Cooperative Spectrum Sensing over Rayleigh Fading Channel in Cognitive Radio

Abstract- Cognitive radio is a novel technology that can potentially improve the utilization efficiency of the radio spectrum. Spectrum sensing is the key component of cognitive radio technology. However, detection is compromised when a user experiences shadowing or fading effects. In such cases, user cannot distinguish between an unused band and a deep fade. Thus, cooperative spectrum sensing is proposed to optimize the sensing performance. We focus performance of cooperative spectrum sensing over Rayleigh fading channel in Cognitive Radio. This paper presents a simulation comparison of Rayleigh fading with non-fading AWGN based on hard fusion AND, OR and MAJORITY rules. Comparing the AWGN curve with Rayleigh fading, we observe that spectrum sensing is harder in presence of Rayleigh. We also observe that the OR rule has the better performance than AND and MAJORITY rule. Furthermore, spectrum sensing in AWGN non-fading has the better results than Rayleigh.