Joint Bandwidth and Power Allocation for MIMO Two-Way Relays-Assisted Overlay Cognitive Radio Systems

Handle URI:
http://hdl.handle.net/10754/584259
Title:
Joint Bandwidth and Power Allocation for MIMO Two-Way Relays-Assisted Overlay Cognitive Radio Systems
Authors:
Alsharoa, Ahmad; Ghazzai, Hakim; Yaacoub, Elias; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 ) ; Kamal, Ahmed
Abstract:
This paper studies the achievable cognitive sum rate of an overlay cognitive radio (CR) system assisted with multiple antennas two-way relays in which primary users (PUs) cooperate with cognitive users (CUs) for mutual benefits. In this context, the problem of both bandwidth and power allocation is investigated. We propose that the CUs are allowed to allocate a part of the PUs spectrum to perform their cognitive transmission. In return, acting as amplify-and-forward two-way relays, they are exploited to support PUs to reach their target data rates over the remaining bandwidth. Power expressions for optimal transmit power allocated per PU and CU antenna are derived under primary quality-of-service constraint in addition to bandwidth and power budget constraints. More specifically, CUs act as relays for the PUs transmission and gain some spectrum as long as they respect these constraints. After deriving the optimal transmit powers, we employ a strong optimization tool based on swarm intelligence to optimize the full and complex relay amplification gain matrices in addition to the bandwidths released to primary and cognitive transmission. Furthermore, three different utility functions are considered in our optimization problems depending on the level of fairness among CUs.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Joint Bandwidth and Power Allocation for MIMO Two-Way Relays-Assisted Overlay Cognitive Radio Systems 2015:1 IEEE Transactions on Cognitive Communications and Networking
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Transactions on Cognitive Communications and Networking
Issue Date:
8-Oct-2015
DOI:
10.1109/TCCN.2015.2488623
Type:
Article
ISSN:
2332-7731
Additional Links:
http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7294663
Appears in Collections:
Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAlsharoa, Ahmaden
dc.contributor.authorGhazzai, Hakimen
dc.contributor.authorYaacoub, Eliasen
dc.contributor.authorAlouini, Mohamed-Slimen
dc.contributor.authorKamal, Ahmeden
dc.date.accessioned2015-12-21T08:57:14Zen
dc.date.available2015-12-21T08:57:14Zen
dc.date.issued2015-10-08en
dc.identifier.citationJoint Bandwidth and Power Allocation for MIMO Two-Way Relays-Assisted Overlay Cognitive Radio Systems 2015:1 IEEE Transactions on Cognitive Communications and Networkingen
dc.identifier.issn2332-7731en
dc.identifier.doi10.1109/TCCN.2015.2488623en
dc.identifier.urihttp://hdl.handle.net/10754/584259en
dc.description.abstractThis paper studies the achievable cognitive sum rate of an overlay cognitive radio (CR) system assisted with multiple antennas two-way relays in which primary users (PUs) cooperate with cognitive users (CUs) for mutual benefits. In this context, the problem of both bandwidth and power allocation is investigated. We propose that the CUs are allowed to allocate a part of the PUs spectrum to perform their cognitive transmission. In return, acting as amplify-and-forward two-way relays, they are exploited to support PUs to reach their target data rates over the remaining bandwidth. Power expressions for optimal transmit power allocated per PU and CU antenna are derived under primary quality-of-service constraint in addition to bandwidth and power budget constraints. More specifically, CUs act as relays for the PUs transmission and gain some spectrum as long as they respect these constraints. After deriving the optimal transmit powers, we employ a strong optimization tool based on swarm intelligence to optimize the full and complex relay amplification gain matrices in addition to the bandwidths released to primary and cognitive transmission. Furthermore, three different utility functions are considered in our optimization problems depending on the level of fairness among CUs.en
dc.language.isoenen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=7294663en
dc.rights(c) 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.en
dc.subjectOverlay cognitive radio systemsen
dc.subjectmultiple-input multiple-output antennasen
dc.subjecttwo-way relaying techniqueen
dc.titleJoint Bandwidth and Power Allocation for MIMO Two-Way Relays-Assisted Overlay Cognitive Radio Systemsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalIEEE Transactions on Cognitive Communications and Networkingen
dc.eprint.versionPost-printen
dc.contributor.institutionIowa State University (ISU), Ames, Iowa, USAen
dc.contributor.institutionQatar Mobility Innovations Center (QMIC), Qatar Science and Technology Park, Doha, Qataren
dc.contributor.institutionStrategic Decision Group (SDG), and with the Lebanon Faculty of Computer Studies, Arab Open University (AOU), Beirut, Lebanonen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorAlouini, Mohamed-Slimen
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