A distortion compensating device provided in a receiver for compensating distortion which is added to a signal in a transmission path. The signal is generated in a multi-level modulator of a transmitter in which a digital signal is mapped to one of a plurality of specified signal points in a signal space...http://www.google.fr/patents/US6487261?utm_source=gb-gplus-shareBrevet US6487261 - Distortion compensating device
