A Survey of Cooperative Spectrum Sensing in Cognitive Radio Networks

Abstract

The spectrum sensing is the base line on which the whole process of cognitive radio works. It has raised new facets for cognitive radio and many opportunistic spectrum access approaches. To avoid the interference with the licensed users and determining the accessible spectrum for increasing the spectrum’s usage is its pivotal task of cognitive radio. Generally detection performance is compromised with receiver uncertainty, multipath fading and shadowing issues and an effective method to alleviate the effect of these issues is the cooperative spectrum sensing. This paper provides the introduction to spectrum sensing, its techniques, cooperative spectrum sensing, and System requisites for cooperative sensing, its advantages and disadvantages, and elements of cooperative spectrum sensing and further describes various research area. Finally, this paper concludes that cooperative sensing becomes crucial if the network all together is to prevent interference with each primary user.