In this paper, author consider cooperative spectrum sensing in order to optimize the sensing performance and focus on energy detection for spectrum sensing and find that the optimal fusion rule is the half-voting rule. Next, the optimal detec

In this paper we uate the performance of cooperative spectrum sensing (CSS) where each cognitive radio (CR) employs an improved energy detector (IED) with multiple antennas and uses selection combining (SC) for detecting the primary user (PU) in