Pulse or digital communications – Transceivers – Modems
Reexamination Certificate
2006-04-04
2006-04-04
Bayard, Emmanuel (Department: 2638)
Pulse or digital communications
Transceivers
Modems
Reexamination Certificate
active
07023908
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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European Search Report from European Patent Application 99410173 1, filed Dec. 14, 1999.
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Bengtsson Daniel
Isson Olivier
Nordstrom Tomas
Bayard Emmanuel
Jorgenson Lisa K.
Morris James H.
STMicroelectronics NV
STMicroelectronics S.A.
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