Patent ID: 8509292

Claim:
A receiver comprising: a frequency converter configured to generate an in-phase (I) signal and a quadrature-phase (Q) signal from each band of a multiband signal; a mismatch compensator configured to estimate a mismatch between the I signal and the Q signal for each of the bands of the multiband signal and store at least one compensation value to compensate for the estimated mismatch; an analog-to-digital converter configured to perform analog-to-digital conversion on the I signal and the Q signal and to output a digital I signal and a digital Q signal; and a demodulator configured to receive the digital I signal and the digital Q signal and to perform demodulation on each of the digital I and Q signals to generate a corresponding demodulated digital I signal and a demodulated digital Q signal, wherein the frequency converter is further configured to compensate for the mismatch between the I signal and the Q signal based on the at least one compensation value, and wherein the demodulator comprises a fast Fourier transform (FFT) block configured to perform a FFT on the digital I signal mixed with one of the compensation values and to perform a FFT on the digital Q signal mixed with another one of the compensation values.