Cooperative spectrum sensing with two‐stage reporting for cognitive radio networks
Jaewoo So · Electronics Letters · 2015
A new cooperative spectrum sensing (CSS) scheme with two‐stage reporting is proposed so as to improve the throughput of secondary users (SUs) through reducing the reporting overhead. In the proposed scheme, the reporting process of the SUs is divided into two stages (a dedicated reporting stage and a contention‐based reporting stage) and the fusion centre determines the presence of primary users through combining the sensing results successfully received in the two reporting stages by using the k ‐out‐of‐ N rule. Simulation results demonstrate that the proposed scheme significantly outperforms conventional CSS schemes based on the OR rule and the k ‐out‐of‐ N rule.