Sensing Nodes Selective Fusion Scheme of Spectrum Sensing in Spectrum-Heterogeneous Cognitive Wireless Sensor Networks

Sensing Nodes Selective Fusion Scheme of Spectrum Sensing in Spectrum-Heterogeneous Cognitive Wireless Sensor Networks
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频谱异构认知无线传感器网络中频谱感知感知节点选择性融合方案

DOI:
10.1109/jsen.2017.2760925
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发表时间:
2018
影响因子:
4.3
通讯作者:
Liming Yuan
Liming Yuan
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Zhi Zhang;Xianbin Wen;Haixia Xu;Liming Yuan

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提出了一种新的基于时空机会检测的频谱感知方案。为了验证该方法的实用性和有效性,提出了一种更加真实的二维认知无线传感器网络拓扑模型,其中主信号发射机在每次迭代时随机分布在给定的感知区域内。提出的2-D传感节点选择性融合方案包括三个主要的感知步骤:所有无线传感器节点的非合作频谱感知,位置估计,并选择传感节点的决策融合。另一件需要注意的事情是CWSN中的能量限制。为了节省更多的能量,传感器节点的选择过程中使用的能量充足,以解决直接传输到融合中心的能量消耗太多的问题。仿真结果表明,该方案不仅能有效地处理时空二维感知环境中的频谱异构问题,而且在能量消耗较小的情况下,具有良好的检测性能。
A new spectrum sensing scheme based on spatial-temporal opportunity detection is proposed in this paper. To verify the practicability and validity of the method, we proposed a more real 2-D cognitive wireless sensor network (CWSN) topology model, where the primary signal transmitter is distributed in a given sensing area randomly at each iteration. The proposed 2-D sensing nodes selective fusion scheme consists of three main sensing steps: non-cooperative spectrum sensing for all wireless sensor nodes, location estimation, and the decision fusion of selected sensing nodes. One other thing to note is the limitation of energy in CWSN. To save more energy, a sensing nodes selection procedure for energy sufficiency is used to address the problem of too much energy consumption of direct transmissions to the fusion center. Simulation results show that the proposed scheme not only has a desirable property to process the spectrum-heterogeneous problem in spatial-temporal 2-D sensing environment but shows satisfactory detection performance with less energy consumption as well.
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