Power allocation for cooperative communications

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dc.authorid0000-0003-2592-3701
dc.contributor.authorKaya, Onuren_US
dc.contributor.authorUlukuş, Şennuren_US
dc.date.accessioned2019-08-31T12:10:23Z
dc.date.accessioned2019-08-05T16:05:01Z
dc.date.available2019-08-31T12:10:23Z
dc.date.available2019-08-05T16:05:01Z
dc.date.issued2009
dc.departmentIşık Üniversitesi, Mühendislik Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.departmentIşık University, Faculty of Engineering, Department of Electrical-Electronics Engineeringen_US
dc.description.abstractIn this chapter, we review the optimal power allocation policies for fading channels in single user and multiple access scenarios. We provide some background on cooperative communications, starting with the relay channel, and moving onto mutually cooperative systems. Then, we consider power control and user cooperation jointly, and for a fading Gaussian multiple access channel (MAC) with user cooperation, we present a channel adaptive encoding policy, which relies on block Markov superposition coding. We obtain the power allocation policies that maximize the average rates achievable by block Markov coding, subject to average power constraints. The optimal policies result in a coding scheme that is simpler than the one for a general multiple access channel with generalized feedback. This simpler coding scheme also leads to the possibility of formulating an otherwise non-concave optimization problem as a concave one. Using the perfect channel state information (CSI) available at the transmitters to adapt the powers, we demonstrate significant gains over the achievable rates for existing cooperative systems. We consider both backwards and window decoding, and show that, window decoding, which incurs less decoding delay, achieves the same sum rate as backwards decoding, when the powers are optimized.en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationKaya, O. & Ulukuş, Ş. (2010). Power Allocation for Cooperative Communications. In M. Uysal (Ed.), Cooperative Communications for Improved Wireless Network Transmission: Framework for Virtual Antenna Array Applications (pp. 62-101). Hershey, PA: IGI Global. doi:10.4018/978-1-60566-665-5.ch003en_US
dc.identifier.doi10.4018/978-1-60566-665-5.ch003
dc.identifier.endpage101
dc.identifier.isbn9781605666655
dc.identifier.scopus2-s2.0-84901524224
dc.identifier.scopusqualityN/A
dc.identifier.startpage62
dc.identifier.urihttps://hdl.handle.net/11729/1979
dc.identifier.urihttps://dx.doi.org/10.4018/978-1-60566-665-5.ch003
dc.indekslendigikaynakScopusen_US
dc.institutionauthorKaya, Onuren_US
dc.institutionauthorid0000-0003-2592-3701
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherIGI Globalen_US
dc.relation.ispartofCooperative Communications for Improved Wireless Network Transmission: Framework for Virtual Antenna Array Applicationsen_US
dc.relation.publicationcategoryKitap Bölümü - Uluslararasıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectElectric relaysen_US
dc.subjectNetwork codingen_US
dc.subjectRelay channelsen_US
dc.titlePower allocation for cooperative communicationsen_US
dc.typeBook Chapteren_US
dspace.entity.typePublication

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