I3S: Intelligent Spectrum Sensing Scheme for Cognitive Radio Networks

Reliable spectrum sensing is one of the most crucial aspects for the successful deployment of Cognitive Radio (CR) technology. For CR, it is not possible to transmit on a licensed band and sense it simultaneously, therefore sensing must be interleaved with transmission. Spectrum sensing in CR is challenged by a number of uncertainties, which degrade the sensing performance and in turn require much more time to achieve the targeted sensing efficiency. Hence, the authors propose a spectrum sensing scheme which obtains reliable results with less mean detection time. First, the scheme deter-mines a better matched filter, or a combination of energy and cyclo-stationary detectors based on the power and band of interest.