NDLI: Hybrid cooperative spectrum sensing scheme based on spatial–temporal correlation in cognitive radio enabled VANET

Content Provider	IET Digital Library
Author	Li, Xi Song, Tiecheng Zhang, Yueyue Chen, Guojun Hu, Jing
Abstract	Cognitive radio enabled vehicular ad-hoc networks (CR-VANETs) are one of the promising architectures in the future vehicular ad-hoc networks. In this study, the joint spatial–temporal correlation is exploited to improve decision accuracy of cooperative spectrum sensing (CSS) while reducing overhead introduced by cooperation in the CR-VANETs. Firstly, a theoretical method is presented to analyse the impact of spatial–temporal correlation on cooperative sensing performance when using soft combining in the CR-VANET. Then, the expression of the optimal probability of detection with respect to spatial–temporal correlation is given for a target probability of false alarm by employing likelihood ratio test. Additionally, the user selection problem is formulated as an efficient double-threshold optimisation problem by considering both sensing accuracy and stability to achieve the optimal probability of detection. Finally, a hybrid CSS scheme based on spatial–temporal correlation is designed for the CR-VANET. Simulation results reveal that the proposed scheme could achieve significant sensing performance gain by selecting a subset of secondary users for combination, and could reduce user selection frequency by employing spatial–temporal diversity.
Starting Page	36
Ending Page	44
Page Count	9
ISSN	17518628
Volume Number	13
e-ISSN	17518636
Issue Number	Issue 1, Jan (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/13/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2018.5667
Journal	IET Communications
Publisher Date	2018-09-20
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Cognitive Radio Cognitive Radio Enabled Vehicular Ad-hoc Network Cooperative Communication Correlation Theory CR-VANET Diversity Reception Double-threshold Optimisation Problem Hybrid Cooperative Spectrum Sensing Scheme Hybrid CSS Scheme Legislation, Frequency Allocation And Spectrum Pollution Likelihood Ratio Testing Mobile Radio System Optimisation Optimisation Technique Probability Radio Spectrum Management Signal Detection Spatial–temporal Correlation Spatial–temporal Diversity Stability Statistics User Selection Problem Vehicular Ad Hoc Network
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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