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Secure Transmission of Terahertz Signals with Multiple Eavesdroppers

The terahertz (THz) band is expected to become a key technology to meet the ever-increasing traffic demand for future 6G wireless communications, and a lot of efforts have been paid to develop its capacity. However, few studies have been concerned with the transmission security of such ultra-high-sp...

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Detalles Bibliográficos
Autores principales: He, Yuqian, Zhang, Lu, Liu, Shanyun, Zhang, Hongqi, Yu, Xianbin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9415560/
https://www.ncbi.nlm.nih.gov/pubmed/36014222
http://dx.doi.org/10.3390/mi13081300
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author He, Yuqian
Zhang, Lu
Liu, Shanyun
Zhang, Hongqi
Yu, Xianbin
author_facet He, Yuqian
Zhang, Lu
Liu, Shanyun
Zhang, Hongqi
Yu, Xianbin
author_sort He, Yuqian
collection PubMed
description The terahertz (THz) band is expected to become a key technology to meet the ever-increasing traffic demand for future 6G wireless communications, and a lot of efforts have been paid to develop its capacity. However, few studies have been concerned with the transmission security of such ultra-high-speed THz wireless links. In this paper, we comprehensively investigate the physical layer security (PLS) of a THz communication system in the presence of multiple eavesdroppers and beam scattering. The method of moments (MoM) was adopted so that the eavesdroppers’ channel influenced by the PEC can be characterized. To establish a secure link, the traditional beamforming and artificial noise (AN) beamforming were considered as transmission schemes for comparison. For both schemes, we analyzed their secrecy transmission probability (STP) and ergodic secrecy capacity (ESC) in non-colluding and colluding cases, respectively. Numerical results show that eavesdroppers can indeed degrade the secrecy performance by changing the size or the location of the PEC, while the AN beamforming technique can be an effective candidate to counterbalance this adverse effect.
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spelling pubmed-94155602022-08-27 Secure Transmission of Terahertz Signals with Multiple Eavesdroppers He, Yuqian Zhang, Lu Liu, Shanyun Zhang, Hongqi Yu, Xianbin Micromachines (Basel) Article The terahertz (THz) band is expected to become a key technology to meet the ever-increasing traffic demand for future 6G wireless communications, and a lot of efforts have been paid to develop its capacity. However, few studies have been concerned with the transmission security of such ultra-high-speed THz wireless links. In this paper, we comprehensively investigate the physical layer security (PLS) of a THz communication system in the presence of multiple eavesdroppers and beam scattering. The method of moments (MoM) was adopted so that the eavesdroppers’ channel influenced by the PEC can be characterized. To establish a secure link, the traditional beamforming and artificial noise (AN) beamforming were considered as transmission schemes for comparison. For both schemes, we analyzed their secrecy transmission probability (STP) and ergodic secrecy capacity (ESC) in non-colluding and colluding cases, respectively. Numerical results show that eavesdroppers can indeed degrade the secrecy performance by changing the size or the location of the PEC, while the AN beamforming technique can be an effective candidate to counterbalance this adverse effect. MDPI 2022-08-12 /pmc/articles/PMC9415560/ /pubmed/36014222 http://dx.doi.org/10.3390/mi13081300 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
He, Yuqian
Zhang, Lu
Liu, Shanyun
Zhang, Hongqi
Yu, Xianbin
Secure Transmission of Terahertz Signals with Multiple Eavesdroppers
title Secure Transmission of Terahertz Signals with Multiple Eavesdroppers
title_full Secure Transmission of Terahertz Signals with Multiple Eavesdroppers
title_fullStr Secure Transmission of Terahertz Signals with Multiple Eavesdroppers
title_full_unstemmed Secure Transmission of Terahertz Signals with Multiple Eavesdroppers
title_short Secure Transmission of Terahertz Signals with Multiple Eavesdroppers
title_sort secure transmission of terahertz signals with multiple eavesdroppers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9415560/
https://www.ncbi.nlm.nih.gov/pubmed/36014222
http://dx.doi.org/10.3390/mi13081300
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