Hard decision combining-based cooperative spectrum sensing in cognitive radio systems

Authors:
Seung-Hwan Lee;Dong-Chan Oh;Yong-Hwan Lee
Affiliations:
Seoul National University, Kwanak, Seoul, Korea;Seoul National University, Kwanak, Seoul, Korea;Seoul National University, Kwanak, Seoul, Korea
Venue:
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Year:
2009

Citing 2
Cited 0

Spectrum sensing in cognitive radio networks: the cooperation-processing tradeoff

Wireless Communications & Mobile Computing - Cognitive Radio, Software Defined Radio And Adaptive Wireless Systems
Cooperative Spectrum Sensing in Cognitive Radio, Part I: Two User Networks

IEEE Transactions on Wireless Communications

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Abstract

In this paper, we propose a cooperative spectrum sensing scheme to maximize the detection probability in cognitive radio systems. We first analytically derive a closed-form expression for the detection and false alarm probability in terms of the number of cooperating users, and then determine the number of cooperating users that maximizes the detection probability for a given false alarm probability. It is shown that the detection probability of cooperative sensing is maximized when the cooperation is performed among users with high signal-to-noise power ratio and interference-to noise-power ratio. Finally, the analytic results are verified by computer simulation.