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dc.contributor.authorEkin, Sabit
dc.contributor.authorYilmaz, Ferkan
dc.contributor.authorÇelebi, Hasari Burak
dc.contributor.authorQaraqe, Khalid A.
dc.contributor.authorAlouini, Mohamed-Slim
dc.contributor.authorSerpedin, Erchin
dc.date.accessioned2015-08-03T09:02:43Z
dc.date.available2015-08-03T09:02:43Z
dc.date.issued2011-01-20
dc.identifier.citationEkin, S., Yilmaz, F., Celebi, H., Qaraqe, K. A., Alouini, M.-S., & Serpedin, E. (2011). Capacity limits of spectrum-sharing systems over hyper-fading channels. Wireless Communications and Mobile Computing, 12(16), 1471–1480. doi:10.1002/wcm.1082
dc.identifier.issn15308669
dc.identifier.doi10.1002/wcm.1082
dc.identifier.urihttp://hdl.handle.net/10754/561704
dc.description.abstractCognitive radio (CR) with spectrum-sharing feature is a promising technique to address the spectrum under-utilization problem in dynamically changing environments. In this paper, the achievable capacity gain of spectrum-sharing systems over dynamic fading environments is studied. To perform a general analysis, a theoretical fading model called hyper-fading model that is suitable to the dynamic nature of CR channel is proposed. Closed-form expressions of probability density function (PDF) and cumulative density function (CDF) of the signal-to-noise ratio (SNR) for secondary users (SUs) in spectrum-sharing systems are derived. In addition, the capacity gains achievable with spectrum-sharing systems in high and low power regions are obtained. The effects of different fading figures, average fading powers, interference temperatures, peak powers of secondary transmitters, and numbers of SUs on the achievable capacity are investigated. The analytical and simulation results show that the fading figure of the channel between SUs and primary base-station (PBS), which describes the diversity of the channel, does not contribute significantly to the system performance gain. © 2011 John Wiley & Sons, Ltd.
dc.description.sponsorshipThe authors wish to thank Dr Serhan Yarkan for his help during the preparation of revisions. This work is supported by Qatar National Research Fund (QNRF) grant through National Priority Research Program (NPRP) no. 08-152-2-043. QNRF is an initiative of Qatar Foundation.
dc.publisherWiley
dc.subjectachievable capacity
dc.subjectcognitive radio
dc.subjecthyper fading
dc.subjecthyper-Nakagami fading
dc.subjectmixture model
dc.subjectmultiuser diversity
dc.subjectspectrum-sharing system
dc.titleCapacity limits of spectrum-sharing systems over hyper-fading channels
dc.typeArticle
dc.contributor.departmentCommunication Theory Lab
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalWireless Communications and Mobile Computing
dc.contributor.institutionDepartment of Electrical and Computer Engineering, Texas A and M University, College Station, TX 77843, United States
dc.contributor.institutionElectrical and Computer Engineering Program, Texas A and M University at Qatar, Education City, Doha, Qatar
kaust.personYilmaz, Ferkan
kaust.personAlouini, Mohamed-Slim
dc.date.published-online2011-01-20
dc.date.published-print2012-11


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