On the Physical Layer Security of UAV-Aided Backscatter Communications

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2023
Major/Subject
Mcode
Degree programme
Language
en
Pages
5
Series
IEEE WIRELESS COMMUNICATIONS LETTERS
Abstract
In this letter, we investigate the issue of physical layer security in unmanned aerial vehicle (UAV)-assisted backscatter communication. The scenario involves a single UAV, a single passive backscatter device (BD), in the presence of a single eavesdropper (ED) attempting to intercept the backscattered information from the BD. To counteract the ED’s efforts, we propose an artificial noise (AN) injection scheme to degrade the ED link. We aim to maximize the secrecy rate of the BD by optimizing three key factors: the UAV’s hovering position, the power allocation factor, and the reflection coefficient of the BD. For this system setting, we derive the secrecy rate and formulate an optimization problem to optimize these variables. Due to the non-convex nature of the problem, we design an iterative algorithm based on the alternating optimization (AO) algorithm for maximizing the secrecy rate. Additionally, we provide insights into the impact of various system parameters on the overall performance. Notably, we demonstrate that the power allocation factor and the hovering altitude of the UAV play important roles for achieving secure communication.
Description
Publisher Copyright: IEEE
Keywords
artificial noise (AN), Autonomous aerial vehicles, Backscatter, backscatter communications, Internet of Things, Optimization, Physical layer security, physical layer security, Reflection coefficient, Resource management, Unmanned aerial vehicle (UAV)
Other note
Citation
Rao , B , Hu , J , Al-nahari , A , Yang , K & Jantti , R 2023 , ' On the Physical Layer Security of UAV-Aided Backscatter Communications ' , IEEE WIRELESS COMMUNICATIONS LETTERS . https://doi.org/10.1109/LWC.2023.3324914