Rate-constrained Relaying: A Model for Cooperation with Limited Relay Resources

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dc.citation.bibtexNamearticleen_US
dc.citation.journalTitleIEEE Transactions on Information Theoryen_US
dc.contributor.authorSabharwal, Ashutoshen_US
dc.contributor.authorMitra, Urbashien_US
dc.contributor.orgCenter for Multimedia Communications (http://cmc.rice.edu/)en_US
dc.date.accessioned2007-10-31T01:03:31Z
dc.date.available2007-10-31T01:03:31Z
dc.date.issued2005-06-01en
dc.date.modified2005-06-17en_US
dc.date.submitted2005-06-11en_US
dc.descriptionJournal Paperen_US
dc.description.abstractIn this paper, the impact of limited resources on achievable rates in relay channels is investigated. Resource limitation is modeled as a rate constraint, Rbar, which constrains the rate at which a relay can reliably <i>decode</i> or <i>source-code</i> data. With this constraint in hand, the achievable rates for several protocols are derived and compared: decode-and-forward, estimate-and-forward, a Markovian amplify-and-forward and a hybrid scheme that combines decode-and-forward and amplify-and-forward. The key result is that the relative performance of these protocols in the unconstrained case is not maintained in rate constrained scenarios. The case of severe resource limitation (Rbar --> 0) is also considered. Previously established rates for unconstrained decode-and-forward and estimate-and-forward are re-examined in the context of optimal parameters and asymptotic performance. For most relay locations (topologies), either decode-and-forward and estimate-and-forward offers superior performance. However, for severe rate constraints, amplify-and-forward generally offers the best performance.en_US
dc.identifier.citationA. Sabharwal and U. Mitra, "Rate-constrained Relaying: A Model for Cooperation with Limited Relay Resources," <i>IEEE Transactions on Information Theory,</i> 2005.
dc.identifier.urihttps://hdl.handle.net/1911/20314
dc.language.isoeng
dc.relation.projecthttp://www.ece.rice.edu/~ashuen_US
dc.subjectRelay channel*
dc.subjectcomplexity*
dc.subjectachievable rates*
dc.subjectdecode and forward*
dc.subjectestimate and forward*
dc.subjectamplify and forward*
dc.subject.keywordRelay channelen_US
dc.subject.keywordcomplexityen_US
dc.subject.keywordachievable ratesen_US
dc.subject.keyworddecode and forwarden_US
dc.subject.keywordestimate and forwarden_US
dc.subject.keywordamplify and forwarden_US
dc.titleRate-constrained Relaying: A Model for Cooperation with Limited Relay Resourcesen_US
dc.typeJournal article
dc.type.dcmiText
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