GSVD-based uplink channel diagonalization in OTFS for multi-user systems

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dc.contributor.authorAghda, O.
dc.contributor.authorBelkacem, O.
dc.contributor.authorGuerreiro, J.
dc.contributor.authorSouto, N.
dc.contributor.authorSzczachor, M.
dc.contributor.authorDinis, R.
dc.contributor.editorOmetov, Aleksandr
dc.contributor.editorNurmi, Jari
dc.contributor.editorLohan, Elena Simona
dc.contributor.editorBenedetto,Francesco
dc.date.accessioned2026-09-04T09:10:10Z
dc.date.issued2025
dc.date.updated2026-09-04T10:09:31Z
dc.description.abstractThis paper introduces a multi-user uplink system, utilizing the orthogonal time frequency space (OTFS) modulation scheme. The proposed design employs the generalized singular value decomposition (GSVD) of the channels connecting the base station and the two users. Precoding and detection matrices are constructed using the right and left singular vectors, respectively. Analytical expressions are derived for a practical antenna configuration, and corresponding simulation results are presented. Simulation results for uncoded, coded, and coded scenarios with channel estimation errors reveal that the proposed GSVD-based approach outperforms MMSE equalization in certain antenna configurations. Notably, GSVD shows advantages under channel estimation error in the coded scenario.eng
dc.event.date2025
dc.event.locationRomeeng
dc.event.title2025 Work-in-Progress in Hardware and Software for Location Computation, WIPHAL 2025
dc.event.typeConferênciapt
dc.identifier.citationAghda, O., Belkacem, O., Guerreiro, J., Souto, N., Szczachor, M. & Dinis, R. (2025). GSVD-based uplink channel diagonalization in OTFS for multi-user systems. In A. Ometov, J. Nurmi, E. S. Lohan, & F. Benedetto (Eds.), CEUR Workshop Proceedings. CEUR-WS. https://hdl.handle.net/10071/38410
dc.identifier.issn1613-0073
dc.identifier.urihttps://hdl.handle.net/10071/38410
dc.language.isoeng
dc.peerreviewedyes
dc.publisherCEUR-WS
dc.relation101109435
dc.relationUID/50008/2025
dc.relationAHYA/6G HORIZON-MSCA-2022-PF-01
dc.relationORIZON-MSCA2022-DN-01
dc.relation101119643
dc.relation.ispartofCEUR Workshop Proceedings
dc.rightsopenAccess
dc.subjectGSVDeng
dc.subjectMIMOeng
dc.subjectMulti-usereng
dc.subjectOTFSeng
dc.subjectPerformance evaluationeng
dc.subjectSystem designeng
dc.subject.fosDomínio/Área Científica::Ciências Naturais::Ciências da Computação e da Informaçãopor
dc.titleGSVD-based uplink channel diagonalization in OTFS for multi-user systemseng
dc.typeconferenceObject
iscte.alternateIdentifiers.scopus2-s2.0-105009087009
iscte.identifier.cienciahttps://ciencia.iscte-iul.pt/id/ci-pub-115136
iscte.subject.odsIndústria, inovação e infraestruturaspor

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