DSL transmission system with far-end crosstalk cancellation

Details DSL transmission system with far-end crosstalk cancellation DSL transmission system with far-end crosstalk cancellation

2006-01-17

2006-01-17

Bayard, Emmanuel (Department: 2631)

Pulse or digital communications

Transceivers

Transmission interface between two stations or terminals

C375S222000

Reexamination Certificate

active

06987800

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 receiving discrete multitone symbols from corresponding network termination modems over a plurality of transmission channels. The invention estimates the modulated data actually transmitted by the network termination modems from the frequency components of the discrete multitone symbols received by the line termination modems and to evaluate the far-end crosstalk as a linear combination of these estimates. Far-end crosstalk cancellation for all the line termination modems is also provided in a centralized manner.

REFERENCES:
patent: 5181198 (1993-01-01), Lechleider
patent: 5271037 (1993-12-01), Szechenyi
patent: 5511119 (1996-04-01), Lechleider
patent: 5887032 (1999-03-01), Cioffi
patent: 6049607 (2000-04-01), Marash et al.
patent: 6148024 (2000-11-01), Ho et al.
patent: 6400781 (2002-06-01), Vandendorpe et al.
patent: 6628738 (2003-09-01), Peeters et al.
patent: 6744821 (2004-06-01), Van Acker et al.
patent: WO 97/06619 (1997-02-01), None
European Search Report from European application No. 99410173.1, filed Dec. 14, 1999.

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