Multi-carrier transmission systems
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United States of America Patent
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Apr 2, 2002
Grant Date -
N/A
app pub date -
Jun 1, 1999
filing date -
Sep 2, 1996
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Abstract
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 n groups in which each of the n groups contains information concerning the number of adjacent subcarriers which have the same value as the parameter, together with the actual value of the parameter. The parameter which may have a plurality of discrete values, may be a bit-loading value, or a QAM constellation identifier.
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