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Conference Paper: Variable rate adaptive trellis coded QAM for high bandwidthefficiency applications in Rayleigh fading channels

TitleVariable rate adaptive trellis coded QAM for high bandwidthefficiency applications in Rayleigh fading channels
Authors
KeywordsTransportation
Automobiles
Issue Date1998
PublisherIEEE.
Citation
Proceedings of the 48th IEEE Vehicular Technology Conference, Ottawa, Ontario, Canada, 18-21 May 1998, v. 1, p. 348-352 How to Cite?
AbstractA high bandwidth efficiency variable rate adaptive channel coding scheme, ATCQAM, is proposed. Known pilot symbols are transmitted periodically to aid demodulation. Past channel states are fed back to the transmitter with delay. Current channel state is then predicted at the transmitter to decide on the appropriate modulation mode for the current symbol. At good channel states, high level modulation is used to boost up the average throughput. At bad channel states, low level modulation is used to increase error protection. By matching the variable modulation level with a variable rate channel coder, the physical bandwidth is maintained constant. Design issues for the ATCQAM are considered. The effects of finite feedback delay, finite interleaving depth and mobile speed are investigated.
Persistent Identifierhttp://hdl.handle.net/10722/54050
ISSN

 

DC FieldValueLanguage
dc.contributor.authorLau, KNen_HK
dc.contributor.authorMacleod, MDen_HK
dc.date.accessioned2009-04-03T07:35:27Z-
dc.date.available2009-04-03T07:35:27Z-
dc.date.issued1998en_HK
dc.identifier.citationProceedings of the 48th IEEE Vehicular Technology Conference, Ottawa, Ontario, Canada, 18-21 May 1998, v. 1, p. 348-352en_HK
dc.identifier.issn1550-2252en_HK
dc.identifier.urihttp://hdl.handle.net/10722/54050-
dc.description.abstractA high bandwidth efficiency variable rate adaptive channel coding scheme, ATCQAM, is proposed. Known pilot symbols are transmitted periodically to aid demodulation. Past channel states are fed back to the transmitter with delay. Current channel state is then predicted at the transmitter to decide on the appropriate modulation mode for the current symbol. At good channel states, high level modulation is used to boost up the average throughput. At bad channel states, low level modulation is used to increase error protection. By matching the variable modulation level with a variable rate channel coder, the physical bandwidth is maintained constant. Design issues for the ATCQAM are considered. The effects of finite feedback delay, finite interleaving depth and mobile speed are investigated.en_HK
dc.languageengen_HK
dc.publisherIEEE.en_HK
dc.rights©1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectTransportationen_HK
dc.subjectAutomobilesen_HK
dc.titleVariable rate adaptive trellis coded QAM for high bandwidthefficiency applications in Rayleigh fading channelsen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1550-2252&volume=1&spage=348&epage=352&date=1998&atitle=Variable+rate+adaptive+trellis+coded+QAM+for+high+bandwidthefficiency+applications+in+Rayleigh+fading+channelsen_HK
dc.identifier.emailLau, KN: knlau@ieee.orgen_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1109/VETEC.1998.686593en_HK
dc.identifier.hkuros45233-

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