Capacity limits of spectrum-sharing systems over hyper-fading channels

Handle URI:
http://hdl.handle.net/10754/561704
Title:
Capacity limits of spectrum-sharing systems over hyper-fading channels
Authors:
Ekin, Sabit; Yilmaz, Ferkan; Çelebi, Hasari Burak; Qaraqe, Khalid A.; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 ) ; Serpedin, Erchin
Abstract:
Cognitive 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.
KAUST Department:
Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Physical Sciences and Engineering (PSE) Division; Communication Theory Lab
Publisher:
Wiley-Blackwell
Journal:
Wireless Communications and Mobile Computing
Issue Date:
20-Jan-2011
DOI:
10.1002/wcm.1082
Type:
Article
ISSN:
15308669
Sponsors:
The 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.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Electrical Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorEkin, Sabiten
dc.contributor.authorYilmaz, Ferkanen
dc.contributor.authorÇelebi, Hasari Buraken
dc.contributor.authorQaraqe, Khalid A.en
dc.contributor.authorAlouini, Mohamed-Slimen
dc.contributor.authorSerpedin, Erchinen
dc.date.accessioned2015-08-03T09:02:43Zen
dc.date.available2015-08-03T09:02:43Zen
dc.date.issued2011-01-20en
dc.identifier.issn15308669en
dc.identifier.doi10.1002/wcm.1082en
dc.identifier.urihttp://hdl.handle.net/10754/561704en
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.en
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.en
dc.publisherWiley-Blackwellen
dc.subjectachievable capacityen
dc.subjectcognitive radioen
dc.subjecthyper fadingen
dc.subjecthyper-Nakagami fadingen
dc.subjectmixture modelen
dc.subjectmultiuser diversityen
dc.subjectspectrum-sharing systemen
dc.titleCapacity limits of spectrum-sharing systems over hyper-fading channelsen
dc.typeArticleen
dc.contributor.departmentElectrical Engineering Programen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentCommunication Theory Laben
dc.identifier.journalWireless Communications and Mobile Computingen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, Texas A and M University, College Station, TX 77843, United Statesen
dc.contributor.institutionElectrical and Computer Engineering Program, Texas A and M University at Qatar, Education City, Doha, Qataren
kaust.authorYilmaz, Ferkanen
kaust.authorAlouini, Mohamed-Slimen
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