A hybrid double-threshold based cooperative spectrum sensing over fading channels

Vien, Quoc-Tuan ORCID: https://orcid.org/0000-0001-5490-904X, Nguyen, Huan X., Trestian, Ramona, Shah, Purav and Gemikonakli, Orhan ORCID: https://orcid.org/0000-0002-0513-1128 (2016) A hybrid double-threshold based cooperative spectrum sensing over fading channels. IEEE Transactions on Wireless Communications, 15 (3). pp. 1821-1834. ISSN 1536-1276

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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.

Item Type: Article
Additional Information: Date of Publication: 02 November 2015
Research Areas: A. > School of Science and Technology > Computer and Communications Engineering
Item ID: 19399
Notes on copyright: 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
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Depositing User: Quoc-Tuan Vien
Date Deposited: 19 Apr 2016 16:18
Last Modified: 09 Jul 2019 14:33
URI: https://eprints.mdx.ac.uk/id/eprint/19399

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