AN ADAPTIVE LINEAR CHANNEL EQUALIZER USING ASYMMETRIC TRANSVERSAL FILTER AND THE EQUALIZING METHOD OF IT

摘要

An adaptive linear channel equalizer having an asymmetrical filter structure and an equalizing method thereof are provided to locate a main tap at a left end of a filter in setting a filter coefficient for removing precursor-ISI(Inter-Symbol Interference) and locate the main tap at a right end thereof in setting a filter coefficient for removing postcursor-ISI, thereby implementing a relatively expanded equalization range and effectively removing ISI without increase of operation quantity in a channel having long time delay. Equalization filters(121,122) have main taps whose positions are varied when filter coefficients for removing precursor-ISI and postcursor-ISI of an input signal including practical information are set on a basis of an inputted training sequence. A tap position control unit(130) controls the positions of the main taps. A filter coefficient storage unit(150) stores the filter coefficients outputted from the equalization filters. A signal output unit multiplies the input signal including the practical information by the filter coefficients stored in the filter coefficient storage unit, and thereby compensates distortion of the input signal.