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To utilize the valuable spectrum resources efficiently, cognitive radio is proposed, in which spectrum sensing plays an essential role. In this paper, we propose a novel spectrum sensing scheme to reduce the consumption of wide-band spectrum sensing. Firstly, all potential channels are clustered into highly correlated groups. In addition to the greedy clustering algorithm (GC) discussed in our previous...
Under current popularity of full duplex radio, this paper explores the adaption of energy detector (ED) to full duplex scenario. To improve sensing performance,firstly a correlation based channel estimation algorithm is formulated to cancel out self-interference. We then notice traditional ED has a long delay in finding sensing error. To tackle this problem, sliding window ED is proposed, in which...
This paper analyzes the connectivity of cognitive radio networks. The connectivity of cognitive network which is more consistent with reality is redefined in our article and the closed-form formula of relation between connectivity and density of PUs, density of SUs, and transmission radius of SU is given. Specifically, the impact of correlation of adjacent nodes for connectivity of cognitive radio...
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