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Based on the service characteristics and the sensing ability for secondary users, a joint optimization scheme of spectrum detection and allocation is investigated to expand the available sensing region and allocate the QoS-specified channels. On the aspect of spectrum detection, due to the available detection index with the global detection metrics, cooperation thresholds are adaptively adjusted to...
In the cooperative spectrum sensing, it is not that the more cooperative sensing nodes are, the better the sensing performance is. How to select suitable sensing nodes to participate in fusion is a key problem in the cooperative spectrum sensing. This paper proposed a new cooperative spectrum sensing algorithm, in which the sensing nodes to participate in fusion is selected according to the reliability...
Accurate spectrum sensing is very important for cognitive radio systems. In the cooperative spectrum sensing, the unreliable nodes will result in deterioration of detection performance. This paper focuses on the spectrum sensing in the case of unreliable nodes and proposes a weighted reliability cooperative spectrum sensing algorithm. In the algorithm, the global fusion center only chooses the cognitive...
In the cooperative spectrum sensing, the bad channel environment where there are a few of malicious nodes, often results in deterioration of detection performance. This paper focuses on the spectrum sensing in the case malicious nodes and proposes an accumulated credibility-based weighted cooperative spectrum sensing algorithm. In the algorithm, the global fusion center weights the local detection...
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