A Unified Approach for Beam-Split Mitigation in Terahertz Wideband Hybrid Beamforming

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dc.authoridElbir, Ahmet M./0000-0003-4060-3781en_US
dc.authoridElbir, Ahmet M./0000-0003-4060-3781en_US
dc.authorscopusid55362509900en_US
dc.authorwosidElbir, Ahmet M./Q-1265-2015en_US
dc.authorwosidElbir, Ahmet M./X-3731-2019en_US
dc.contributor.authorElbir, Ahmet M.
dc.date.accessioned2024-08-23T16:04:16Z
dc.date.available2024-08-23T16:04:16Z
dc.date.issued2023en_US
dc.departmentDüzce Üniversitesien_US
dc.description.abstractThe sixth generation networks envision the deployment of terahertz (THz) band as one of the key enabling property thanks to its abundant bandwidth. However, the ultra-wide bandwidth in THz causes beam-split phenomenon due to the use of a single analog beamformer (AB). Specifically, beam-split makes different subcarriers to observe distinct directions since the same AB is adopted for all subcarriers. Previous works mostly employ additional hardware components, e.g., time-delayer networks to mitigate beam-split by realizing virtual subcarrier-dependent ABs. This article introduces an efficient and unified approach, called beam-split-aware (BSA) hybrid beamforming. In particular, instead of virtually generating subcarrier-dependent ABs, a single AB is used and the effect of beam-split is computed and passed into the digital beamformers, which are subcarrier-dependent while maximizing spectral efficiency. Hence, the proposed BSA approach effectively mitigates the impact of beam-split and it can be applied to any hybrid beamforming architecture. Manifold optimization and orthogonal matching pursuit techniques are considered for the evaluation of the proposed approach in multi-user scenario. Numerical simulations show that significant performance improvement can be achieved as compared to the conventional techniques.en_US
dc.identifier.doi10.1109/TVT.2023.3265395
dc.identifier.endpage12360en_US
dc.identifier.issn0018-9545
dc.identifier.issn1939-9359
dc.identifier.issue9en_US
dc.identifier.scopus2-s2.0-85153353469en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage12355en_US
dc.identifier.urihttps://doi.org/10.1109/TVT.2023.3265395
dc.identifier.urihttps://hdl.handle.net/20.500.12684/14136
dc.identifier.volume72en_US
dc.identifier.wosWOS:001103676800100en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorElbir, Ahmet M.en_US
dc.language.isoenen_US
dc.publisherIeee-Inst Electrical Electronics Engineers Incen_US
dc.relation.ispartofIeee Transactions on Vehicular Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectTerahertzen_US
dc.subjectbeam spliten_US
dc.subjectbeam-squint hybrid beamformingen_US
dc.subjectmulti-useren_US
dc.subjectmassive MIMOen_US
dc.subjectWireless Communicationsen_US
dc.subjectChannel Estimationen_US
dc.subjectMimo Systemsen_US
dc.subjectSquinten_US
dc.titleA Unified Approach for Beam-Split Mitigation in Terahertz Wideband Hybrid Beamformingen_US
dc.typeArticleen_US

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