Patent ID: 8638893

Claim:
A method for compensating for I/Q impairments of a receiver, the method comprising: receiving an analog input signal; performing I/Q demodulation on the analog input signal to produce an analog inphase (I) signal and an analog quadrature (Q) signal; digitizing the analog I signal and the analog Q signal to produce respectively a digital I signal and a digital Q signal; filtering the digital I signal and the digital Q signal in accordance with a 2×2 matrix of digital filters to produce a filtered digital I signal and a filtered digital Q signal, wherein the 2×2 matrix of digital filters at least partially compensates for I/Q impairments of the receiver over a range of frequencies, wherein a frequency response of at least one diagonal component of the 2×2 matrix is computed based on measurements of the I/Q impairments as a function of frequency and the measurements of the I/Q impairments as a function of a negative of frequency, wherein a frequency response of at least one non-diagonal component of the 2×2 matrix is computed based on the measurements of the I/Q impairments as a function of frequency and measurements of the I/Q impairments as a function of the negative of frequency.