Patent ID: 8179988

Claim:
A method of recovering at least one Orthogonal Frequency Division Multiplexed (OFDM) signal in a communication system, wherein said at least one OFDM-signal includes recurring redundant information, said method comprising the steps of: a) extracting a set of useful samples from the at least one OFDM-signal, the set including samples of recurring redundant information; b) producing at least one correlation matrix estimate from the at least one OFDM-signal; c) processing said set of useful samples using said at least one correlation matrix estimate to obtain symbol statistics from the extracted set of samples, wherein the processing step includes: c1) utilizing impairment matrices associated with different tones to form recovery sequences, wherein the recovery sequence for a tone k is determined from an effective tone sequence and an impairment correlation matrix which is estimated utilizing a residual frequency offset distribution; and c2) performing a correlation operation between the recovery sequences and the useful samples extracted from the OFDM-signal in order to obtain the symbol statistics; and d) recovering OFDM symbols from said symbol statistics.