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Crosstalk Channel Estimation via Standardized Two-Port Measurements

Abstract

The emerging multiuser transmission techniques for enabling higher data rates in the copper-access network relies upon accurate knowledge of the twisted-pair cables. In particular, the square-magnitude of the crosstalk channels between the transmission lines are of interest for crosstalk-mitigation techniques. Acquiring such information normally requires dedicated apparatus since crosstalk-channel measurement is not included in the current digital subscriber line (DSL) standards. We address this problem by presenting a standard-compliant estimator for the square-magnitude of the frequency-dependent crosstalk channels that uses only functionality existing in today's standards. The proposed estimator is evaluated by laboratory experiments with standard-compliant DSL modems and real copper access network cables. The estimation results are compared with both reference measurements and with a widely used crosstalk model. The results indicate that the proposed estimator obtains an estimate of the square-magnitude of the crosstalk channels with a mean deviation from the reference measurement less than 3 dB for most frequencies.

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Correspondence to Fredrik Lindqvist.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Lindqvist, F., Lindqvist, N., Dortschy, B. et al. Crosstalk Channel Estimation via Standardized Two-Port Measurements. EURASIP J. Adv. Signal Process. 2008, 916865 (2009). https://doi.org/10.1155/2008/916865

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Keywords

  • Transmission Line
  • Channel Estimation
  • Access Network
  • High Data Rate
  • Reference Measurement