Show simple item record

dc.contributor.advisorAlouini, Mohamed-Slim
dc.contributor.authorHyadi, Amal
dc.date.accessioned2013-05-14T15:49:51Z
dc.date.available2013-05-14T15:49:51Z
dc.date.issued2013-05-08
dc.identifier.doi10.25781/KAUST-I6321
dc.identifier.urihttp://hdl.handle.net/10754/291095
dc.description.abstractThis thesis aims to investigate the incorporation of cooperative techniques in cognitive radio networks over Nakagami-m fading channels. These last years, spectrum sharing mechanisms has gained a lot of interest in the wireless communication domain. Using cooperation in a cognitive set up make the use of spectrum much more efficient. Moreover, it helps to extend the coverage area of the cognitive network and also to reduce the transmitting power and, thus, the generated interference. In this work, we consider two particular scenarios for cooperative cognitive radio systems. The first scenario consider multihop regenerative relaying in an underlay cognitive set up. The cooperation is performed in the secondary system, in the presence of multiple primary users. Both interference power and peak power constraints are taking into account. Closed-form expressions for the statistical characteristics and multiple end- to-end performance metrics are derived. Different scenarios are presented to illustrate the obtained results and Monte Carlo simulations confirm the accuracy of our analytical derivations. In the second part of this work, we consider an overlay cognitive network with the spectrally efficient two-phase two-way relaying protocol. Two relay selection techniques, optimizing both the primary and the secondary communication, are presented. The overall outage performance is investigated and an optimal power allocation scheme, that ameliorate the outage performance of the system, is proposed. Numerical simulations are presented to illustrate and compare the obtained results.
dc.language.isoen
dc.subjectCooperation
dc.subjectCognitive
dc.subjectFading
dc.subjectNakagami-m
dc.titleCooperative Cognitive Radio Systems over Nakagami-m Fading Channels
dc.typeThesis
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
thesis.degree.grantorKing Abdullah University of Science and Technology
dc.contributor.committeememberAlouini, Mohamed-Slim
dc.contributor.committeememberShihada, Basem
dc.contributor.committeememberSultan Salem, Ahmed Kamal
thesis.degree.disciplineElectrical Engineering
thesis.degree.nameMaster of Science
refterms.dateFOA2014-05-13T00:00:00Z


Files in this item

Thumbnail
Name:
Amal Hyadi Final Thesis.pdf
Size:
936.3Kb
Format:
PDF
Description:
Amal Hyadi Final Thesis

This item appears in the following Collection(s)

Show simple item record