Spectrum Decision in Cognitive Radio

Cognitive radio technology is that the outcome of dynamic spectrum access which allows the unlicensed users to occupy the vacant spectrum of licensed users for his or her communication. Spectrum decision is a fundamental requirement in the successful implementation of cognitive radios which enables the unlicensed users to occupy the best channel out of available channel slots. The proposed decisionmaking scheme is based on the fusion of three key channel parameters i.e. channel idle time, channel occupancy status and channel performance, thereby facilitating the secondary user to occupy the targeted channel without impairing the licensed user’s communication while maintaining its own QoS requirements. Decision structural function is used as an evaluation measure to check the robustness of the proposed scheme. We have also evaluated our method using receiver operating characteristic curve which signifies that our proposed method yields promising results. Keywords—Cognitive Radio,Wireless Network;Secondary User; Spectrum Sensing;Energy Detection