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المؤلفChamkhia H.
المؤلفHasna , Mazen
تاريخ الإتاحة2022-04-26T11:06:53Z
تاريخ النشر2013
اسم المنشورInternational Conference on ICT Convergence
المصدرScopus
المعرّفhttp://dx.doi.org/10.1109/ICTC.2013.6675419
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84899449438&doi=10.1109%2fICTC.2013.6675419&partnerID=40&md5=69ac610d31a0f0915ce170b491dc2570
معرّف المصادر الموحدhttp://hdl.handle.net/10576/30514
الملخصCognitive 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 In fact, due to feedback or scheduling delays, in practice, the relay and/or the source node can have outdated channel state information. This outdated information will cause a performance degradation.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.
اللغةen
الناشرIEEE Computer Society
الموضوعChannel 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Outdated channel state informations
Outdated information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
العنوانPerformance analysis of relay selection schemes in underlay cognitive networks with imperfect channel state information
النوعConference Paper
الصفحات556-560


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