Effect of Primary User Traffic on the Performance of Robust and Conventional Goodness of Fit (GOF) Test based Spectrum Sensing Methods in Cognitive Radio

Abstract

In cognitive radio, users of the spectrum are grouped as primary and secondary users. Primary users are license holders and a certain interval of band is assigned to them. On the other hand, secondary users determine the idle frequency intervals which are not used by primary users. To determine whether a spectrum band is idle or in use, various spectrum sensing techniques have been proposed in the literature. In the studies on goodness of fit (GOF) tests, it is assumed that primary user does not change its status during spectrum analysis. However, when the duration of analysis is long, the status of primary user may change. In this study, effect of the primary user traffic on the sensing performance of GOF test based spectrum sensing methods is investigated. According to simulation results, it has been observed that changes in the primary user status adversely affect the sensing performance.