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dc.contributor.authorEdemen, Çağatay
dc.contributor.authorKaya, O.
dc.date.accessioned2016-06-30T12:33:32Z
dc.date.available2016-06-30T12:33:32Z
dc.date.issued2014-11
dc.identifier.issn1089-7798
dc.identifier.urihttp://hdl.handle.net/10679/4200
dc.identifier.urihttp://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6911948&tag=1
dc.descriptionDue to copyright restrictions, the access to the full text of this article is only available via subscription.
dc.description.abstractWe consider a three-user fading cognitive cooperative multiple access channel (MAC) with one primary and two secondary transmitters. We propose two encoding/decoding strategies with varying levels of cooperation, based on block Markov superposition encoding and backward decoding. The first is an overlay model, where the secondary users (SUs) aid the transmission of the primary user (PU) by causally decoding the PU message and forwarding it while also cooperating among each other. The second is an underlay model, where the SUs cooperate by decoding and forwarding each other's messages while treating the signal received from the PU as noise. In either case, the PU is guaranteed to operate at its maximum achievable single user rate. We characterize the achievable SU rate region for both models and maximize this region as a function of the transmit powers. The simulation results show that the SU rate region can be significantly enlarged, particularly using the overlay model.
dc.language.isoengen_US
dc.publisherIEEE
dc.relation.ispartofIEEE Communications Letters
dc.rightsrestrictedAccess
dc.titleCognitive cooperative MAC with one primary and two secondary users: Achievable rates and optimal power controlen_US
dc.typeArticleen_US
dc.peerreviewedyes
dc.publicationstatuspublisheden_US
dc.contributor.departmentÖzyeğin University
dc.contributor.authorID(ORCID & YÖK ID 192293) Edemen, Çağatay
dc.contributor.ozuauthorEdemen, Çağatay
dc.identifier.volume18
dc.identifier.issue11
dc.identifier.startpage1895
dc.identifier.endpage1898
dc.identifier.wosWOS:000345069700007
dc.identifier.doi10.1109/LCOMM.2014.2360519
dc.identifier.scopusSCOPUS:2-s2.0-84910129641
dc.contributor.authorMale1
dc.relation.publicationcategoryArticle - International Refereed Journal - Institutional Academic Staff


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