A method of updating tap coefficients of a channel equalizer and a channel equalizer using a variable adaptive constant

摘要

1. The technical field to which the invention described in the claims belongs;HDTV channel equalizer;2. Technical challenges to be solved by the invention;The adaptive constant adjusting the tap coefficient of the filter in the channel equalizer of the conventional HDTV is fixed to an arbitrary value, so that the convergence of the adaptive filter is degraded according to the change of the channel environment.;3. Invention is the point of the solution;(N (n)) input to the encoding channel equalizer of the error signal e (n) obtained by using the field sync signal extracted from the data input to the channel equalizer, And the tap coefficients corresponding to the channel environment are maintained by varying the constants.;4. Important Uses of the Invention;This is applied to adjust the tap coefficient of the adaptive filter included in the channel equalizer of the HDTV.