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The Journal of The Korea Institute of Intelligent Transport Systems Vol.10 No.3 pp.85-94
예측 가능한 신호 환경에서의 스펙트럼 센싱 기법
A Spectrum Sensing Scheme with Unknown Deterministic Signal Environment
Abstract
Spectrum sensing is one of the most important technologies in cognitive radio. Although many studies have considered energy detection technique as the spectrum sensing technique, noise variance in practical systems is difficult to estimate accurately. Thus, in the real system, the probability of false alarm will not be maintained constant. In this paper, with considering that the cognitive radio does not know the primary user's signal, we propose a new spectrum sensing scheme which can operate without the information of noise variance. Through simulations, we show that the proposed scheme can detect spectrum with the condition of unknown noise information and have robustness for the change of noise variance.
