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dc.contributor.authorSala Álvarez, José
dc.contributor.authorRey Micolau, Francesc
dc.contributor.authorVillares Piera, Nemesio Javier
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.identifier.citationSala, J.; Rey, F.; Villares, Javier. Asymptotically optimum energy profile for successive interference cancellation in DS-CDMA under a power unbalance constraint. "IEEE communications letters", Febrer 2012, vol. 16, núm. 2, p. 172-175.
dc.description© 2011 IEEE. Personal use of this material is permitted. Permission from 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.
dc.description.abstractA new Ordinary Differential Equation (ODE) governing the SNIR evolution of a Successive Interference Canceller (SIC) for DS-CDMA is derived when the number of users tends to infinity and all users share the same channel encoder. Using Variational Calculus, this ODE is applied to obtaining the energy profile that maximizes the average spectral efficiency when a constraint on the power unbalance (maximum power to minimum power ratio) of received users is enforced. The conditions for extremality of the optimum energy profile are established in terms of the common encoder's Packet Error Rate (PER) function.
dc.format.extent4 p.
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Equacions diferencials i integrals
dc.subject.lcshDifferential equations
dc.subject.lcshSound --Recording and reproducing --Digital techniques.
dc.subject.othersuccessive interference cancellation power unbalance differential equation variational calculus packet error rate CDMA error propagation
dc.titleAsymptotically optimum energy profile for successive interference cancellation in DS-CDMA under a power unbalance constraint
dc.subject.lemacEquacions diferencials parcials
dc.subject.lemacSo -- Enregistrament i reproducció
dc.contributor.groupUniversitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.authorSala, J.; Rey, F.; Villares, Javier
local.citation.publicationNameIEEE communications letters

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