Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/10766
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dc.contributor.authorEnqvist, A.-
dc.contributor.authorDemir, O.T.-
dc.contributor.authorCavdar, C.-
dc.contributor.authorBjornson, E.-
dc.date.accessioned2023-10-24T07:03:34Z-
dc.date.available2023-10-24T07:03:34Z-
dc.date.issued2023-
dc.identifier.issn1536-1276-
dc.identifier.urihttps://doi.org/10.1109/TWC.2023.3307605-
dc.identifier.urihttps://hdl.handle.net/20.500.11851/10766-
dc.description.abstractThis paper examines how to minimize the energy consumption of a user equipment (UE) when transmitting short data payloads. The receiving base station (BS) controls a reconfigurable intelligent surface (RIS), which requires additional pilot signals to be configured, to improve the channel conditions. The challenge is that the pilot signals increase the energy consumption and must be balanced against energy savings during data transmission. We derive a formula for the energy consumption, including both pilot and data transmission powers and the effects of imperfect channel state information and discrete phase-shifts. To shorten the pilot length, we propose dividing the RIS into subarrays of multiple elements using the same reflection coefficient. The pilot power and subarray size are tuned to the payload length to minimize the energy consumption. Analytical results show that there exists a unique energy-minimizing solution. For small payloads and when the direct path loss between the BS and UE is weak compared to the path loss via the RIS, the solution is using subarrays with many elements and low pilot power and vice versa. The optimal percentage of energy spent on pilot signaling is in the order of 10-40%. IEEEen_US
dc.language.isoenen_US
dc.publisherInstitute of Electrical and Electronics Engineers Inc.en_US
dc.relation.ispartofIEEE Transactions on Wireless Communicationsen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subject6Gen_US
dc.subjectArray signal processingen_US
dc.subjectdiscrete phase-shiftsen_US
dc.subjectEnergy consumptionen_US
dc.subjectenergy efficiencyen_US
dc.subjectFinite element analysisen_US
dc.subjectOptimizationen_US
dc.subjectPayloadsen_US
dc.subjectphase-shift optimizationen_US
dc.subjectReconfigurable intelligent surfaceen_US
dc.subjectSignal to noise ratioen_US
dc.subjectsubarraysen_US
dc.subjectWireless communicationen_US
dc.subjectArray processingen_US
dc.subjectChannel state informationen_US
dc.subjectData transferen_US
dc.subjectEnergy utilizationen_US
dc.subjectFinite element methoden_US
dc.subjectSignal to noise ratioen_US
dc.subject6gen_US
dc.subjectArray signal processingen_US
dc.subjectDiscrete phaseen_US
dc.subjectDiscrete phase-shiften_US
dc.subjectEnergy-consumptionen_US
dc.subjectFinite element analyseen_US
dc.subjectOptimisationsen_US
dc.subjectPayloaden_US
dc.subjectPhase-shift optimizationen_US
dc.subjectReconfigurableen_US
dc.subjectReconfigurable intelligent surfaceen_US
dc.subjectSubarrayen_US
dc.subjectWireless communicationsen_US
dc.subjectEnergy efficiencyen_US
dc.titleOptimizing Reconfigurable Intelligent Surfaces for Short Transmissions: How Detailed Configurations can be Afforded?en_US
dc.typeArticleen_US
dc.departmentTOBB ETÜen_US
dc.identifier.startpage1en_US
dc.identifier.endpage1en_US
dc.identifier.scopus2-s2.0-85170544830en_US
dc.institutionauthor-
dc.identifier.doi10.1109/TWC.2023.3307605-
dc.authorscopusid57874684800-
dc.authorscopusid55807906700-
dc.authorscopusid24178594900-
dc.authorscopusid24478602800-
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.scopusqualityQ1-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeArticle-
item.fulltextNo Fulltext-
item.grantfulltextnone-
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
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