On February 17, 2009, the transition to digital television broadcasting in the US will finally be complete. All full power television stations will cease their analog (NTSC) broadcasts and switch to digital (ATSC) broadcasts. This transition will free up channels in the VHF and UHF frequencies that can potentially be used for other wireless services and applications. Among the various possible scenarios is one which is being pursued most actively: that of secondary usage of the TV spectrum by unlicensed devices. In order to enable such usage, “cognitive radios” i.e. radios that are aware of their spectral environment and can dynamically access available spectrum without causing interference to the primary user are essential. In this paper we describe recent developments in cognitive radios that make them suitable for use in the television bands.
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Ghosh, M. (2009). Cognitive Radios in Television White Spaces. In: Gerbarg, D. (eds) Television Goes Digital. The Economics of Information, Communication and Entertainment, vol 01. Springer, New York, NY. https://doi.org/10.1007/978-0-387-79978-0_14
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