{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/80751"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/80751","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"New Techniques for Multicarrier Communication Systems","abstract":"Common to all OFDM systems is a large peak-to-average-power ratio (PAR) problem, which can lead to low power efficiency and nonlinear distortion at the transmit power amplifier. Tone reservation uses unavailable or reserved tones to design a peak-cancelling signal that lowers the PAR of a transmit OFDM block. Active-set methods provide a fast-converging PAR reduction technique that can be applied to real- and complex-baseband OFDM systems. In systems where data tones cannot be sacrificed, PAR reduction can be obtained using active (data-carrying) subchannels where outer constellation points are dynamically moved, within margin-preserving constraints, to reduce the peak magnitude. This scheme, known as active constellation extension (ACE), simultaneously decreases the bit error rate slightly while substantially reducing the peak magnitude.","abstract_html":"Common to all OFDM systems is a large peak-to-average-power ratio (PAR) problem, which can lead to low power efficiency and nonlinear distortion at the transmit power amplifier. Tone reservation uses unavailable or reserved tones to design a peak-cancelling signal that lowers the PAR of a transmit OFDM block. Active-set methods provide a fast-converging PAR reduction technique that can be applied to real- and complex-baseband OFDM systems. In systems where data tones cannot be sacrificed, PAR reduction can be obtained using active (data-carrying) subchannels where outer constellation points are dynamically moved, within margin-preserving constraints, to reduce the peak magnitude. This scheme, known as active constellation extension (ACE), simultaneously decreases the bit error rate slightly while substantially reducing the peak magnitude.","abstract_has_math":false,"creators":["Krongold, Brian Scott"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical Engineering","degree_department":null,"school":null,"contributors":["Jones, Douglas L."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T20:07:59Z","date_published":"2015-09-25T20:07:59Z","updated_at":"2026-07-22T22:26:14Z","subjects":["Engineering, Electronics and Electrical"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3030449"],"render_values":[{"text":"(MiAaPQ)AAI3030449","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/80751","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Jones, Douglas L."]},{"key":"dc:creator","label":"Author","values":["Krongold, Brian Scott"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T20:07:59Z","10000-01-01","2001"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Electronics and Electrical"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/80751","(MiAaPQ)AAI3030449"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Common to all OFDM systems is a large peak-to-average-power ratio (PAR) problem, which can lead to low power efficiency and nonlinear distortion at the transmit power amplifier. Tone reservation uses unavailable or reserved tones to design a peak-cancelling signal that lowers the PAR of a transmit OFDM block. Active-set methods provide a fast-converging PAR reduction technique that can be applied to real- and complex-baseband OFDM systems. In systems where data tones cannot be sacrificed, PAR reduction can be obtained using active (data-carrying) subchannels where outer constellation points are dynamically moved, within margin-preserving constraints, to reduce the peak magnitude. This scheme, known as active constellation extension (ACE), simultaneously decreases the bit error rate slightly while substantially reducing the peak magnitude.","Made available in DSpace on 2015-09-25T20:07:59Z (GMT). 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Tone reservation uses unavailable or reserved tones to design a peak-cancelling signal that lowers the PAR of a transmit OFDM block. Active-set methods provide a fast-converging PAR reduction technique that can be applied to real- and complex-baseband OFDM systems. In systems where data tones cannot be sacrificed, PAR reduction can be obtained using active (data-carrying) subchannels where outer constellation points are dynamically moved, within margin-preserving constraints, to reduce the peak magnitude. This scheme, known as active constellation extension (ACE), simultaneously decreases the bit error rate slightly while substantially reducing the peak magnitude.","Made available in DSpace on 2015-09-25T20:07:59Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3030449.pdf: 8236301 bytes, checksum: 13d191985323a3078078c49f13311ff8 (MD5) Previous issue date: 2001","Embargo set by: Seth Robbins for item 82033 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","168 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2001."],"dc:identifier":["http://hdl.handle.net/2142/80751","(MiAaPQ)AAI3030449"],"dc:language":["eng"],"dc:subject":["Engineering, Electronics and Electrical"],"dc:title":["New Techniques for Multicarrier Communication Systems"],"dc:type":["text"],"thesis:degree_discipline":["Electrical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:14Z"}