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dc.contributor.authorSboui, Lokman
dc.contributor.authorRezki, Zouheir
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2021-09-05T12:56:15Z
dc.date.available2021-09-05T12:56:15Z
dc.date.issued2021-09-03
dc.identifier.citationSboui, L., Rezki, Z., & Alouini, M.-S. (2021). On the Energy Efficiency of OFDMA Cellular Networks. IEEE Transactions on Vehicular Technology, 1–1. doi:10.1109/tvt.2021.3109907
dc.identifier.issn1939-9359
dc.identifier.doi10.1109/TVT.2021.3109907
dc.identifier.urihttp://hdl.handle.net/10754/670930
dc.description.abstractIn this paper, we study the energy efficiency (EE) of orthogonal frequency-division multiple access (OFDMA) cellular networks under the 5G requirement of EE enhancement. We aim to present a power allocation scheme maximizing the EE of downlink cellular communications while avoiding numerical methods such as fractional programming. We focus on two EE forms; global EE and weighted sum EE. Therefore, we propose a novel explicit expression of the optimal power allocation related to each subcarrier. We also present the power control with limited power budget or/and minimal transmission rate constraint in both base station and subcarrier perspectives. As a result, we notice the occurrence of some transmission outage events depending on the constraints' parameters. From another side, we extend our study to analyze the effect of the channel state information (CSI) unavailability on our proposed power scheme. In the numerical results, we show that our proposed power control improves the EE, especially at high power budget regime and low minimal rate regime. We also show that having more subcarriers enhances the OFDMA EE. Finally, we show that EE degradation due to CSI unavailability is very small showing the robustness of the proposed scheme against CSI imperfectness.
dc.publisherIEEE
dc.relation.urlhttps://ieeexplore.ieee.org/document/9529074/
dc.relation.urlhttps://ieeexplore.ieee.org/document/9529074/
dc.relation.urlhttps://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9529074
dc.rights(c) 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
dc.subjectEnergy efficiency
dc.subjectOFDMA cellular networks
dc.subjectoptimal power allocation
dc.titleOn the Energy Efficiency of OFDMA Cellular Networks
dc.typeArticle
dc.contributor.departmentCommunication Theory Lab
dc.contributor.departmentComputer, Electrical and Mathematical Science and Engineering (CEMSE) Division
dc.contributor.departmentElectrical and Computer Engineering Program
dc.identifier.journalIEEE Transactions on Vehicular Technology
dc.eprint.versionPost-print
dc.contributor.institutionElectrical Engineering, Ecole de technologie superieure, 14849 Montreal, Quebec, Canada, H3C 1K3
dc.contributor.institutionECE, University of California Santa Cruz, 8787 Santa Cruz, California, United States, 95064-1077
dc.identifier.pages1-1
kaust.personAlouini, Mohamed-Slim
dc.date.published-online2021-09-03
dc.date.published-print2021-10


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