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dc.contributor.authorIoannou, I.en
dc.contributor.authorCharalambous, Charalambos D.en
dc.contributor.authorDenic, S.en
dc.creatorIoannou, I.en
dc.creatorCharalambous, Charalambos D.en
dc.creatorDenic, S.en
dc.date.accessioned2019-04-08T07:46:19Z
dc.date.available2019-04-08T07:46:19Z
dc.date.issued2011
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/43711
dc.description.abstractThe paper introduces a new asymptotic series expansion for the mutual information of multiple-input multiple-output (MIMO) channels. The expansion approaches mutual information from below, and for low signal to noise ratio (SNR) first and second order terms give a tight lower bound. The low SNR approximation is used to derive a new water-filling power allocation at the transmitter for the case when the receiver and the transmitter have perfect channel state information. The low SNR approximation is also compared against existing approximations, while the new water-filling policy is related to minimum mean square decoding subject to power constraint. © 2010 IEEE.en
dc.sourceIEEE Communications Lettersen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-79952709043&doi=10.1109%2fLCOMM.2011.012511.102277&partnerID=40&md5=ad42bb7e27e4ec242c09b0022872a463
dc.subjectCommunication channels (information theory)en
dc.subjectTransmittersen
dc.subjectMimo systemsen
dc.subjectMutual informationsen
dc.subjectWaterfillingen
dc.subjectLower boundsen
dc.subjectMultiple-input multiple-output channelsen
dc.subjectSignal to noise ratioen
dc.subjectAsymptotic series expansionsen
dc.subjectChannel capacityen
dc.subjectExpansionen
dc.subjectLow signal-to-noise ratioen
dc.subjectLow snren
dc.subjectMinimum mean squaresen
dc.subjectMutual information expansionen
dc.subjectPerfect channel state informationen
dc.subjectPower allocationsen
dc.subjectPower constraintsen
dc.subjectSecond ordersen
dc.titleMutual information expansion for MIMO systems and capacity formulae at low SNRen
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.1109/LCOMM.2011.012511.102277
dc.description.volume15
dc.description.issue3
dc.description.startingpage329
dc.description.endingpage331
dc.author.facultyΠολυτεχνική Σχολή / Faculty of Engineering
dc.author.departmentΤμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών / Department of Electrical and Computer Engineering
dc.type.uhtypeArticleen
dc.source.abbreviationIEEE Commun Letten
dc.contributor.orcidCharalambous, Charalambos D. [0000-0002-2168-0231]
dc.gnosis.orcid0000-0002-2168-0231


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