A multi-carrier transmission system such as a DMT system. Channel information is transmitted between two transceivers using a plurality of sub-carriers modulated with symbols, each of which represents a multiplicity of bits. Each of the transceivers includes a receiver and a transmitter in which a fixed...http://www.google.com/patents/US6456649?utm_source=gb-gplus-sharePatent US6456649 - Multi-carrier transmission systems
