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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
Department工业控制网络与系统研究室
Source PublicationIEEE Transactions on Green Communications and Networking
ISSN2473-2400
2017
Volume1Issue:1Pages:29-39
Indexed ByEI
EI Accession number20173704158593
Contribution Rank1
KeywordCognitive Radio Spectrum Sensing Multiple-access Channel Analog Computation Energy Efficiency
AbstractSpectrum 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.
Language英语
Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/21230
Collection工业控制网络与系统研究室
Corresponding AuthorLiang W(梁炜); Yu HB(于海斌)
Affiliation1.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
Recommended Citation
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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