S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Others_전기·정보공학부
Hard Decision Combining-based Cooperative Spectrum Sensing in Cognitive Radio Systems
- Lee, Seung-Hwan; Oh, Dong-Chan; Lee, Yong-Hwan
- Issue Date
- IWCMC'09. Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly, pp. 906-910, 2009
- 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.