Science & Engineering Research Support soCiety (SERSC)
Cognitive Radio (CR) has recently been identified as a promising technology to solve the spectrum inefficiency problem. CR users or Secondary Users (SUs) need to sense the presence of Primary Users (PUs) constantly and rapidly to utilize their unused spectrum. However, detection is compromised when a user experiences shadowing or fading effects. In such cases, the user cannot distinguish between an unused band and a deep fade. So, cooperative spectrum sensing is proposed to improve sensing performance. In this paper, the authors analyze the different spectrum sensing schemes with different fusion rules and their comparative behavior has also been studied.