A fuzzy collaborative spectrum sensing scheme in cognitive radio

Cognitive radio (CR) is a promising technology to solve the challenging spectrum allocation problem. However, to implement CR, spectrum sensing is the groundwork and the precondition. In this paper, a fuzzy collaborative spectrum sensing scheme is proposed. The final sensing decision of the proposed scheme is based on the combination of distributed sensing results of different secondary users (SUs). To improve the reliability of the sensing decision, the combination procedure takes into account the credibility of each SU, which is evaluated using fuzzy comprehensive evaluation at the training stage. The efficiency of the scheme is validated through analysis and simulation.