Signature detection for context awareness in cognitive radio networks
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Cognitive Radio (CR) systems are a strong technology for the optimal use of the spectrum due to its characteristics of context awareness and spectrum utilization through the use of a software-defined radio platform. CR devices will be capable of adapt themselves to the environment and frequency band of interest providing reliable communication anywhere and anytime. The methods used by CR devices to detect the available spectrum are grouped in spectrum sensing, and spectrum sharing, but in order to detect the presence of a signal in the band in question, signal signature detection can be used regardless of the kind of service being offered to the primary users in that band. In this chapter we propose a novel signature detection technique that uses Barker sequences and a matched filter to detect the presence of a TV signal, results and performance are also introduced and discussed. © 2012 Springer Science+Business Media Dordrecht.