Patent ID: 6947497
Filing Date: 2005-09-20
Classification: H04L

Abstract:
1. A digital signal receiver, comprising: an equalizing unit which operates by a self-recovering equalization algorithm in an initial stage and by a decision directed equalization algorithm after a predetermined time has lapsed, for compensating for an amplitude distortion of a received signal; an original signal decision unit for deciding an original signal from a signal which is compensated for the amplitude distortion; a carrier recovering and phase lock detecting unit which operates after the predetermined time has lapsed, for detecting a phase error between an input of the original signal decision unit and the decided original signal, and outputting a phase lock signal when the phase is captured by the phase error; a re-rotator unit for restoring the signal from the original signal decision unit to its original state by the phase compensated by the carrier recovering and phase lock detecting unit and outputting a restored signal to the equalizing unit; and a coefficients updating unit for receiving the phase lock signal from the carrier recovering and phase lock detecting unit and the restored signal from the re-rotator unit, generating an error for updating coefficients of the equalizing unit, and updating the coefficients of the equalizing unit.