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Impact of Non-Stationary Noise on xDSL Systems: an Experimental Analysis

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Author

  • Lamartine Souza
  • Diego Cardoso
  • Marcelino Silva
  • Marcos Seruffo
  • Dário Russillo
  • JWC Costa
  • Carlos Francês
  • Agostinho Castro
  • Gervásio Cavalcante
  • Jaume Rius i Riu

Summary, in English

Broadband services require data rates that can only be achieved by using relatively high spectrum frequencies. At such high frequencies, the DSL (Digital Subscriber Line) signal is more susceptible to external noise sources, such as radio frequency interference and impulsive noise. This paper aims to characterize how the impulsive noise impacts on services and applications for a broadband system using an ADSL2+ loop. The first approach was to use the impulsive noise defined in the standards G.996.1 (Test Procedures for DSL Transceivers) from ITU-T and TR-048 (ADSL Interoperability Test Plan) from DSL Forum. In this approach we have also used a HDSL (High Bit Rate DSL) and white noise disturbers on the line. The impulsive noises c1 and c2 (defined in G.996.1) are injected into the circuit at the CO (Central Office) end and CPE (Customer Premises Equipment) end of the loop simulator. Additionally, it was analyzed the spikes of noise's impact on the ADSL2+ line. In this case, pre-defined models of NEXT (Near-end crosstalk) and white noise are injected on CO and CPE side, simultaneously. Metrics like packet rate, lost packet count, bandwidth, short-term average transfer delay, and errored seconds are used to characterize the DSL loop under the noise impairments.

Publishing year

2007

Language

English

Publication/Series

Proceedings of SPIE, the International Society for Optical Engineering

Volume

6603

Document type

Conference paper

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Conference name

SPIE Optics East Broadband Access Communication Technologies

Conference date

2007-09-09 - 2007-09-12

Status

Published