Optimum power allocation for multiuser OFDM with arbitrary signal constellations

Lozano Solsona, Angel; Tulino, Antonia M.; Verdú, Sergio

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dc.contributor.author	Lozano Solsona, Angel
dc.contributor.author	Tulino, Antonia M.
dc.contributor.author	Verdú, Sergio
dc.date.accessioned	2012-01-26T12:16:24Z
dc.date.available	2012-01-26T12:16:24Z
dc.date.issued	2008
dc.identifier.citation	Lozano A, Tulino A M, Verdu S. Optimum power allocation for multiuser OFDM with arbitrary signal constellations. IEEE Transactions on Communications. 2008; 56(5): 828-837. DOI 10.1109/TCOMM.2008.060211
dc.identifier.issn	0090-6778
dc.identifier.uri	http://hdl.handle.net/10230/16144
dc.description.abstract	This paper formulates power allocation policies that maximize the region of mutual informations/nachievable in multiuser downlink OFDM channels. Arbitrary partitioning of/nthe available tones among users and arbitrary modulation formats, possibly different for/nevery user, are considered. Two distinct policies are derived, respectively for slow fading/nchannels tracked instantaneously by the transmitter and for fast fading channels known/nonly statistically thereby. With instantaneous channel tracking, the solution adopts the/nform of a multiuser mercury/waterfilling procedure that generalizes the single-user mercury//nwaterfilling introduced in [1, 2]. With only statistical channel information, in contrast,/nthe mercury/waterfilling interpretation is lost. For both policies, a number of limiting/nregimes are explored and illustrative examples are provided.
dc.format.mimetype	application/pdf
dc.language.iso	eng
dc.publisher	Institute of Electrical and Electronics Engineers (IEEE)
dc.relation.ispartof	IEEE Transactions on Communications. 2008;56(5):828-37
dc.rights	© 2008 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./nThe final published article can be found at http://dx.doi.org/10.1109/TCOMM.2008.060211
dc.subject.other	Tractament del senyal
dc.subject.other	Comunicacions mòbils, Sistemes de
dc.subject.other	Ràdio -- interferències
dc.title	Optimum power allocation for multiuser OFDM with arbitrary signal constellations
dc.type	info:eu-repo/semantics/article
dc.identifier.doi	http://dx.doi.org/10.1109/TCOMM.2008.060211
dc.subject.keyword	Gaussian channels
dc.subject.keyword	Power allocation
dc.subject.keyword	Waterfilling
dc.subject.keyword	Mercury/waterfilling
dc.subject.keyword	Mutual information
dc.subject.keyword	MMSE
dc.subject.keyword	OFDM
dc.subject.keyword	Downlink
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.type.version	info:eu-repo/semantics/acceptedVersion