In-home PLC to DSL Interference Characterization and Mitigation

It is often advocated that a solution to the problem of mutual interference between digital subscriber line (DSL) networks and in-home power line communications (PLC) networks is to prevent the PLC networks from utilizing the DSL spectrum. However, this solution will render PLC networks inoperable with the introduction of wide-band DSL technologies like G.fast. As an alternative solution, this thesis proposes to use the common mode (CM) signal, which contains information about the electromagnetic interference (EMI), to estimate and subtract the differential mode (DM) PLC-to-DSL interference from the DM DSL signal. Since the PLC-to-DSL interference environment within a residential setting has neither been characterized via measurements nor by a model, a measurement campaign is conducted. A set of 480 measurements are collected, within two residential test-sites, to characterize the PLC-to-DSL interference environment for two DSL modem installation scenarios. This campaign shows that the PLC-to-DSL interference channels are frequency selective and vary significantly from room to room within the house. Two interference mitigation solutions are proposed in this thesis. The first solution relies on scheduling the PLC channel access; while, the second solution pre-multiplies the PLC symbol by the inverse of the DM cross-coupling channel before transmission. Both solutions utilize adaptive frequency domain interference cancellers (FDICs) that are insensitive to the non-stationarity of the PLC channel and the frequency selectivity of the coupling channels. The performances of the proposed solutions are evaluated, and their effectiveness in mitigating the PLC-to-DSL wide-band EMI is demonstrated using analysis that incorporates the measured PLC-to-DSL coupling channels.

Name thesis:degree_name

Doctor of Philosophy (PhD)

Discipline thesis:degree_discipline

Electrical and Computer Engineering

Grantor dc:publisher.institution

Graduate Studies

Year dc:date.issued

2015

Author dc:creator

• Ali, Khaled

Advisors dc:contributor.advisor

• Messier, Geoffrey
• Lai, Stephen

• Engineering--Electronics and Electrical

Statement dc:rights

• University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.

Language dc:language.iso

eng

DOI

http://dx.doi.org/10.11575/PRISM/26533

OAI identifier oai:identifier

oai:ucalgary.scholaris.ca:11023/2025