Abstract
For the past few decades, the use of wireless communication devices have exponentially increased and invaded all domains. And the limited amount of spectrum bands can possibly cause an overcrowded or interference in communication between different users. The implementation of Cognitive Radio in the network can successfully deal with the huge demand and the lack of wireless spectrum. Cognitive radio energy detection is a famous method used to sense the state of the primary user PU. In this study, cooperative spectrum sensing together with double threshold have been used. Two thresholds were considered and compared to a test statistic an accordingly a decision regarding the presence and absence of the primary user is made. The simulation results shows that during cooperative sensing the proposed double threshold method performs better than both energy detection and conventional double threshold detection methods, by considering different parameters such as SNR, number of samples, probabilities of detection and false alarm.
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