Crosstalk models for short VDSL2 lines from measured 30MHz data

Authors:
E. Karipidis;N. Sidiropoulos;A. Leshem;Li Youming;R. Tarafi;M. Ouzzif
Affiliations:
Department of Electronic and Computer Engineering, Technical University of Crete, Chania, Crete, Greece;Department of Electronic and Computer Engineering, Technical University of Crete, Chania, Crete, Greece;Department of Electrical Engineering, Bar-Ilan University, Ramat-Gan, Israel;Department of Electrical Engineering, Bar-Ilan University, Ramat-Gan, Israel;France Telecom R&D, Lannion, France;France Telecom R&D, Lannion, France
Venue:
EURASIP Journal on Applied Signal Processing
Year:
2006

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Abstract

In recent years, there has been a growing interest in hybrid fiber-copper access solutions, as in fiber to the basement (FTTB) and fiber to the curb/cabinet (FTTC). The twisted pair segment in these architectures is in the range of a few hundred meters, thus supporting transmission over tens of MHz. This paper provides crosstalk models derived from measured data for quad cable, lengths between 75 and 590 meters, and frequencies up to 30 MHz. The results indicate that the log-normal statistical model (with a simple parametric law for the frequency-dependent mean) fits well up to 30 MHz for both FEXT and NEXT. This extends earlier log-normal statistical modeling and validation results for NEXT over bandwidths in the order of a few MHz. The fitted crosstalk power spectra are useful for modem design and simulation. Insertion loss, phase, and impulse response duration characteristics of the direct channels are also provided.