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Threshold Determination Methods for Cognitive Radio in Real DTV Bandwidth  

Kim, Seung Jong (LS산전(주))
Lee, Sun Yui (광운대학교 전파공학과 유비쿼터스 통신 연구실)
Kim, Jin Young (광운대학교 전파공학과 유비쿼터스 통신 연구실)
Publication Information
Journal of Satellite, Information and Communications / v.9, no.1, 2014 , pp. 22-27 More about this Journal
Abstract
In this paper, we analyzed performance of FFT based on pilot sensing scheme for DTV signal in fading environments. In order to detect the present and absent for advanced television system committee digital television (ATSC DTV), a pilot detection scheme based on FFT is employed. Also, these signals are applied to each fading environment. For evaluating the spectrum sensing performance, detection probability is derived. When threshold is decided, we refer to constant false alarm rate (CFAR) scheme. From simulation results, it is confirmed that the spectrum sensing performance is improved as increase of the false alarm rate. The result of this paper can be applied to implement the spectrum sensing part of cognitive radio (CR) systems.
Keywords
ATSC DTV; CFAR scheme; energy detection; spectrum sensing;
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