Cell-free UAV networks: asymptotic analysis and deployment optimization

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• dc.contributor.author Diaz-Vilor, Carles
• dc.contributor.author Lozano Solsona, Angel
• dc.contributor.author Jafarkhani, Hamid
• dc.date.accessioned 2023-05-11T06:23:05Z
• dc.date.available 2023-05-11T06:23:05Z
• dc.date.issued 2023
• dc.description.abstract Recently, cell-free (CF) architectures, in which every user can potentially communicate with every base station, have received a lot of attention. This paper considers the uplink of fully and partially centralized CF networks where unmanned aerial vehicles serve as flying base stations (FBSs). A subset of FBSs participates in the reception of each user and a subset of users is received by each FBS. Deterministic equivalent expressions, exact asymptotically in the subset sizes and approximate for finite dimensions thereof, are derived for the spectral efficiency under Rician fading. Capitalizing on these expressions, the FBS deployment problem is investigated for different receiver architectures. The nonconvex deployment problem, tackled through a combination of gradient-based and Gibbs sampling algorithms, results in a superior performance with respect to a square grid deployment; this superiority extends to the minimum and aggregate spectral efficiency for both fully and partially centralized cell-free networks.
• dc.description.sponsorship This work was supported in part by NSF Award CCF-1815339, in part by European Research Council (ERC) under Grant 694975, in part by the ICREA Academia Program, and in part by the Fractus Chair on Tech Transfer and 6G.
• dc.format.mimetype application/pdf
• dc.identifier.citation Diaz-Vilor C, Lozano A, Jafarkhani H. Cell-free UAV networks: asymptotic analysis and deployment optimization. IEEE Trans Wirel Commun. 2023;22(5):3055-70. DOI: 10.1109/TWC.2022.3215941
• dc.identifier.doi http://dx.doi.org/10.1109/TWC.2022.3215941
• dc.identifier.issn 1536-1276
• dc.identifier.uri http://hdl.handle.net/10230/56773
• dc.language.iso eng
• dc.publisher Institute of Electrical and Electronics Engineers (IEEE)
• dc.relation.ispartof IEEE Transactions on Wireless Communications. 2023;22(5):3055-70.
• dc.rights This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
• dc.rights.accessRights info:eu-repo/semantics/openAccess
• dc.rights.uri http://creativecommons.org/licenses/by/4.0/
• dc.subject.keyword Cell-Free
• dc.subject.keyword UAV
• dc.subject.keyword deployment optimization
• dc.subject.keyword flying BS
• dc.subject.keyword MMSE
• dc.subject.keyword MRC
• dc.subject.keyword C-RAN
• dc.subject.keyword large-scale system
• dc.title Cell-free UAV networks: asymptotic analysis and deployment optimization
• dc.type info:eu-repo/semantics/article
• dc.type.version info:eu-repo/semantics/publishedVersion