Secure Transmission for Thz-Empowered Ris-Assisted Non-Terrestrial Networks

dc.authorid Chen, Gaojie/0000-0003-2978-0365
dc.authorid Tafazolli/0000-0002-6062-8639
dc.authorwosid Chen, Gaojie/AFL-8747-2022
dc.authorwosid Tafazolli/AAF-8263-2019
dc.contributor.author Yuan, Jing
dc.contributor.author Panayırcı, Erdal
dc.contributor.author Chen, Gaojie
dc.contributor.author Wen, Miaowen
dc.contributor.author Tafazolli, Rahim
dc.contributor.author Panayırcı, Erdal
dc.contributor.other Electrical-Electronics Engineering
dc.date.accessioned 2023-10-19T15:11:56Z
dc.date.available 2023-10-19T15:11:56Z
dc.date.issued 2023
dc.department-temp [Yuan, Jing] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510641, Peoples R China; [Chen, Gaojie; Tafazolli, Rahim] Univ Surrey, Inst Commun Syst, 5GIC, Guildford GU2 7XH, England; [Chen, Gaojie; Tafazolli, Rahim] Univ Surrey, Inst Commun Syst, 6GIC, Guildford, England; [Wen, Miaowen] Guangdong Prov key Lab Short Range Wireless Detect, Guangzhou, Peoples R China; [Panayirci, Erdal] Kadir Has Univ, Dept Elect & Elect Engn, TR-34083 Istanbul, Turkiye en_US
dc.description.abstract The non-terrestrial networks (NTNs) are recognized as a key component to provide cost-effective and high-capacity ubiquitous connectivity in the future wireless communications. In this paper, we investigate the secure transmission in a terahertz (THz)-empowered reconfigurable intelligent surface (RIS)-assisted NTN (T-RANTN), which is composed of a low-Earth orbit satellite transmitter, an RIS-installed high-altitude platform (HAP) and two unmanned aerial vehicle (UAV) receivers, only one of which is trustworthy. An approximate ergodic secrecy rate (ESR) expression is derived when the atmosphere turbulence and pointing error due to the characteristics of THz as well as the phase errors resulting from finite precision of RIS and imperfect channel estimation are taken into account simultaneously. Furthermore, according to the statistical and perfect channel state information of the untrustworthy receiver, we optimize the phase shifts of RIS to maximize the lower bound of secrecy rate (SR) and instantaneous SR, respectively, by using semidefinite relaxation method. Simulation results show that both the approximate expression for the ESR and the optimization algorithms are serviceable, and even when the jitter standard variance of the trustworthy receiver is greater than that of the untrustworthy one, a positive SR can still be guaranteed. en_US
dc.description.sponsorship Guangdong Basic and Applied Basic Research Foundation [2021B1515120067]; National Natural Science Foundation of China [61871190] en_US
dc.description.sponsorship This work was supported in part by Guangdong Basic and Applied Basic Research Foundation under Grant 2021B1515120067 and in part by the National Natural Science Foundation of China under Grant 61871190. The review of this article was coordinated by Prof. Yiqing Zhou. en_US
dc.identifier.citationcount 3
dc.identifier.doi 10.1109/TVT.2022.3229409 en_US
dc.identifier.endpage 6000 en_US
dc.identifier.issn 0018-9545
dc.identifier.issn 1939-9359
dc.identifier.issue 5 en_US
dc.identifier.scopus 2-s2.0-85144786189 en_US
dc.identifier.scopusquality Q1
dc.identifier.startpage 5989 en_US
dc.identifier.uri https://doi.org/10.1109/TVT.2022.3229409
dc.identifier.uri https://hdl.handle.net/20.500.12469/5283
dc.identifier.volume 72 en_US
dc.identifier.wos WOS:000991849700035 en_US
dc.identifier.wosquality Q1
dc.khas 20231019-WoS en_US
dc.language.iso en en_US
dc.publisher IEEE-Inst Electrical Electronics Engineers Inc en_US
dc.relation.ispartof Ieee Transactions on Vehicular Technology en_US
dc.relation.publicationcategory Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı en_US
dc.rights info:eu-repo/semantics/openAccess en_US
dc.scopus.citedbyCount 28
dc.subject Discrete Phase-Shifts En_Us
dc.subject Performance Analysis En_Us
dc.subject Aided Communications En_Us
dc.subject Outage Probability En_Us
dc.subject Intelligent En_Us
dc.subject Communication En_Us
dc.subject Optimization En_Us
dc.subject Systems En_Us
dc.subject Robust En_Us
dc.subject Model En_Us
dc.subject Receivers en_US
dc.subject Low earth orbit satellites en_US
dc.subject Discrete Phase-Shifts
dc.subject Satellite broadcasting en_US
dc.subject Performance Analysis
dc.subject Security en_US
dc.subject Aided Communications
dc.subject Terrestrial atmosphere en_US
dc.subject Outage Probability
dc.subject Atmospheric modeling en_US
dc.subject Intelligent
dc.subject Satellites en_US
dc.subject Communication
dc.subject Reconfigurable intelligent surface (RIS) en_US
dc.subject Optimization
dc.subject non-terrestrial networks (NTNs) en_US
dc.subject Systems
dc.subject ergodic secrecy rate (ESR) en_US
dc.subject Robust
dc.subject phase error en_US
dc.subject Model
dc.subject pointing error en_US
dc.title Secure Transmission for Thz-Empowered Ris-Assisted Non-Terrestrial Networks en_US
dc.type Article en_US
dc.wos.citedbyCount 21
dspace.entity.type Publication
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