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Asian Journal of Scientific Research
Year: 2015  |  Volume: 8  |  Issue: 3  |  Page No.: 333 - 341

Enrichment of Adaptive Threshold in Cognitive Radio

J. Avila and K. Thenmozhi    

Abstract: Cognitive radio is the technology that helps overcome the problem of scarcity in a spectrum. It has its application in empowering a secondary user to gain entry into the spectrum. This admittance is because of detection of unoccupied part of the spectrum. It can boost up the spectrum utilization. The sensing technique utilizes the energy detection method, one of the many available. Being the simplest form, it checks the spectrum for empty slots by comparing the energy present with a predefined threshold. The result of this is not satisfactory under noisy conditions. To enrich the detection; the fixed threshold should be made differential i.e., adaptive or other kind of threshold should be employed. In this work with simulation results it has been proved that detection is better with adaptive threshold and further enhanced by the incorporation of multiple energy detectors.

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