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http://dx.doi.org/10.7236/JIIBC.2013.13.6.87

A Method to enhance the Performance of Spectrum Sensing Under a Random Traffic of Primary User  

Kong, Hyung-Yun (School of Electrical Engineering, University of Ulsan)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.13, no.6, 2013 , pp. 87-92 More about this Journal
Abstract
This paper focuses on analyzing the effects of primary user (PU) signal arrival on the local spectrum sensing performance. The probability for signal arrival at a sample in the sensing time is uniformly distributed in the sensing time. We first analyze the main factor that causes the degradation in the detection results in the conventional energy detection (CED) under the uniformly random arrival of the PU-signal. Thus we propose an approach in order to enhance the detection performance, in which an estimator which detects the arrival of the PU signal cooperates with a composite energy detection. The mathematical analysis and numerical simulation has validated the outperformance of the proposed approach compared to the CED.
Keywords
Cognitive Radio; estimation; composite detection; spectrum sensing; UMP test;
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