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Detection and localization of load coils from one-port measurements

Lindqvist, Fredrik LU and Fertner, Antoni (2010) In IEEE Transactions on Instrumentation and Measurement 59(7). p.1972-1982
Abstract (Swedish)
Abstract in Undetermined

This paper deals with detection and localization of load coils in the copper access network. The load coil is a legacy device that must be removed before deploying broadband services on twisted-pair transmission lines. The proposed methods do not require dedicated hardware but utilize the already installed transceivers for one-port measurements of the line input impedance. The number of load coils is detected by counting the number of resonance peaks in the line impedance spectrum. An approximative model of the symmetric loaded line is presented, from which a low-complexity load coil locator is derived. For nonsymmetric lines, a load coil locator using model-based optimization is proposed. The two... (More)
Abstract in Undetermined

This paper deals with detection and localization of load coils in the copper access network. The load coil is a legacy device that must be removed before deploying broadband services on twisted-pair transmission lines. The proposed methods do not require dedicated hardware but utilize the already installed transceivers for one-port measurements of the line input impedance. The number of load coils is detected by counting the number of resonance peaks in the line impedance spectrum. An approximative model of the symmetric loaded line is presented, from which a low-complexity load coil locator is derived. For nonsymmetric lines, a load coil locator using model-based optimization is proposed. The two methods are compared and evaluated by computer simulations and by laboratory measurements on real transmission lines. The estimation results indicate that up to five load coils can be robustly detected and located with the proposed methods. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cable modeling, detection, digital subscriber line (DSL), load coil, one-port measurement, single-ended line testing (SELT)
in
IEEE Transactions on Instrumentation and Measurement
volume
59
issue
7
pages
1972 - 1982
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000281764200026
  • scopus:77953286472
ISSN
0018-9456
DOI
10.1109/TIM.2009.2028220
language
English
LU publication?
yes
id
3c1cbaab-25f0-4ad9-8f42-4bd8e05c59f7 (old id 1414737)
date added to LUP
2009-06-08 10:13:03
date last changed
2018-05-29 09:35:57
@article{3c1cbaab-25f0-4ad9-8f42-4bd8e05c59f7,
  abstract     = {<b>Abstract in Undetermined</b><br/><br>
This paper deals with detection and localization of load coils in the copper access network. The load coil is a legacy device that must be removed before deploying broadband services on twisted-pair transmission lines. The proposed methods do not require dedicated hardware but utilize the already installed transceivers for one-port measurements of the line input impedance. The number of load coils is detected by counting the number of resonance peaks in the line impedance spectrum. An approximative model of the symmetric loaded line is presented, from which a low-complexity load coil locator is derived. For nonsymmetric lines, a load coil locator using model-based optimization is proposed. The two methods are compared and evaluated by computer simulations and by laboratory measurements on real transmission lines. The estimation results indicate that up to five load coils can be robustly detected and located with the proposed methods.},
  author       = {Lindqvist, Fredrik and Fertner, Antoni},
  issn         = {0018-9456},
  keyword      = {Cable modeling,detection,digital subscriber line (DSL),load coil,one-port measurement,single-ended line testing (SELT)},
  language     = {eng},
  number       = {7},
  pages        = {1972--1982},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Instrumentation and Measurement},
  title        = {Detection and localization of load coils from one-port measurements},
  url          = {http://dx.doi.org/10.1109/TIM.2009.2028220},
  volume       = {59},
  year         = {2010},
}