NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Spectrum sensing in cognitive radio networks: the cooperation-processing tradeoff
Wireless Communications & Mobile Computing - Cognitive Radio, Software Defined Radio And Adaptive Wireless Systems
Detection Probability Analysis of Cooperative Spectrum Sensing in Rayleigh Fading Channels
ICIS '09 Proceedings of the 2009 Eigth IEEE/ACIS International Conference on Computer and Information Science
Outage analysis of opportunistic cooperation over Rayleigh fading channels
IEEE Transactions on Wireless Communications
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
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Cognitive radio has been proposed recently as the means to improve spectrum utilization, where the cognitive users (also referred to as secondary users) are permitted to share spectrum resource with the primary user. In this paper, we investigate the spectrum sensing by using cooperative diversity in multiple-user cognitive radio networks. A novel cooperative spectrum sensing scheme based on the best relay selection is proposed to improve the detection performance. We develop the closed-form expressions of detection probability for traditional non-cooperative scheme and the proposed cooperative scheme over Rayleigh fading channels. Numerical results show that our scheme outperforms the traditional non-cooperative scheme in terms of detection probability. Furthermore, the improvement of detection performance increases with the growth of the number of potential users in cognitive radio networks.