Effect of power and rate adaptation on the spectral efficiency of MQAM/OFDM system under very fast fading channels

dc.contributor.authorPanayırcı, Erdal
dc.contributor.authorFan, Pingzhi
dc.contributor.authorPanayırcı, Erdal
dc.contributor.authorMathiopoulos, P. Takis
dc.date.accessioned2019-06-27T08:04:15Z
dc.date.available2019-06-27T08:04:15Z
dc.date.issued2012
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.description.abstractIn this article the effect of power and rate adaptation on the spectral efficiency of orthogonal frequency division multiplexing (OFDM) systems using M-ary quadrature amplitude modulation (MQAM) is investigated in the presence of frequency selective and very rapidly time-varying fading channels under power and instantaneous bit error rate (BER) constraints. Lower bounds on the maximum spectral efficiency of adaptive OFDM/MQAM systems with perfect and imperfect channel state information (CSI) are obtained together with a closed-form expression for the average spectral efficiency of adaptive OFDM systems. The delay between the channel estimation and the actual transmission is also considered in this article. The theoretical and numerical results show that the adaptive MQAM/OFDM systems under fast fading channels have substantial gains in spectral efficiency over the non-adaptive counterparts with perfect CSI or moderate imperfect CSI. The theoretical and numerical results also show that a good way to deal with the delay CSI under very rapidly time-varying channels is to increase the subcarrier bandwidth of the OFDM system while ignoring the impact of the cyclic prefix.en_US]
dc.identifier.citation13
dc.identifier.doi10.1186/1687-1499-2012-208en_US
dc.identifier.issn1687-1499en_US
dc.identifier.issn1687-1499
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://hdl.handle.net/20.500.12469/913
dc.identifier.urihttps://doi.org/10.1186/1687-1499-2012-208
dc.identifier.wosWOS:000316013900001en_US
dc.identifier.wosqualityN/A
dc.institutionauthorPanayirci, Erdalen_US
dc.language.isoenen_US
dc.publisherSpringer International Publishing Agen_US
dc.relation.journalEURASIP Journal on Wireless Communications and Networkingen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectOFDMen_US
dc.subjectIntercarrier interference (ICI)en_US
dc.subjectPower and rate adaptationen_US
dc.subjectSpectral efficiencyen_US
dc.subjectHigh mobilityen_US
dc.titleEffect of power and rate adaptation on the spectral efficiency of MQAM/OFDM system under very fast fading channelsen_US
dc.typeArticleen_US
dspace.entity.typePublication
relation.isAuthorOfPublication5371ab5d-9cd9-4d1f-8681-a65b3d5d6add
relation.isAuthorOfPublication.latestForDiscovery5371ab5d-9cd9-4d1f-8681-a65b3d5d6add

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