Cognitive Radio (CR) is a recent technology to improve the spectrum availability. Cognitive radio scenario is well explained in this paper. When secondary users fail to realize the white space, either it will cause a serious interference with primary user or a failure to reuse the unoccupied band. Various sensing scheme for the cognitive radio are reviewed and the challenges associated with it. This paper describes signal sensing techniques and their various forms. Further identified issued and research challenges to overcome in future.
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Author Name: Khadeeja Sherbin; Sindhu. V
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Keywords: Spectrum Sensing, Cognitive Radio, Spectrum Hole, Spectrum Sensing Techniques
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EISSN: 2455-5703
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