Patent ID: 7864878
Filing Date: 2011-01-04
Classification: H04L

Abstract:
1. A method for processing an Orthogonal Frequency Division Multiplexing (OFDM) signal, the method comprising: receiving the OFDM signal and generating a translated signal by translating the OFDM signal in frequency wherein at least one of a phase and gain imbalance is introduced between phase and quadrature components thereof, and a frequency offset relative to a main carrier of the OFDM signal is also introduced; converting the translated signal into a digital signal; processing the digital signal according to a compensation coefficient to generate a processed signal comprising a useful signal and an interfering signal depending on the imbalance and offset, the processing comprising reducing a contribution of the interfering signal to the processed signal; reducing an effect of the frequency offset by combining the processed signal with a compensation signal generated by a numeric control oscillator (NCO); and further processing at least a portion of the digital signal to obtain a reference signal indicative of an effect of the imbalance, and including combining the reference signal with the compensation signal.