A decision feedback equaliser and a method of operating a decision feedback equaliser

摘要

A decision feedback equalizer includes a transversal feedforward digital filter section (16) and a recursive feedback digital filter section (18) including a decision stage (20). In order to optimize the performance of the equalizer, the reference tap position is preferably aligned with a storage location of the feedforward filter section (16) containing the first sample of a current symbol and any contemporaneous samples of preceding symbols, the second and subsequent samples of the current symbol being contained in other storage locations of the feedforward filter section (16). In the case of data being in bursts a better performance may be obtained by time reversing the data applied to the feedforward filter section (16).