DECISION FEEDBACK EQUALIZER FOR EQUALIZING QAM SIGNAL

摘要

The present invention relates to a QAM signal decision feedback equalizer, the equalizer of the present invention includes a feedforward filter unit (150); A feedback filter unit 152; A subtraction unit 154; A complex multiplication unit 156; A signal discriminating unit 158; A tap coefficient calculating unit 160; And a digital phase locked loop 162. According to the present invention, the feed forward filter unit and the feedback filter unit are implemented by using a modified complex filtering algorithm, thereby reducing the number of finite shock response filters by about 1/4. Chip size in hardware can be reduced.