Co-operative spectrum sensing in cognitive radio under Rayleigh fading channel

Spectrum sensing is the most appropriate method performed by cognitive radio for the efficient utilization of RF spectrum without any harmful interference to the primary users. In this paper, we propose various spectrum sensing technique. Based on spectrum sensing, cooperative sensing is done over various spectrum sensing technique to overcome the problem of miss detection and false alarm which is occurring using individual node. Cooperative spectrum sensing gives admirable performance. In CSS, multiple cognitive radio users sense the vacant spectrum and send their decision to fusion center and then final decision are made by the fusion center. This paper studies the cooperative spectrum sensing scheme as means of optimizing the sensing performance in Rayleigh channels. Probability of detection vs. SNR curve is plotted while generating signal by considering different values of false alarm. After that probability of miss detection versus probability of false alarm curve is generated. All the performance has been evaluated using MATLAB environment and giving satisfactory results.