Power Optimization in Device to Device Communications Underlying 5G Cellular Networks

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dc.contributor.authorWang, Qianchun
dc.contributor.authorShen, Xiaobo
dc.coverage.issue1cs
dc.coverage.volume31cs
dc.date.accessioned2022-04-29T07:44:21Z
dc.date.available2022-04-29T07:44:21Z
dc.date.issued2022-04cs
dc.description.abstractThis paper investigates consumed power minimization and robust beamforming designs in the base station (BTS) in Device to Device (D2D) communications underlying the 5G cellular network. It is supposed that BTS is not aware of the channel state information (CSI), and only an approximation of their covariance is available. Therefore, based on the estimation error of CSI covariance matrices two optimization models are presented to minimize the power consumption and robust beamforming designs. The first model assumes that the upper bound of the estimation errors is limited to their Frobenius norms. So, the main objective of the first model is to calculate the beamforming at the BTS in such a way that the power consumption of the base station is minimized under the constraint that the SINR (signal-to-interference plus noise ratio) of all cellular users is guaranteed to be above a specified predetermined threshold. The second model considers the statistical distribution of the estimation error is known, and a probabilistic model is considered for the uncertainty of CSI covariance matrices. In this sense, the power consumption of the BTS is minimized in such a way that the non-outage probabilities of users are guaranteed to be above a certain predefined threshold. Although these optimization problems are non-convex, it is shown that they can be reformulated to a convex form using a semi-definite relaxation technique to obtain their lower bounds. The simulation results verify that the proposed methods perform much better than the Hybrid MRT-ZF, ZFBF and MRT beamforming methods.en
dc.formattextcs
dc.format.extent94-103cs
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRadioengineering. 2022 vol. 31, č. 1, s. 94-103. ISSN 1210-2512cs
dc.identifier.doi10.13164/re.2022.0094en
dc.identifier.issn1210-2512
dc.identifier.urihttp://hdl.handle.net/11012/204137
dc.language.isoencs
dc.publisherSpolečnost pro radioelektronické inženýrstvícs
dc.relation.ispartofRadioengineeringcs
dc.relation.urihttps://www.radioeng.cz/fulltexts/2022/22_01_0094_0103.pdfcs
dc.rightsCreative Commons Attribution 4.0 International licenseen
dc.rights.accessopenAccessen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subject5G cellular networksen
dc.subjectDevice to Device communicationsen
dc.subjectpower optimizationen
dc.titlePower Optimization in Device to Device Communications Underlying 5G Cellular Networksen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.affiliatedInstitution.facultyFakulta eletrotechniky a komunikačních technologiícs
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