The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP URL' above for details on accessing the published version and note that access may require a subscription.
Spectrum sensing is the primary essentiality to monitor the presence of primary user in cognitive radios. Among all the spectrum sensing techniques energy detection is preferable because it is simple and prior knowledge of primary user is not required, but conventional energy detection is not preferable in low SNR regions. In this paper we discuss a cooperative double threshold method with two thresholds which are decided by an uncertainty parameter. In the confusion region we use a weighted sequential energy detection (WSED) method which considers a fixed number of past observations. For making a decision in confusion region, both the current and past observations are weighted and aggregated. Equations for probability of detection and probability of false alarm in Rayleigh channel are derived for the discussed scheme. Numerical results shows that the scheme gives better performance as compared to the conventional method.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.