A survey of cluster-based cooperative spectrum sensing in cognitive radio networks

Cooperative spectrum sensing plays a very important role in the research of cognitive network due to its ability on improving sensing performance especially in the fading and shadowing channel. Combining the clustering technique, cooperative spectrum sensing can improve the performance and reduce the computational cost. In recent years, many methods of cooperative spectrum sensing have been proposed based on the clustering technique, which can be classified into 3 categories. In this paper, we provide a review of cluster-based cooperative spectrum sensing and introduce the existing methods.