An SNR-assisted crosstalk channel estimation technique

Authors:
J. Louveaux;A. Kalakech;M. Guenach;J. Maes;M. Peeters;L. Vandendorpe
Affiliations:
Université catholique de Louvain, Louvain-la-Neuve, Belgium;Université catholique de Louvain, Louvain-la-Neuve, Belgium;Alcatel-Lucent Bell Labs Fixed Access, Antwerp, Belgium;Alcatel-Lucent Bell Labs Fixed Access, Antwerp, Belgium;Alcatel-Lucent Bell Labs Fixed Access, Antwerp, Belgium;Université catholique de Louvain, Louvain-la-Neuve, Belgium
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

Citing 2
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Error sign feedback as an alternative to pilots for the tracking of fext transfer functions in downstream VDSL

EURASIP Journal on Applied Signal Processing
Vectored transmission for digital subscriber line systems

IEEE Journal on Selected Areas in Communications

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Abstract

In this paper, we present a new method to estimate the crosstalk channels in VDSL systems, allowing to implement well-known pre-compensation schemes. As opposed to previously presented methods, this estimation only requires minimal changes to the current standard and equipments. It is based on the concept of adding small, controlled, perturbations to the transmitted signal and observing the related changes to the SNR at the receiver. It is shown in this paper that, based on a limited amount of SNR measurements from the receivers, it is possible to accurately estimate the crosstalk channels, both in amplitude and phase.