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Effects of Noise Power Uncertainty on Energy Detection for Spectrum Sensing  

Lim, Chang-Heon (Pukyong National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.48, no.11, 2011 , pp. 22-27 More about this Journal
Abstract
In spectrum sensing, an energy detector compares the energy of a received signal with a predetermined detection threshold and decides whether a primary user is active or not in a licensed frequency band. Here the detection threshold is related to the noise power level in the band. Most previous works on energy detection have assumed that the noise power is exactly known a priori. However, this assumption does not hold in practice since there may be some uncertainty about the noise power. So it is necessary to investigate its effects on the performance of energy detection for spectrum sensing. In this paper, we analyze the effects using the residue theorem for contour integral and present the associated numerical results.
Keywords
cognitive radio; spectrum sensing; energy detection; hypothesis testing; noise uncertainty;
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Times Cited By KSCI : 1  (Citation Analysis)
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