New PDF release: Cognitive Radio Systems

By Wei Wang

ISBN-10: 9533070218

ISBN-13: 9789533070216

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1. Scheme of the partially cooperative network B Totally Cooperative Network Cognitive users cooperatively transmit each others sensing information, and then send sensing information to the fusion centre. Fusion center Primary user Cognitive user Fig. 2. 2 Distributed Sensing In the case of distributed sensing, cognitive users share information among each other but they make their own decisions as to which part of the spectrum they can use. Distributed sensing is more advantageous in the sense that there is no need for a backbone infrastructure.

1996). Potential games, Games Econ. Behav. 14(1): 124–143. del Coso, A. & Ibars, C. (2009). Achievable rates for the AWGN channel with multiple parallel relays, IEEE Transactions on Wireless Communications, to appear . , Borm, P. & Tijs, S. (1997). ) 42: 193–206. Fuderberg, D. & Tirole, J. (1991). Game Theory, MIT Press. Ghasemi, A. & Sousa, E. (8-11 Nov. 2005, Baltimore, USA). Collaborative spectrum sensing for opportunistic access in fading environments, Proceedings of IEEE Dyspan 2005, pp. 269–278.

Introduction With the rapid growth of wireless applications and services in the recent decade, spectrum resources are facing huge demands. Traditionally, the frequency spectrum is licensed to users by government agencies in a rigid manner where the licensee has the exclusive right to access the allocated band. Recent measurements by Spectrum Policy Task Force (SPTF) within the FCC indicate that, the allocated spectrums are vastly underutilized sporadically and geographically with a high variance in time (McHenry, 2005).

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Cognitive Radio Systems by Wei Wang

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