{"id":{"repo_id":"vu-aus","oai_identifier":"oai:eprints.vu.edu.au:15585"},"canonical_url":"https://search.dev.ndltd.org/etd/vu-aus/oai:eprints.vu.edu.au:15585","repository":{"repo_id":"vu-aus","name":"Victoria University (Australia)","base_url":"https://vuir.vu.edu.au/cgi/oai2"},"display":{"title":"Digital power line communication on EHV power lines","abstract":"Digital modulation can be used on PLC communication links to increase system capacity. The improved noise and interference capability of digital modulation can lead to reduced guard distances between co-channel users and can more than offset the additional bandwidth requirements of digital modulation. QAM-16 is proposed as a suitable modulation scheme. In the example given this modulation leads to a modest capacity improvement of 10% when ADPCM is used for voice coding. This improves dramatically with the use of more advanced voice coders. Simulations are performed on a 500 KV line to determine the effect of reflections and modal propagation on the equalization requirements of the modem. The major distortions are caused by the applied filtering within the modem, and the reflections on the transmission path, the later are particularly evident at low carrier frequencies, and when the line lengths are short. A PLC bandlimited modem, whose frequency is user selectable within the PLC spectrum has been designed and tested. Particular emphasis is placed on the adaptive equalisation algorithm, that is selected in the modem design to combat distortions due to the imperfections of the modem and reflections on the power line. Most of the modem functions were implemented using DSP techniques.","abstract_html":"Digital modulation can be used on PLC communication links to increase system capacity. The improved noise and interference capability of digital modulation can lead to reduced guard distances between co-channel users and can more than offset the additional bandwidth requirements of digital modulation. QAM-16 is proposed as a suitable modulation scheme. In the example given this modulation leads to a modest capacity improvement of 10% when ADPCM is used for voice coding. This improves dramatically with the use of more advanced voice coders. Simulations are performed on a 500 KV line to determine the effect of reflections and modal propagation on the equalization requirements of the modem. The major distortions are caused by the applied filtering within the modem, and the reflections on the transmission path, the later are particularly evident at low carrier frequencies, and when the line lengths are short. A PLC bandlimited modem, whose frequency is user selectable within the PLC spectrum has been designed and tested. Particular emphasis is placed on the adaptive equalisation algorithm, that is selected in the modem design to combat distortions due to the imperfections of the modem and reflections on the power line. Most of the modem functions were implemented using DSP techniques.","abstract_has_math":false,"creators":["Cosic, Aleksandar J"],"institution":"Victoria University of Technology","degree_name":null,"degree_level":"rmaster","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1991,"date_issued":"1991","date_published":"1991","updated_at":"2026-07-24T06:33:15Z","subjects":["0906 Electrical and Electronic Engineering","School of Engineering and Science","1005 Communications Technologies"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Cosic, Aleksandar J"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1991"]},{"key":"dc:date.issued","label":"Date","values":["1991"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Electrical and Electronic Engineering"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["Victoria University of Technology"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://vuir.vu.edu.au/15585/"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["rmaster"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["0906 Electrical and Electronic Engineering","School of Engineering and Science","1005 Communications Technologies"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://vuir.vu.edu.au/15585/1/Cosic_1991compressed.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Digital modulation can be used on PLC communication links to increase system capacity. The improved noise and interference capability of digital modulation can lead to reduced guard distances between co-channel users and can more than offset the additional bandwidth requirements of digital modulation. QAM-16 is proposed as a suitable modulation scheme. In the example given this modulation leads to a modest capacity improvement of 10% when ADPCM is used for voice coding. This improves dramatically with the use of more advanced voice coders. Simulations are performed on a 500 KV line to determine the effect of reflections and modal propagation on the equalization requirements of the modem. The major distortions are caused by the applied filtering within the modem, and the reflections on the transmission path, the later are particularly evident at low carrier frequencies, and when the line lengths are short. A PLC bandlimited modem, whose frequency is user selectable within the PLC spectrum has been designed and tested. Particular emphasis is placed on the adaptive equalisation algorithm, that is selected in the modem design to combat distortions due to the imperfections of the modem and reflections on the power line. Most of the modem functions were implemented using DSP techniques."]},{"key":"dc:format","label":"Dc Format","values":["text"]},{"key":"dc:title","label":"Title","values":["Digital power line communication on EHV power lines"]}]}],"canonical_facts":{"dc:creator":["Cosic, Aleksandar J"],"dc:date":["1991"],"dc:date.issued":["1991"],"dc:description.abstract":["Digital modulation can be used on PLC communication links to increase system capacity. The improved noise and interference capability of digital modulation can lead to reduced guard distances between co-channel users and can more than offset the additional bandwidth requirements of digital modulation. QAM-16 is proposed as a suitable modulation scheme. In the example given this modulation leads to a modest capacity improvement of 10% when ADPCM is used for voice coding. This improves dramatically with the use of more advanced voice coders. Simulations are performed on a 500 KV line to determine the effect of reflections and modal propagation on the equalization requirements of the modem. The major distortions are caused by the applied filtering within the modem, and the reflections on the transmission path, the later are particularly evident at low carrier frequencies, and when the line lengths are short. A PLC bandlimited modem, whose frequency is user selectable within the PLC spectrum has been designed and tested. Particular emphasis is placed on the adaptive equalisation algorithm, that is selected in the modem design to combat distortions due to the imperfections of the modem and reflections on the power line. Most of the modem functions were implemented using DSP techniques."],"dc:format":["text"],"dc:identifier.uri":["https://vuir.vu.edu.au/15585/1/Cosic_1991compressed.pdf"],"dc:language":["en"],"dc:publisher.department":["Department of Electrical and Electronic Engineering"],"dc:publisher.institution":["Victoria University of Technology"],"dc:relation.isreferencedby":["https://vuir.vu.edu.au/15585/"],"dc:subject":["0906 Electrical and Electronic Engineering","School of Engineering and Science","1005 Communications Technologies"],"dc:title":["Digital power line communication on EHV power lines"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["rmaster"]},"updated_at":"2026-07-24T06:33:15Z"}