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AuthorChamkhia H.
AuthorHasna , Mazen
Available date2022-04-26T11:06:53Z
Publication Date2013
Publication NameInternational Conference on ICT Convergence
ResourceScopus
Identifierhttp://dx.doi.org/10.1109/ICTC.2013.6675419
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84899449438&doi=10.1109%2fICTC.2013.6675419&partnerID=40&md5=69ac610d31a0f0915ce170b491dc2570
URIhttp://hdl.handle.net/10576/30514
AbstractCognitive Radio (CR) aims to improve spectrum utilization by allowing unlicensed users to access the licensed spectrum and to coexist with primary user (PU) while respecting the PU's restrictions. An interesting case to consider in underlay CR is when the channel state informations (CSI) of the links between secondary users (SUs) or between SUs and PU are imperfect. In fact, due to feedback or scheduling delays, in practice, the relay and/or the source node can have outdated channel state information. This outdated information will cause a performance degradation. In this paper, its impact on relay selection schemes and PU are investigated. To evaluate the impact of imperfect CSI on the secondary network, closed form expressions of the bit error rate (BER), the outage probability and the ergodic capacity are derived. Additionally, we investigate how harmful imperfect CSI can be on the PU's side. The theoretical results obtained in this work are confirmed through simulations.
Languageen
PublisherIEEE Computer Society
SubjectChannel state information
Cognitive radio
Telecommunication repeaters
Closed-form expression
Imperfect channel state information
Imperfect CSI
Outdated channel state informations
Outdated information
Performance analysis
Performance degradation
Relay selection
Information technology
TitlePerformance analysis of relay selection schemes in underlay cognitive networks with imperfect channel state information
TypeConference Paper
Pagination556-560
dc.accessType Abstract Only


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