%0 Journal Article %A Arezumand, Hamid %A Azmi, Paeiz %A Sadeghi, Hamed %T A Low-Complexity Cyclostationary-Based Detection Method for Cooperative Spectrum Sensing in Cognitive Radio Networks %J International Journal of Information and Communication Technology Research %V 3 %N 3 %U http://ijict.itrc.ac.ir/article-1-204-en.html %R %D 2011 %K Cooperative, Cyclostationarity-Based, Low-Complexity Spectrum Sensing, Soft Combination, %X Fast reliable spectrum sensing (SS) is a crucial problem in the cognitive radio systems. To address this issue, cyclostationarity-based detection methods, which are generally more complex but more reliable than energy detection methods, have been proposed. This paper presents a new method to detect the presence of the second-order cyclostationarity in the OFDM-based primary user (PU) signals. The proposed method has a low computational complexity, while it presents a performance close to the well-known GLRT-based Dandawaté-Giannakis's method. Moreover, since the proposed low-complexity method is robust against the noise uncertainty, it can be a good alternative to the energy detection method. We further propose some cooperative spectrum sensing methods to improve the detection performance. Extensive simulation results confirm the superiority of the proposed schemes. %> http://ijict.itrc.ac.ir/article-1-204-en.pdf %P 1-10 %& 1 %! %9 Research %L A-10-27-177 %+ %G eng %@ 2251-6107 %[ 2011