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The Journal of The Korea Institute of Intelligent Transport Systems Vol.9 No.1 pp.27-33
인지무선 시스템에서 DTV 신호 검출을 위한 FFT 기반의 협력 파일럿 센싱
Effective Cooperative FFT based Pilot Sensing Scheme for Detecting DTV Signals in Cognitive Radio
Abstract
Cognitive radio (CR), which is proposed as a technology that utilizes the frequency resources effectively, has been studied to relive scarcity of the frequency resources. Also, FCC revises the regulation to reuse the TV white spaces for applying CR system and allows to use the TV white spaces by CR devices and use of CR device may be regularized after conversion by DTV in 2009. In order to reuse the TV bands without harmful interference to primary user, correct spectrum sensing should be needed to detect DTV signals that is the primary user in TV bands. In this paper, we detect the DTV signal using FFT-based pilot sensing and cooperative sensing scheme is applied for the reliability of the sensing performance and the accuracy of the detection probability. Also, in order to make the reliable decision, the majority rule is proposed.
