Spectrum Availability Model of Secondary Users in Cognitive Radio Networks

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dc.contributor.authorRahimian, Nariman
dc.contributor.authorGeorghiades, Costas N.
dc.contributor.authorÇelebi, Hasari
dc.contributor.authorQaraqe, Khalid A.
dc.date.accessioned2025-10-29T11:37:36Z
dc.date.issued2012
dc.departmentFakülteler, Mühendislik Fakültesi, Bilgisayar Mühendisliği Bölümü
dc.description8th IEEE International Wireless Communications and Mobile Computing Conference (IWCMC) -- AUG 27-31, 2012 -- Limassol, CYPRUS
dc.description.abstractCognitive Radio systems are a promising solution to the spectrum scarcity problem, but precise modeling of spectrum utilization is vital to the analysis and design of such systems. In this paper, we mathematically derive the Probability Mass Function (PMF) of the fraction of available subcarriers for the secondary users in an OFDMA based cognitive radio system for different requesting distributions. The PMF of the total number of requested subcarriers from all primary users is derived and the effect of the requesting distribution on the asymptotic spectrum availability for secondary users is studied. It is shown that if a requesting distribution is undesired, providing more subcarriers will not increase the spectrum availability for the secondary network.
dc.description.sponsorshipIEEE,IEEE Cyprus Sect,Frederick Univ
dc.description.sponsorshipNPRP grant from the Qatar National Research Fund ( a member of Qatar Foundation). [08101 - 2 - 025]
dc.description.sponsorshipThis publication was made possible by NPRP grant # 08101 - 2 - 025 from the Qatar National Research Fund ( a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.
dc.identifier.endpage365
dc.identifier.isbn978-1-4577-1379-8
dc.identifier.issn2376-6492
dc.identifier.orcid0000-0002-0766-9212
dc.identifier.scopus2-s2.0-84869187260
dc.identifier.scopusqualityN/A
dc.identifier.startpage360
dc.identifier.urihttps://hdl.handle.net/20.500.14854/13934
dc.identifier.wosWOS:000312146500059
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherIEEE
dc.relation.ispartof2012 8th International Wireless Communications and Mobile Computing Conference (Iwcmc)
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20251020
dc.subjectCognitive radio
dc.subjectdynamic spectrum access
dc.subjectOFDMA
dc.subjectspectrum availability
dc.titleSpectrum Availability Model of Secondary Users in Cognitive Radio Networks
dc.typeConference Object

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