Modeling Alien-Line Impedance Mismatch in Wideband Vectored Wireline Systems

Author

Medeiros, Eduardo ; Magesacher, Thomas ; Odling, Per ; Dong Wei ; Xiang Wang ; Qiaojie Li ; Eriksson, Per-Erik ; Chenguang Lu ; Boschma, Jeroen ; van den Heuvel, Bas

Author_Institution

Dept. of Electr. & Inf. Technol., Lund Univ., Lund, Sweden

Volume

18

Issue

9

fYear

2014

fDate

Sept. 2014

Firstpage

1527

Lastpage

1530

Abstract

Sudden changes of channel coefficients in a wideband vectored wireline system (such as G.fast) due to changes in the terminating impedance of lines outside the vectored group can seriously degrade stability and throughput. This letter presents a model that predicts the impact of termination mismatch based exclusively on crosstalk data for the properly-terminated state. Experimental results confirm a tight fit between model and measurements. The model allows analysis of system performance and stability without dedicated crosstalk measurements for mismatch cases.

Keywords

broadband networks; crosstalk; digital subscriber lines; impedance matching; stability; G.fast; channel coefficients; crosstalk data; crosstalk measurements; modeling Alien-line impedance mismatch; properly-terminated state; stability; system performance analysis; wideband vectored wireline systems; Couplings; Crosstalk; Data models; Impedance; Measurement uncertainty; Signal to noise ratio; Throughput; DSL; Impedance matching; vectored transmission;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2014.2341551

Filename

6861981