Study of Cooperative Sensing Approach in Cognitive Radio Networks

Radio Spectrum is regarded as a fundamental unit in Wireless communication network, as it plays an important role of transmission medium; and with the advent of technologies dealing with radio spectrum; cognitive radio has emerged as a effective solution to the problem of limited radio spectrum. Cognitive radio uses spectrum sensing to study surrounding environment and to demonstrate the appropriate plan for spectrum sharing.Cooperative sensing is an approach inspectrum sensing which eliminates error in spectrum sensing mechanism by sharing information. However, it is a method which improves detection using spatial diversity to eliminate shadowing, multipath fading and receiver uncertainty issues. This review paper is a simple theoretical study that enlightensfeatures of cooperative sensing approach in cognitive radio.