A multi-carrier transmission system, for example a DMT system. Channel information is transmitted between two transceivers using a plurality of subcarriers. Each subcarrier, or symbol, has a parameter associated with it. The transceivers are adapted to transmit the channel information as a sequence of...http://www.google.com/patents/US6366554?utm_source=gb-gplus-sharePatent US6366554 - Multi-carrier transmission systems