Bandwidth and power allocation for two-way relaying in overlay cognitive radio systems

Handle URI:
http://hdl.handle.net/10754/565014
Title:
Bandwidth and power allocation for two-way relaying in overlay cognitive radio systems
Authors:
Alsharoa, Ahmad M.; Ghazzai, Hakim ( 0000-0002-8636-4264 ) ; Yaacoub, Elias E.; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 )
Abstract:
In this paper, the problem of both bandwidth and power allocation for two-way multiple relay systems in overlay cognitive radio (CR) setup is investigated. In the CR overlay mode, primary users (PUs) cooperate with cognitive users (CUs) for mutual benefits. In our framework, we propose that the CUs are allowed to allocate a part of the PUs spectrum to perform their cognitive transmission. In return, acting as an amplify-and-forward two-way relays, they are used to support PUs to achieve their target data rates over the remaining bandwidth. More specifically, CUs acts as relays for the PUs and gain some spectrum as long as they respect a specific power budget and primary quality-of-service constraints. In this context, we first derive closed-form expressions for optimal transmit power allocated to PUs and CUs in order to maximize the cognitive objective. Then, we employ a strong optimization tool based on particle swarm optimization algorithm to find the optimal relay amplification gains and optimal cognitive released bandwidths as well. Our numerical results illustrate the performance of our proposed algorithm for different utility metrics and analyze the impact of some system parameters on the achieved performance.
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:
2014 IEEE Global Communications Conference
Conference/Event name:
2014 IEEE Global Communications Conference, GLOBECOM 2014
Issue Date:
Dec-2014
DOI:
10.1109/GLOCOM.2014.7036925
Type:
Conference Paper
ISBN:
9781479935116
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.authorAlsharoa, Ahmad M.en
dc.contributor.authorGhazzai, Hakimen
dc.contributor.authorYaacoub, Elias E.en
dc.contributor.authorAlouini, Mohamed-Slimen
dc.date.accessioned2015-08-04T07:28:15Zen
dc.date.available2015-08-04T07:28:15Zen
dc.date.issued2014-12en
dc.identifier.isbn9781479935116en
dc.identifier.doi10.1109/GLOCOM.2014.7036925en
dc.identifier.urihttp://hdl.handle.net/10754/565014en
dc.description.abstractIn this paper, the problem of both bandwidth and power allocation for two-way multiple relay systems in overlay cognitive radio (CR) setup is investigated. In the CR overlay mode, primary users (PUs) cooperate with cognitive users (CUs) for mutual benefits. In our framework, we propose that the CUs are allowed to allocate a part of the PUs spectrum to perform their cognitive transmission. In return, acting as an amplify-and-forward two-way relays, they are used to support PUs to achieve their target data rates over the remaining bandwidth. More specifically, CUs acts as relays for the PUs and gain some spectrum as long as they respect a specific power budget and primary quality-of-service constraints. In this context, we first derive closed-form expressions for optimal transmit power allocated to PUs and CUs in order to maximize the cognitive objective. Then, we employ a strong optimization tool based on particle swarm optimization algorithm to find the optimal relay amplification gains and optimal cognitive released bandwidths as well. Our numerical results illustrate the performance of our proposed algorithm for different utility metrics and analyze the impact of some system parameters on the achieved performance.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.subjectOverlay cognitive radio systemsen
dc.subjectParticle swarm optimization algorithmen
dc.subjectTwo-way relaying techniqueen
dc.titleBandwidth and power allocation for two-way relaying in overlay cognitive radio systemsen
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.journal2014 IEEE Global Communications Conferenceen
dc.conference.date8 December 2014 through 12 December 2014en
dc.conference.name2014 IEEE Global Communications Conference, GLOBECOM 2014en
dc.contributor.institutionQatar Mobility Innovations Center (QMIC), Qatar Science and Technology ParkDoha, Qataren
kaust.authorAlsharoa, Ahmad M.en
kaust.authorGhazzai, Hakimen
kaust.authorAlouini, Mohamed-Slimen
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