Limitation on Partitioning of Probability Space in Entropy Based Detection for Spectrum Sensing in Cognitive Radio Networks

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Provided by: Creative Commons
Topic: Mobility
Format: PDF
The limited available spectrum and the inefficiency in the spectrum usage lead to the requirement for a new communication paradigm to exploit the existing wireless spectrum opportunistically. This new paradigm is the Cognitive Radio Networks (CRNs). However, the existing spectrum sensing techniques being envisaged for detecting the presence of primary users in CRN has a fundamental limitation and that is, sensitivity to noise uncertainty. Noise uncertainty rapidly deteriorates the performance of traditional detectors such as matched filters, energy detectors and even cyclostationary detectors.
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