Cooperative IDED in a medium-traffic primary network over Rayleigh-faded sensing channels

Abstract

In a medium-traffic primary network, primary user (PU) changes its state (either idle or active) at most once during a frame period, resulting in the performance degradation of the secondary network. In this work, we evaluate the performance of the proposed improved double-threshold energy detector (IDED) in the case of cooperative spectrum sensing (CSS) when the secondary users (SUs) suffer from a medium-traffic primary network over Rayleigh-faded sensing and imperfect reporting channels. Numerical results show that the IDED outperforms conventional methods.