imbalance between corresponding in-phase signals and quadrature-phase signals in a wireless receiver, the method comprising: providing a plurality of test tones of various frequencies to the receiver; determining, for each of the test tones, a respective phase imbalance and a respective amplitude imbalance between an in-phase signal and a quadrature-phase signal of the test tone, the respective phase imbalance and the respective amplitude imbalance each having a frequency dependent component; determining a set of filter coefficients based on the determined phase and amplitude imbalances of the plurality of test tones; applying the set of filter coefficients to a plurality of filters; compensating for a frequency dependent phase imbalance between an in-phase signal and a quadrature-phase signal of a received wireless signal using a first filter of the plurality of filters; and compensating for a frequency dependent amplitude imbalance between the in-phase signal and the quadrature-phase signal of the received wireless signal using a second filter of the plurality of filters.