Cognitive Radio Architecture: A Survey

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. Citation: Khadeeja Sherbin. M, Sindhu. V . "Cognitive Radio Architecture: A Survey." Global Research and Development Journal For Engineering [ERTEE' 19], Adishankara Institute of Engineering and Technology, kalady, Kerala KTU(Kerala Technological University), (March 2019) : pp. 132 - 137.