In this paper, we present a two-stage detection scheme using fuzzy logic for spectrum sensing. The first stage consists of the dynamic double-threshold energy detector, whereas the second stage uses of a fuzzy logic system. Fuzzy logic detector utilizes estimated energy and estimated eigenvalue of the signal and gives a decision in confused state. The novelty of the proposed spectrum sensing technique lies in its decision-making capability at individual nodes without adding any overhead to the system in terms of control channel which ultimately reduces the bandwidth consumption. It has been observed from the results that the proposed system yields improved performance in comparison with the conventional two-stage detection schemes. The proposed scheme was also analyzed in cooperative sensing scenario where it outperforms the conventional cooperative spectrum sensing schemes to a considerable extent.

中文翻译：

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认知无线电网络中使用模糊逻辑的两阶段频谱感知

在本文中，我们提出了一种使用模糊逻辑进行频谱检测的两阶段检测方案。第一阶段包括动态双阈值能量检测器，而第二阶段则使用模糊逻辑系统。模糊逻辑检测器利用信号的估计能量和特征值，并在混淆状态下做出决策。所提出的频谱感测技术的新颖之处在于其在各个节点的决策能力，而不会在控制信道方面增加任何系统开销，从而最终减少了带宽消耗。从结果已经观察到，与常规的两阶段检测方案相比，所提出的系统产生了改进的性能。