An equalizer comprises: an FIR; a trellis decoder coupled to the FIR; a mapper coupled to the trellis decoder; and a decision feedback equalizer coupled to the mapper. The decision feedback equalizer receives the mapped and scaled output of the trellis decoder as input and an error signal is generated...http://www.google.de/patents/US20020191716?utm_source=gb-gplus-sharePatent US20020191716 - Error generation for adaptive equalizer
