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Cognitive radio is an intelligent technology designed to help secondary users (SUs) increase their opportunity to access unused spectrum channels while avoiding interference with the primary users. In cognitive radio networks (CRNs), to find the available channels, SUs execute cooperative spectrum sensing and exchange channels-related control information, namely an available channels list (ACL), on...
Cognitive radio (CR) is an intelligent technology designed to help secondary users (SUs) increase access opportunity for unused licensed spectrum channel while avoiding interference to the primary users (PUs). In cognitive radio networks (CRNs), SUs execute cooperative spectrum sensing to find available spectrum channels and exchange those sensed channels-related control information, namely available...
Collaborative sensing is an available technology to increase access opportunity for unused spectrum and avoid interference to the primary users in cognitive radio networks. Due to the complexity of wireless environment and the primary user's location is unknown, the sensing performance will be affected by many unfavorable factors such as multipath fading, shadowing, and so on. Especially, some secondary...
Cognitive radio (CR) is an effective technology to deal with the spectrum scarcity and improve spectrum utilization. The growing small-cell is another effective method to enhance the spectrum efficiency of wireless networks by way of the spatial reuse of frequencies. In this paper, we consider a Multiple Input Multiple Output (MIMO) CR in small-cell networks and propose an efficient algorithm joint...
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