Cooperative spectrum sensing for cognitive radio networks: Fusion rules performance analysis

Accurate spectrum sensing is highly recommended in interweave cognitive radio systems. In this paper, cooperative spectrum sensing based on censored energy detection is considered in order to enhance the decision accuracy about the availability of the spectrum. The final decision is derived based on fusion rules. Two witnesses, AND and OR fusion rules are detailed, analyzed and compared. Closed forms of the probabilities of detection, false alarm, occupancy and misdetection are derived. Simulations are carried out and showed the coherence between the numerical and analytical results.