Cooperative Spectrum Sensing (CSS) allows Cognitive Radio Networks (CRNs) to locate
vacant spectrum channels and to protect active Primary Users (PUs). However,
the achieved detection accuracy is proportional to the duration of the CSS process
which, unfortunately, reduces the time of useful communication as well as increases
the Co-Channel Interference (CCI) perceived by an active PU. To overcome this, this
thesis proposes three CSS strategies, namely the Dual-Threshold CSS (DTCSS), the
Maximum CSS (MCSS), and the Max-Min CSS (MMCSS). These strategies reduce
the number of reporting terminals while maintaining reliable performance and minimal
CCI e ect. The performance of these three methods is analyzed, and the numerical
and simulations results illustrate the accuracy of the derived results as well as the
achieved performance gains. The second part of this thesis studies the impact of CCI
on the performance of a number of transmission techniques used by CRNs. These are
Chase combining Hybrid Automatic Repeat Request (HAQR), Fixed Relaying (FR),
Selective Relaying (SR), Incremental Relaying (IR), and Selective Incremental Relaying
(SIR). The performance of these techniques is studied in terms of the average
spectral e ciency, the outage probability, and the error probability. To obtain closed
forms for the error probabilities, this thesis proposes a novel accurate approximation
of the exponential integral function using a sum of exponentials. / Thesis (Ph.D, Electrical & Computer Engineering) -- Queen's University, 2013-02-05 13:39:22.35
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OKQ.1974/7808 |
| Date | 05 February 2013 |
| Creators | Abu Alkheir, ALA |
| Contributors | Queen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.)) |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Rights | This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner. |
| Relation | Canadian theses |
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