Spectrum Sensing Schemes in Cognitive Radio Networks: A Review
نویسندگان
چکیده
Spectrum sensing plays a major role in the cognitive radio networks. An effective spectrum sensing has two fold utility: one hand it prevents primary users or licensed users for significant harmful interference from secondary users or unlicensed users and on the other hand it increases the spectral efficiency. In this paper, a survey of the various spectrum sensing schemes such as transmitter spectrum sensing scheme, interference based spectrum sensing and cooperative spectrum sensing scheme is presented. Advantages, disadvantages, and situation suitability of the each scheme are discussed in this paper. A comparison of the basic sensing scheme in terms of the accuracy and complexity is also done in this paper. Keywords—Spectrum sensing; cognitive radio; energy detection; matched filter detection; cyclostationary feature detection; spectrum efficiency.
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