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Double Threshold Spectrum Sensing Methods in Spectrum-Scarce Vehicular Communications

Hill, Ellen; Sun, Hongjian

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Authors

Ellen Hill



Abstract

Spectrum scarcity is a growing problem that will affect vehicular communications. Cognitive radio is an effective solution, but requires a robust sensing mechanism that comes with a large overhead; this additional sensing data could be detrimental to a system already lacking in bandwidth. This paper proposes novel ways of limiting sensing overhead using a cooperative mechanism with an adjustable double threshold (DTH). Based on a sliding variable, the threshold can react to changes in the environment to provide the required primary user detection and false alarm probabilities, while limiting the number of vehicles reporting sensing data. Three new DTHs have been proposed: detection-based DTH, decision-based DTH, and independent-threshold DTH. Each has unique properties that make it suited for different environments. Simulations were run on all proposed thresholds to test their validity and endurance under environmental changes. The results indicate that the double thresholds would greatly benefit high-contention, dense vehicular networks.

Citation

Hill, E., & Sun, H. (2018). Double Threshold Spectrum Sensing Methods in Spectrum-Scarce Vehicular Communications. IEEE Transactions on Industrial Informatics, 14(9), 4072-4080. https://doi.org/10.1109/tii.2018.2816580

Journal Article Type Article
Acceptance Date Feb 27, 2018
Online Publication Date Mar 29, 2018
Publication Date Sep 30, 2018
Deposit Date Feb 27, 2018
Publicly Available Date Feb 28, 2018
Journal IEEE Transactions on Industrial Informatics
Print ISSN 1551-3203
Electronic ISSN 1941-0050
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 14
Issue 9
Pages 4072-4080
DOI https://doi.org/10.1109/tii.2018.2816580

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