Mojahedian, Mohammad MahdiLozano Solsona, Angel2022-02-032022-02-032021Mojahedian MM, Lozano A. Subset regularized zero-forcing precoders for cell-free C-RANs. In: Proceedings of the 29th European Signal Processing Conference (EUSIPCO 2021); 2021 Aug 23-27; Dublin, Ireland. New York: IEEE; 2021. p. 915-9. DOI: 10.23919/EUSIPCO54536.2021.9616211978-9-0827-9706-02076-1465http://hdl.handle.net/10230/52415Comunicació presentada a: 29th European Signal Processing Conference (EUSIPCO) celebrat del 23 al 27 d'agost de 2021 a Dublin, Irlanda.This paper formulates regularized zero-forcing (RZF) precoders that are both network- and user-centric for the downlink of centralized radio-access networks operating in a cell-free fashion. The transmission to every user involves a distinct subset of access points (APs), and every AP participates in the transmission to a distinct subset of users, hence the moniker subset precoders. These subsets, defined on the basis of the large-scale channel gains between users and APs, capture the most relevant signal and interference contributions while disregarding those whose processing is cost-ineffective and whose associated channel estimations would incur unnecessary overheads. With that, subset precoding approaches the performance of network-wide RZF, for the power allocation strategies of interest, while being scalable.application/pdfeng© 2021. IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. http://dx.doi.org/10.23919/EUSIPCO54536.2021.9616211info:eu-repo/semantics/conferenceObjecthttp://dx.doi.org/10.23919/EUSIPCO54536.2021.9616211info:eu-repo/semantics/openAccess