Performance evaluation of a G.dmt-compliant digital subscriber line system
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United States of America Patent
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Sep 19, 2006
Grant Date -
Aug 29, 2002
app pub date -
Dec 20, 2000
filing date -
Oct 12, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus selects forward error correction parameters in a channel having a plurality of subchannels in a multicarrier communications system. A signal-to-noise ratio representing a subset of the subchannels is determined. A number (s) of discrete multi-tone symbols in a forward-error-correction frame, a number (z) of forward-error-correction control symbols in the discrete multitone symbol associated with the signal-to-noise ratio, a number of subchannels associated with the signal-to-noise ratio, and a net coding gain for different values of s, z, signal-to-noise ratios and numbers of subchannels is stored in a table. Forward error correction parameters of the channel are selected based on the net coding gain by applying an approximation to a subset of values in the table.
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