Digital subscriber line transmission method, apparatus and system using training

摘要

In a digital subscriber line transmission method and apparatus for alternately transmitting and receiving a DMT symbol sequence between xDSL devices by TDD-xDSL transmission, a training-symbol transmitting side adds some data contained in a DMT symbol sequence onto the beginning or end or onto both the beginning and end of the symbol sequence redundantly and transmits the sequence at the time of training carried out prior to normal communication. A receiving side of the training symbol sequence performs training upon removing redundant data that has been added onto the beginning and end of the symbol sequence.