Non-peaky signals in wideband fading channels: achievable bit rates and optimal bandwidth

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• dc.contributor.author Lozano Solsona, Angelca
• dc.contributor.author Porrat, Danaca
• dc.date.accessioned 2012-01-09T10:01:36Z
• dc.date.available 2012-01-09T10:01:36Z
• dc.date.issued 2011ca
• dc.description.abstract In the context of fading channels it is well established that, with a constrained transmit power, the bit rates achievable by signals that are not peaky vanish as the bandwidth grows without bound. Stepping back from the limit, we characterize the highest bit rate achievable by such non-peaky signals and the approximate bandwidth where that apex occurs. As it turns out, the gap between the highest rate achievable without peakedness and the infinite-bandwidth capacity (with unconstrained peakedness) is small for virtually all settings of interest to wireless communications. Thus, although strictly achieving capacity in wideband fading channels does require signal peakedness, bit rates not far from capacity can be achieved with conventional signaling formats that do not exhibit the serious practical drawbacks associated with peakedness. In addition, we show that the asymptotic decay of bit rate in the absence of peakedness usually takes hold at bandwidths so large that wideband fading models are called into question. Rather, ultrawideband models ought to be used.ca
• dc.description.sponsorship Lozano's work is supported by AGAUR (2009 SGR 70) and by the Spanish Ministry of Science and Innovation (Refs. TEC2009-13000 and CONSOLIDER-INGENIO CSD2008-00010 ”COMONSENS”). Porrat's work is supported by/nISF Grant 235/10.en
• dc.format.mimetype application/pdfca
• dc.identifier.citation Lozano A, Porrat D. Non-peaky signals in wideband fading channels: achievable bit rates and optimal bandwidth. IEEE Transactions on Wireless Communications. 2012; 11(1): 246-257. DOI 10.1109/TWC.2011.111611.110263
• dc.identifier.doi http://dx.doi.org/10.1109/TWC.2011.111611.110263
• dc.identifier.issn 1536-1276
• dc.identifier.uri http://hdl.handle.net/10230/16083
• dc.language.iso engca
• dc.publisher Institute of Electrical and Electronics Engineers (IEEE)ca
• dc.relation.ispartof IEEE Transactions on Wireless Communications. 2012;11(1):246-57
• dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/TEC2009-13000
• dc.relation.projectID info:eu-repo/grantAgreement/ES/2PN/CSD2008-00010
• dc.rights © 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./nThe on-line published article can be found at http://ieeexplore.ieee.org/ca
• dc.rights.accessRights info:eu-repo/semantics/openAccessen
• dc.subject.keyword Widebanden
• dc.subject.keyword channel capacityen
• dc.subject.keyword fadingen
• dc.subject.keyword mutual informationen
• dc.subject.keyword peaky signalsen
• dc.subject.keyword ultrawidebanden
• dc.subject.other Comunicació sense fil, Sistemes deca
• dc.title Non-peaky signals in wideband fading channels: achievable bit rates and optimal bandwidthca
• dc.type info:eu-repo/semantics/articleca
• dc.type.version info:eu-repo/semantics/acceptedVersionen