DSL transmission system with far-end crosstalk compensation
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United States of America Patent
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Apr 4, 2006
Grant Date -
Jun 21, 2001
app pub date -
Dec 14, 2000
filing date -
Dec 14, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a far-end crosstalk canceling circuit for a digital subscriber line transmission system, the transmission system including a plurality of line termination modems transmitting discrete multitone symbols Si to corresponding network termination modems over n transmission channels. The invention multiplies the vector S=(Si) i=1 to n, before transmission, by a precompensation matrix M such that the matrix product H*M is diagonal, H being the transfer matrix of the plurality of downstream transmission channels defined by R=H*S where R=(Ri), i=1 to n, is the vector of the discrete multitone symbols Ri respectively received by the modems.
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