Springer Science+Business Media
Spectrum sensing plays a significant role in enabling utilization of spectrum holes by unlicensed Secondary Users (SUs) in Cognitive Radio Networks (CRNs). Most of the related work concerning spectrum sensing has focused on sensing carried out by incoming Secondary Users (SUs) aiming at locating spectrum opportunities. However, in order to appropriately protect returning licensed Primary Users (PUs), SUs should continuously perform spectrum sensing during their ongoing transmissions. An important issue associated with the continuous sensing is the False Alarm Rate (FAR), which is defined as the average number of false alarms per unit of time.