On the performance of THz wireless LOS links through random turbulence channels

Taherkhani, Mehdi; Kashani, Zahra Ghattan; Sadeghzadeh, R. A.

doi:10.1016/j.nancom.2020.100282

Cited by 30 publications

(23 citation statements)

References 44 publications

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“…For vertical or slant paths, C 2 n can depend on the altitude as described in the Hufnagle-Valley Model [19]. However, Naboulsi's model is not designed for the moderate and strong turbulence conditions as experimentally described in [20] and [21]. Also, it does not consider aperture averaging on the receive side and is suitable for plane waves only [17].…”

Section: Signal Attenuation and Multipath Scattering In Atmospheric Turbulencementioning

confidence: 99%

Eavesdropping Risk Evaluation on Terahertz Wireless Channels in Atmospheric Turbulence

Mei

et al. 2021

IEEE Access

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Wireless networks operating at terahertz (THz) frequencies have been proposed as a promising candidate to support the ever-increasing capacity demand, which cannot be satisfied with existing radio-frequency (RF) technology. Besides this, wireless channels in the THz range could be less vulnerable to interceptions because of their high beam directionality and small signal coverage. However, a risk for eavesdropping can still exist due to the multipath effects caused by unintended scattering when the channels operate in outdoor scenarios, such as in rain, snow, atmospheric turbulence, etc. In this work, eavesdropping risks for THz channel passing atmospheric turbulences are evaluated from a physical layer perspective. Secrecy capacity and outage probability of a point-to-point THz wireless channel are derived by considering the multipath scattering effect. Deterministic and probabilistic eavesdropping attacks are assessed. Their dependence on turbulence strength, eavesdropper's position and channel conditions is investigated.INDEX TERMS Terahertz wireless channel, eavesdropping risk, atmospheric turbulence, multipath scattering.

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Section: Signal Attenuation and Multipath Scattering In Atmospheric Turbulencementioning

confidence: 99%

Eavesdropping Risk Evaluation on Terahertz Wireless Channels in Atmospheric Turbulence

Mei

et al. 2021

IEEE Access

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“…which, by applying (31), can be rewritten as in (33), given at the top of the next page. By employing [23, eq.…”

Section: Appendix Proof Of Propositionmentioning

confidence: 99%

Coverage Analysis of Reconfigurable Intelligent Surface Assisted THz Wireless Systems

Boulogeorgos

Alexiou

2021

IEEE Open J. Veh. Technol.

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In this paper, we introduce a theoretical framework for analyzing the performance of multi-reconfigurable intelligence surface (RIS) empowered terahertz (THz) wireless systems subject to turbulence and stochastic beam misalignment. In more detail, we extract a closed-form expression for the outage probability that quantifies the joint impact of turbulence and misalignment as well as the effect of transceivers' hardware imperfections. Our results highlight the importance of accurately modeling both turbulence and misalignment when assessing the performance of multi-RIS-empowered THz wireless systems.

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“…It is mentioned in [2], wireless communication has overall better chances for penetration through obstacles in comparison with FSOs. In [62], it is shown that with increasing gain the BER performance of Terahertz links is much better than the FSO link. Further, the IR and ultraviolet are not considered as safe for human and the Visible Light communication requires the visibility of light at all times.…”

Section: ) Comparison With Mmwave Band Communicationsmentioning

confidence: 99%

MAC Protocols for Terahertz Communication: A Comprehensive Survey

Ghafoor

Boujnah

Rehmani

et al. 2020

IEEE Commun. Surv. Tutorials

106

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Terahertz communication is emerging as a future technology to support Terabits per second link with highlighting features as high throughput and negligible latency. However, the unique features of the Terahertz band such as high path loss, scattering, and reflection pose new challenges and results in short communication distance. The antenna directionality, in turn, is required to enhance the communication distance and to overcome the high path loss. However, these features in combine negate the use of traditional medium access protocols (MAC). Therefore, novel MAC protocol designs are required to fully exploit their potential benefits including efficient channel access, control message exchange, link establishment, mobility management, and line-of-sight blockage mitigation. An in-depth survey of Terahertz MAC protocols is presented in this paper. The paper highlights the key features of the Terahertz band which should be considered while designing an efficient Terahertz MAC protocol, and the decisions which if taken at Terahertz MAC layer can enhance the network performance. Different Terahertz applications at macro and nano scales are highlighted with design requirements for their MAC protocols. The MAC protocol design issues and considerations are highlighted. Further, the existing MAC protocols are also classified based on network topology, channel access mechanisms, and link establishment strategies as Transmitter and Receiver initiated communication. Open challenges and future research directions on Terahertz MAC protocols are also highlighted. Index Terms-Terahertz band, terahertz communication network, terahertz technology, terahertz physical layer, terahertz MAC layer, terahertz channel model, terahertz propagation model, terahertz antenna, terahertz transceivers. I. INTRODUCTION T HE DEMAND for wireless data traffic has increased significantly since the evolution of Internet and Mobile Technology and is projected to exceed Petabytes by 2021 [1].

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On the performance of THz wireless LOS links through random turbulence channels

Cited by 30 publications

References 44 publications

Eavesdropping Risk Evaluation on Terahertz Wireless Channels in Atmospheric Turbulence

Eavesdropping Risk Evaluation on Terahertz Wireless Channels in Atmospheric Turbulence

Coverage Analysis of Reconfigurable Intelligent Surface Assisted THz Wireless Systems

MAC Protocols for Terahertz Communication: A Comprehensive Survey

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