Coefficient update circuit, adaptive equalizer including the same, and coefficient update method of the adaptive equalizer

摘要

coefficient updating circuit , comprising the adaptive equalizer , and the coefficient updating method of adaptive equalizer is provided . Coefficient of the adaptive equalizer circuit , and the error level detector adapted for detecting the level value of the difference between the error signal of the desired signal level and the output signal of the equalizer , the level value and the input signal of the adaptive equalizer of the error signal and by adding the updated value for the level value of a predetermined delay time by a delay of the input signals specified in the previous filter coefficient values provided by the current filter coefficient values for each updated coefficient generation units , adaptive equalization filter coefficients are also included in is provided to the filter . Is coefficient of the adaptive equalizer circuit can enhance the coefficient update speed can update the filter coefficient properly even when the changes are large delay of the input signal and the error signal .