1 Department of Electronic Systems, The Technical Faculty of IT and Design, Aalborg University, VBN2 Networking and Security, The Technical Faculty of IT and Design, Aalborg University, VBN3 CTIF - Section, The Technical Faculty of IT and Design, Aalborg University, VBN4 MassM2M, The Technical Faculty of IT and Design, Aalborg University, VBN5 IT/IST, Technical University of Lisbon6 Center for TeleInFrastructure, The Technical Faculty of IT and Design, Aalborg University, VBN
Spectrum sensing, the cornerstone of the Cognitive Radio paradigm, has been the focus of intensive research, from which the main conclusion was that its performance can be greatly enhanced through the use of cooperative sensing schemes. In this paper we analyze the performance of a cooperative spectrum sensing scheme, by measuring the perceived capacity limits introduced by the use of data fusion on cooperative sensing schemes. The analysis is supported by evaluation metrics which account for the perceived capacity limits. The analysis is performed along the data fusion chain, comparing several scenarios encompassing different degree of environment correlation between the cluster nodes, number of cluster nodes and sensed channel occupation statistics. Through this study we motivate that to maximize the perceived capacity by the cooperative spectrum sensing, the use of data fusion needs to be performed in a fractioned way, i.e. the that fusion must be done between subsets of the nodes in a cluster.
8th International Conference on Communications (comm), 2010, 2010, p. 497-502
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8th International Conference on Communications, COMM 2010