An enhanced cooperative spectrum sensing scheme based on evidence theory and reliability source evaluation in cognitive radio context

Authors:
Nhan Nguyen-Thanh;Insoo Koo
Affiliations:
University of Ulsan, South Korea;University of Ulsan, South Korea
Venue:
IEEE Communications Letters
Year:
2009

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Abstract

This letter proposes an enhanced scheme for co-operative spectrum sensing which utilizes the signal to noise ratios to evaluate the degree of reliability of each local spectrum sensing terminal on a distributed Cognitive Radio network. The terminals' reliability weight is applied to adjust its sensing data more accuratly before making fusion by Dempter-Shafer theory of evidence. Simulation results show that significant improvement of the cooperative spectrum sensing gain is achieved by our scheme.