A hybrid double-threshold based cooperative spectrum sensing over fading channels
Article
Vien, Q., Nguyen, H., Trestian, R., Shah, P. and Gemikonakli, O. 2016. A hybrid double-threshold based cooperative spectrum sensing over fading channels. IEEE Transactions on Wireless Communications. 15 (3), pp. 1821-1834. https://doi.org/10.1109/TWC.2015.2496598
Type | Article |
---|---|
Title | A hybrid double-threshold based cooperative spectrum sensing over fading channels |
Authors | Vien, Q., Nguyen, H., Trestian, R., Shah, P. and Gemikonakli, O. |
Abstract | This paper investigates double-threshold based energy detector for cooperative spectrum sensing mechanisms in cognitive wireless radio networks. We first propose a hybrid double-threshold based energy detector (HDTED) to improve the sensing performance at secondary users (SUs) by exploiting both the local binary/energy decisions and global binary decisions feedback from the fusion centre (FC). Significantly, we derive closed-form expressions and bounds for the probabilities of missed detection and false alarm considering a practical scenario where all channel links suffer from Rayleigh fading and background noise. The derived expressions not only show the improved performance achieved with the HDTED scheme but also enable us to analyse the impacts of the number of the SUs and the fading channels on the cooperative spectrum sensing performance. Furthermore, based on the derived bounds, we propose an optimal SU selection algorithm for forwarding the local decisions to the FC, which helps reduce the number of forwarding bits for a lower-complexity signaling. Finally, numerical results are provided to demonstrate the validity of the analytical findings. |
Keywords | Cognitive radio; cooperative spectrum sensing; energy detection; user selection; Rayleigh fading |
Publisher | IEEE |
Journal | IEEE Transactions on Wireless Communications |
ISSN | 1536-1276 |
Electronic | 1558-2248 |
Publication dates | |
Online | 02 Nov 2015 |
08 Mar 2016 | |
Publication process dates | |
Deposited | 19 Apr 2016 |
Accepted | 20 Oct 2015 |
Output status | Published |
Accepted author manuscript | File Access Level Open |
Copyright Statement | Full text: © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works |
Digital Object Identifier (DOI) | https://doi.org/10.1109/TWC.2015.2496598 |
Scopus EID | 2-s2.0-84963600171 |
Web of Science identifier | WOS:000372627500016 |
Language | English |
https://repository.mdx.ac.uk/item/86450
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