Patent ID: 7623578

Claim:
An equalizer for a multi-carrier transmission system, for at least reducing delay dispersion in a signal, the equalizer comprising: a convertor arranged to use a sequence of consecutive samples of a multicarrier signal to derive oversampled frequency domain signals for reduction of dispersion of at least one symbol, the sequence having a length of at least two symbols; and a suppressor for suppressing time domain delay dispersion on the oversampled frequency domain signals using frequency-domain dispersion parameters, the suppressor being adaptive according to feedback provided by a suppressed dispersion frequency-domain output signal through updating of the frequency-domain dispersion parameters, the suppressor comprising: a parameter generator arranged to adaptively generate a set of updated frequency domain dispersion parameters to be implemented in the suppressor based at least in part, on an update; and an updating unit arranged to provide an update to the parameter generator based, at least in part, on the feedback; wherein the suppressor being is arranged to carry out Fourier transform based operations on odd frequency domain samples and separately carry out Fourier transform based operations on even frequency domain samples.