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J. Electromagn. Eng. Sci > Volume 10(3); 2010 > Article
Journal of the Korean Institute of Electromagnetic and Science 2010;10(3):190-198.
DOI: https://doi.org/10.5515/JKIEES.2010.10.3.190   
An Analysis of Combining Methods in Cooperative Spectrum Sensing over Rayleigh Fading Channel
Tran Thanh Truc, Hyung-Yun Kong
School of Electrical Engineering, University of Ulsan
This paper evaluates the performance of two methods of spectrum sensing: the linear combining method and the selection combining method which is based on maximum SNR of sensing channel. We proposed a rule for global detection for the purpose of combating hidden terminal problems in spectrum sensing. Our analysis considers a situation when sensing channels experience the non-identically, independently distributed(n.i.d) Rayleigh fading. The average probabilities of global detection in these methods are derived and compared. In the scope of this paper, the reporting channels are assumed to be the AWGN channel with invariant and identical gain during the system's operation.
Key words: Maximum Ratio Combining, Cognitive Radio, Rayleigh Fading, Relay Selection, Cooperative Spectrum Sensing


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