Physical layer security for wireless-powered ambient backscatter cooperative communication networks

Li, X, Jiang, J, Wang, H, Han, C, Chen, G, Du, J, Hu, C and Mumtaz, S ORCID: https://orcid.org/0000-0001-6364-6149, 2023. Physical layer security for wireless-powered ambient backscatter cooperative communication networks. IEEE Transactions on Cognitive Communications and Networking. ISSN 2332-7731

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Abstract

Low power consumption and high spectrum efficiency as the great challenges for multi-device access to Internet-of-Things (IoT) have put forward stringent requirements on the future intelligent network. Ambient backscatter communication (ABcom) is regarded as a promising technology to cope with the two challenges, where backscatter device (BD) can reflect ambient radio frequency (RF) signals without additional bandwidth. However, minimalist structural design of BD makes ABcom security vulnerable in wireless propagation environments. By virtue of this fact, this paper considers the physical layer security (PLS) of a wireless-powered ambient backscatter cooperative communication network threatened by an eavesdropper, where the BD with nonlinear energy harvesting model cooperates with decode-and-forward (DF) relay for secure communication. The PLS performance is investigated by deriving the secrecy outage probability (SOP) and secrecy energy efficiency (SEE). Specifically, the closed-form and asymptotic expressions of SOP are derived as well as the secrecy diversity order for the first time. As an energy-constrained device, balancing power consumption and security is major concern for BD, thus the SEE of the proposed network is studied. The results from numerical analysis show that the performance improvement of SOP and SEE is impacted by system parameters, including transmit power, secrecy rate threshold, reflection efficiency and distance between the source and BD, which provide guidance on balancing security and energy efficiency in ambient backscatter cooperative relay networks.

Item Type:	Journal article
Publication Title:	IEEE Transactions on Cognitive Communications and Networking
Creators:	Li, X., Jiang, J., Wang, H., Han, C., Chen, G., Du, J., Hu, C. and Mumtaz, S.
Publisher:	Institute of Electrical and Electronics Engineers (IEEE)
Date:	26 April 2023
ISSN:	2332-7731
Identifiers:	Number Type 10.1109/tccn.2023.3270425 DOI 1754933 Other
Rights:	© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Divisions:	Schools > School of Science and Technology
Record created by:	Laura Ward
Date Added:	28 Apr 2023 08:07
Last Modified:	28 Apr 2023 08:07
URI:	https://irep.ntu.ac.uk/id/eprint/48840

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