Relay selection in underlay cognitive networks with fixed transmission power nodes

Handle URI:
http://hdl.handle.net/10754/562875
Title:
Relay selection in underlay cognitive networks with fixed transmission power nodes
Authors:
Hussain, Syed Imtiaz; Abdallah, Mohamed M.; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 ) ; Qaraqe, Khalid A.; Hasna, Mazen Omar
Abstract:
Underlay cognitive networks operate simultaneously with primary networks satisfying stringent interference constraints, which reduces their transmission power and coverage area. To reach remote destinations, secondary sources use relaying techniques. Selecting the best relay among the available ones is a well known technique. Recently, selective cooperation is investigated in cognitive networks where the secondary nodes can adapt their transmission power to always satisfy the interference threshold. In this paper, we investigate a situation where the secondary nodes have a fixed transmission power and may violate the interference threshold. We present two relay selection schemes; the first one excludes the relays not satisfying the interference constraint and then picks up a relay from the remaining ones that can provide the maximum signal-to-noise ratio (SNR). The other scheme uses a quotient of the relay link SNR and the interference from the relay to the primary user and optimizes it to maximise the relay link SNR. We derive closed form expressions for outage probability, bit error rate, channel capacity and diversity of the system for both schemes by using tight approximations. We also study mutual effects of interference. Simulation results confirm the analytical results and reveal that the relay selection is feasible at low SNRs. Copyright © 2013 John Wiley & Sons, Ltd.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Electrical Engineering Program; Communication Theory Lab
Publisher:
Wiley-Blackwell
Journal:
Transactions on Emerging Telecommunications Technologies
Issue Date:
31-Jul-2013
DOI:
10.1002/ett.2691
Type:
Article
ISSN:
1124318X
Sponsors:
This publication was made possible by National Priority Research Program grant No. 5-250-2-087 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.
Appears in Collections:
Articles; Electrical Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorHussain, Syed Imtiazen
dc.contributor.authorAbdallah, Mohamed M.en
dc.contributor.authorAlouini, Mohamed-Slimen
dc.contributor.authorQaraqe, Khalid A.en
dc.contributor.authorHasna, Mazen Omaren
dc.date.accessioned2015-08-03T11:13:43Zen
dc.date.available2015-08-03T11:13:43Zen
dc.date.issued2013-07-31en
dc.identifier.issn1124318Xen
dc.identifier.doi10.1002/ett.2691en
dc.identifier.urihttp://hdl.handle.net/10754/562875en
dc.description.abstractUnderlay cognitive networks operate simultaneously with primary networks satisfying stringent interference constraints, which reduces their transmission power and coverage area. To reach remote destinations, secondary sources use relaying techniques. Selecting the best relay among the available ones is a well known technique. Recently, selective cooperation is investigated in cognitive networks where the secondary nodes can adapt their transmission power to always satisfy the interference threshold. In this paper, we investigate a situation where the secondary nodes have a fixed transmission power and may violate the interference threshold. We present two relay selection schemes; the first one excludes the relays not satisfying the interference constraint and then picks up a relay from the remaining ones that can provide the maximum signal-to-noise ratio (SNR). The other scheme uses a quotient of the relay link SNR and the interference from the relay to the primary user and optimizes it to maximise the relay link SNR. We derive closed form expressions for outage probability, bit error rate, channel capacity and diversity of the system for both schemes by using tight approximations. We also study mutual effects of interference. Simulation results confirm the analytical results and reveal that the relay selection is feasible at low SNRs. Copyright © 2013 John Wiley & Sons, Ltd.en
dc.description.sponsorshipThis publication was made possible by National Priority Research Program grant No. 5-250-2-087 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.en
dc.publisherWiley-Blackwellen
dc.titleRelay selection in underlay cognitive networks with fixed transmission power nodesen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentElectrical Engineering Programen
dc.contributor.departmentCommunication Theory Laben
dc.identifier.journalTransactions on Emerging Telecommunications Technologiesen
dc.contributor.institutionTexas A and M University at Qatar, PO Box 23874, Doha, Qataren
dc.contributor.institutionQatar University, Doha, Qataren
dc.contributor.institutionDepartment of Electronics and Communications Engineering, Cairo University, P.O. Box 12613, Giza, Egypten
kaust.authorAlouini, Mohamed-Slimen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.