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Energy-Efficiency Maximization for Cooperative Spectrum Sensing in Cognitive Sensor Networks
Zheng M(郑萌); Chen, Lin; Liang W(梁炜); Yu HB(于海斌); Wu, Jinsong
作者部门工业控制网络与系统研究室
关键词Cognitive Radio Spectrum Sensing Multiple-access Channel Analog Computation Energy Efficiency
发表期刊IEEE Transactions on Green Communications and Networking
ISSN2473-2400
2017
卷号1期号:1页码:29-39
收录类别EI
EI收录号20173704158593
产权排序1
摘要Spectrum sensing is the prerequisite of opportunistic spectrum access in cognitive sensor networks (CSNs) as its reliability determines the success of transmission. However, spectrum sensing is an energy-consuming operation that needs to be minimized for CSNs due to resource limitations. This paper considers the case where the cognitive sensors cooperatively sense a licensed channel by using the CoMAC-based cooperative spectrum sensing (CSS) scheme to determine the presence of primary users. Energy efficiency (EE), defined as the ratio of the average throughput to the average energy consumption, is a very important performance metric for CSNs. We formulate an EE-maximization problem for CSS in CSNs subject to the constraint on the detection performance. In order to address the non-convex and non-separable nature of the formulated problem, we first find the optimal expression for the detection threshold and then propose an iterative solution algorithm to obtain an efficient pair of sensing time and the length of the modulated symbol sequence. Simulations demonstrate the convergence and optimality of the proposed algorithm. It is also observed in simulations that the combination of the CoMAC-based CSS scheme and the proposed algorithm yields much higher EE than conventional CSS schemes while guaranteeing the same detection performance.
语种英语
文献类型期刊论文
条目标识符http://ir.sia.cn/handle/173321/21230
专题工业控制网络与系统研究室
通讯作者Liang W(梁炜); Yu HB(于海斌)
作者单位1.State Key Laboratory of Robotics, Shenyang 110016, China
2.Key Laboratory of Networked Control Systems, Chinese Academy of Sciences, Shenyang 110016, China
3.Laboratoire de Recherche en Informatique, University of Paris-Sud XI, Orsay, 91405, France
4.Department of Electrical Engineering, Universidad de Chile-ao, Santiago, 837045, Chile
推荐引用方式
GB/T 7714
Zheng M,Chen, Lin,Liang W,et al. Energy-Efficiency Maximization for Cooperative Spectrum Sensing in Cognitive Sensor Networks[J]. IEEE Transactions on Green Communications and Networking,2017,1(1):29-39.
APA Zheng M,Chen, Lin,Liang W,Yu HB,&Wu, Jinsong.(2017).Energy-Efficiency Maximization for Cooperative Spectrum Sensing in Cognitive Sensor Networks.IEEE Transactions on Green Communications and Networking,1(1),29-39.
MLA Zheng M,et al."Energy-Efficiency Maximization for Cooperative Spectrum Sensing in Cognitive Sensor Networks".IEEE Transactions on Green Communications and Networking 1.1(2017):29-39.
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