Angelosante, DanieleBiglieri, EzioLops, MarcoUniversitat Pompeu Fabra2013-03-142013-03-142008Angelosante D, Biglieri E, Lops M. Multiuser detection with an unknown number of active users: receiver design. In: 16th European Signal Processing Conference (EUSIPCO 2008); 2008 Aug 25-29; Lausanne, Switzerland. [S.l.]: EURASIP, c2008. 5 fulls.2219-5491http://hdl.handle.net/10230/20509Comunicació presentada en la 16th European Signal Processing Conference (EUSIPCO 2008), celebrada els dies 25, 26, 27, 28 i 29 d’agost de 2008 a Lausana (Suïssa), organitzada per la European Association for Signal Processing (EURASIP).In multiuser detection, the set of users active at any time may be unknown to the receiver. In these conditions, optimum reception consists of detecting simultaneously the set of active/nusers and their data, problem that can be solved exactly by applying random-set theory (RST) and Bayesian recursions (BR). However, implementation of optimum receivers may be limited by their complexity, which grows exponentially with the number of potential users. In this paper we examine three strategies leading to reduced-complexity receivers./nIn particular, we show how a simple approximation of BRs enables the use of Sphere Detection (SD) algorithm, which/nexhibits satisfactory performance with limited complexity.application/pdfeng© EURASIP. The paper is provided after EURASIP's permission.Tractament del senyalComunicació sense fil, Sistemes deinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccess