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Characterization of Subscriber Local Loop by Measures and Analysis of Frequency and Impulse Responses

  • JCW Costa
  • Jacklyn Reis
  • Igor Negrão
  • Agostinho Castro
  • Lamartine Souza
  • Klas Ericson
  • Fredrik Lindqvist
  • Jaume Rius i Riu (Ph.D.)
Publiceringsår: 2006
Språk: Engelska
Publikation/Tidskrift/Serie: Proceedings of SPIE, the International Society for Optical Engineering
Volym: 6390
Dokumenttyp: Konferensbidrag
Förlag: SPIE--The International Society for Optical Engineering


This paper presents methodologies that could be used for characterizing subscriber telephone loops that carry DSL services (ADSL and ADSL2+), by determination and analysis of frequency response, time domain reflectometry, and impulse response of the line. From this analysis, the subscriber loop length, identification and location of impairments such as bridged taps, gauge changes, and open ended termination across the line are carried out. To verify the methodologies presented, results obtained from measurements are drawn and compared to results obtained from computational simulations.



  • Electrical Engineering, Electronic Engineering, Information Engineering


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