Performance of fading multi-user diversity for underlay cognitive networksy

Handle URI:
http://hdl.handle.net/10754/564717
Title:
Performance of fading multi-user diversity for underlay cognitive networksy
Authors:
Khan, Fahd Ahmed; Debbah, Méroúane; Tourki, Kamel; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 )
Abstract:
Having multiple secondary users (SUs) can be exploited to achieve multiuser diversity and improve the throughput of the underlay secondary network. In the cognitive setting, satisfying the interference constraint is essential, and thus, a scheduling scheme is considered where some SUs are preselected based on the low interference power. From this subset, the SU that yields the highest throughput is selected for transmission. This scheduling scheme helps to lower the interference power while giving good throughput. For an independent but not identically distributed Nakagami-m fading channel, we obtain exact closed-form expressions of the capacity of this scheduling scheme. Furthermore, the scheduling time of SUs is characterized and closed-form expressions for the mean time after which a SU is selected for transmission are obtained. Numerical simulations are performed to corroborate the derived analytical results. Our results show that at low interference threshold, increasing transmit power of the SUs is not beneficial and results in reduced capacity. Furthermore, the channel idle time (i.e. time that no user is utilizing the channel) reduces with increasing the number of SUs. © 2013 IEEE.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Electrical Engineering Program; Communication Theory Lab
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2013 IEEE International Conference on Acoustics, Speech and Signal Processing
Conference/Event name:
2013 38th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013
Issue Date:
May-2013
DOI:
10.1109/ICASSP.2013.6638669
Type:
Conference Paper
ISSN:
15206149
ISBN:
9781479903566
Appears in Collections:
Conference Papers; Electrical Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorKhan, Fahd Ahmeden
dc.contributor.authorDebbah, Méroúaneen
dc.contributor.authorTourki, Kamelen
dc.contributor.authorAlouini, Mohamed-Slimen
dc.date.accessioned2015-08-04T07:13:31Zen
dc.date.available2015-08-04T07:13:31Zen
dc.date.issued2013-05en
dc.identifier.isbn9781479903566en
dc.identifier.issn15206149en
dc.identifier.doi10.1109/ICASSP.2013.6638669en
dc.identifier.urihttp://hdl.handle.net/10754/564717en
dc.description.abstractHaving multiple secondary users (SUs) can be exploited to achieve multiuser diversity and improve the throughput of the underlay secondary network. In the cognitive setting, satisfying the interference constraint is essential, and thus, a scheduling scheme is considered where some SUs are preselected based on the low interference power. From this subset, the SU that yields the highest throughput is selected for transmission. This scheduling scheme helps to lower the interference power while giving good throughput. For an independent but not identically distributed Nakagami-m fading channel, we obtain exact closed-form expressions of the capacity of this scheduling scheme. Furthermore, the scheduling time of SUs is characterized and closed-form expressions for the mean time after which a SU is selected for transmission are obtained. Numerical simulations are performed to corroborate the derived analytical results. Our results show that at low interference threshold, increasing transmit power of the SUs is not beneficial and results in reduced capacity. Furthermore, the channel idle time (i.e. time that no user is utilizing the channel) reduces with increasing the number of SUs. © 2013 IEEE.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.subjectCognitive Radioen
dc.subjectErgodic Capacityen
dc.subjectFading Channelsen
dc.subjectMulti-user Diversityen
dc.titlePerformance of fading multi-user diversity for underlay cognitive networksyen
dc.typeConference Paperen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentElectrical Engineering Programen
dc.contributor.departmentCommunication Theory Laben
dc.identifier.journal2013 IEEE International Conference on Acoustics, Speech and Signal Processingen
dc.conference.date26 May 2013 through 31 May 2013en
dc.conference.name2013 38th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013en
dc.conference.locationVancouver, BCen
dc.contributor.institutionAlcatel-Lucent, SUPELEC, Gif-sur-Yvette, Franceen
dc.contributor.institutionECEN Program, Texas A and M Univ. at Qatar, Education City, Doha, Qataren
kaust.authorKhan, Fahd Ahmeden
kaust.authorAlouini, Mohamed-Slimen
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