Power control for two user cooperative OFDMA channels

Basit Öğe Kaydı
dc.authorid0000-0003-2592-3701
dc.contributor.authorBakım, İsmail Sezien_US
dc.contributor.authorKaya, Onuren_US
dc.date.accessioned2015-01-15T23:02:18Z
dc.date.available2015-01-15T23:02:18Z
dc.date.issued2013-01
dc.departmentIşık Üniversitesi, Mühendislik Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.departmentIşık University, Faculty of Engineering, Department of Electrical-Electronics Engineeringen_US
dc.description.abstractFor a two user cooperative orthogonal frequency division multiple access (OFDMA) system with full channel state information (CSI), we obtain the optimal power allocation (PA) policies which maximize the rate region achievable by a channel adaptive implementation of inter-subchannel block Markov superposition encoding (BMSE), used in conjunction with backwards decoding. We provide the optimality conditions that need to be satisfied by the powers associated with the users' codewords and derive the closed form expressions for the optimal powers. We propose two algorithms that can be used to optimize the powers to achieve any desired rate pair on the rate region boundary: a projected subgradient algorithm, and an iterative waterfilling-like algorithm based on Karush-Kuhn-Tucker (KKT) conditions for optimality, which operates one user at a time and converges much faster. We observe that, utilization of power control to take advantage of the diversity offered by the cooperative OFDMA system, not only leads to a remarkable improvement in achievable rates, but also may help determine how the subchannels have to be instantaneously allocated to various tasks in cooperation. Simulations show that the gain from power allocation is still significant even when the CSI feedback is limited.en_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationBakım, İ. S. & Kaya, O. (2013). Power control for two user cooperative OFDMA channels. IEEE Transactions on Wireless Communications, 12(1), 258-267. doi:10.1109/TWC.2012.120412.120030en_US
dc.identifier.doi10.1109/TWC.2012.120412.120030
dc.identifier.endpage267
dc.identifier.issn1536-1276
dc.identifier.issn1558-2248
dc.identifier.issue1
dc.identifier.scopus2-s2.0-84873083031
dc.identifier.scopusqualityQ1
dc.identifier.startpage258
dc.identifier.urihttps://hdl.handle.net/11729/502
dc.identifier.urihttp://dx.doi.org/10.1109/TWC.2012.120412.120030
dc.identifier.volume12
dc.identifier.wosWOS:000314178100025
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakScience Citation Index Expanded (SCI-EXPANDED)en_US
dc.institutionauthorBakım, İsmail Sezien_US
dc.institutionauthorKaya, Onuren_US
dc.institutionauthorid0000-0003-2592-3701
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherIEEE-INST Electrical Electronics Engineers Incen_US
dc.relation.ispartofIEEE Transactions on Wireless Communicationsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAchievable ratesen_US
dc.subjectBlock Markov codingen_US
dc.subjectOFDMAen_US
dc.subjectPower controlen_US
dc.subjectResource allocationen_US
dc.subjectUser cooperationen_US
dc.subjectResource-Allocationen_US
dc.subjectFading channelsen_US
dc.subjectUplinken_US
dc.subjectSubcarrieren_US
dc.subjectComplexityen_US
dc.subjectSystemsen_US
dc.titlePower control for two user cooperative OFDMA channelsen_US
dc.typeArticleen_US
dspace.entity.typePublication

Dosyalar

Orijinal paket
Listeleniyor 1 - 1 / 1
Küçük Resim Yok
İsim:
502.pdf
Boyut:
335.58 KB
Biçim:
Adobe Portable Document Format
Açıklama:
Publisher's Version
İndir

Koleksiyon

Makale Koleksiyonu | Elektrik-Elektronik Mühendisliği Bölümü
Scopus İndeksli Yayınlar Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu