Patent ID: 7653164

Claim:
A receiver comprising: an I/Q imbalance estimator for estimating frequency dependent and frequency independent IQ imbalance error of a received OFDM signal in combination with channel-induced error; and an adaptive filter system in communication with said I/Q imbalance estimator for generating one or more equalizing transformations for independently reducing an effect of the frequency dependent and frequency independent IQ imbalance error; wherein said adaptive filter system comprises: a first equalizer system for reducing an effect of the frequency independent IQ imbalance wherein the first equalizer system is adapted to generate a first transformation on the basis of a first portion of a spectrum of said received OFDM signal and a second transformation on the basis of a second portion of said spectrum; and a second equalizer system for reducing an effect of the frequency dependent IQ imbalance wherein the second equalizer system comprises N adaptive equalizers where N corresponds to a number of data bearing frequencies or subcarriers of the received OFDM signal spectrum, or combinations thereof.