Variable-Bandwidth Model and Capacity Analysis for Aerial Communications in the Terahertz Band

Saeed, Akhtar; Gürbüz, Özgür; Bicen, A. Ozan; Akkaş, Mustafa Alper

doi:10.1109/jsac.2021.3071831

Cited by 32 publications

(28 citation statements)

References 42 publications

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“…As discussed in Section 1, THz waves experience a dominant water vapor absorption gain in addition to the free space spread gain. Besides, the Beam Misalignment (BM) fading and Multipath (MP) fading also contribute to the overall gain obtained as follows [12,38]:…”

Section: Capacity Of Thz Communication Among Dronesmentioning

confidence: 99%

“…A THz band offers huge bandwidth, favorable for very high data rate ©International Telecommunication Union, 2021 applications, while at the same time promises massive antenna gains due to shorter wavelengths [9,10]. However, THz communications are restricted by the absorption loss, which is highest at the sea-level, as the atmospheric gas concentration is at the maximum [11,12]. Consequently, THz communications have been studied mainly for short transmission distances at the sea-level, such as for on-chip communications [13] or for connecting data centers within up to 10 m [14].…”

Section: Introductionmentioning

confidence: 99%

“…high altitude UAVs and satellites), the entire THz band (0.75-10 THz) becomes feasible as a single transmission window, which is about 9.25 THz wide. In our subsequent work [12], we have proposed an alternative channel model for THz communications, where, by taking the colored nature of noise Power Spectral Density (PSD) into account, the commonly lat bands in path loss (gain) and noise PSD are determined for the THz spectrum (0.75-10 THz), and a variable bandwidth capacity computation method is proposed as an alternative to the standard capacity computation. Our extensive capacity analysis of the same four aerial scenarios has shown that under fading channel conditions, the ergodic capacity at the sea-level is enhanced by an order of magnitude for the drones hovering at 100 m altitude supporting multiple Tbps at a range of 10 m, whereas 10s of Tbps are realizable among jet planes (10 km altitude) and the high altitude UAVs (16 km altitude), and multitude of 100s of Tbps are also achievable for inter-satellite links (also cubesats) at a range of 1 km.…”

Section: Introductionmentioning

confidence: 99%

“…Our extensive capacity analysis of the same four aerial scenarios has shown that under fading channel conditions, the ergodic capacity at the sea-level is enhanced by an order of magnitude for the drones hovering at 100 m altitude supporting multiple Tbps at a range of 10 m, whereas 10s of Tbps are realizable among jet planes (10 km altitude) and the high altitude UAVs (16 km altitude), and multitude of 100s of Tbps are also achievable for inter-satellite links (also cubesats) at a range of 1 km. In both works [11,12], it is concluded that the THz communications is highly viable for non-terrestrial communications. Motivated by our earlier analyses for THz communications among aerial vehicles in [11,12], in this survey, we review THz band communications and sensing for drone networks, more speci ically for DSNs and we highlight the prospects.…”

Section: Introductionmentioning

confidence: 99%

“…In both works [11,12], it is concluded that the THz communications is highly viable for non-terrestrial communications. Motivated by our earlier analyses for THz communications among aerial vehicles in [11,12], in this survey, we review THz band communications and sensing for drone networks, more speci ically for DSNs and we highlight the prospects. First, we present applications of THz-enabled DSNs.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Terahertz band communications as a new frontier for drone networks

Saeed¹,

Gürbüz²,

Akkaş³

et al. 2021

ITU-J FET

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Terahertz band (0.1-10 THz) communications is one of the candidates for 6G systems due to intrinsic massive bandwidth and data rate support. Having demonstrated the significant potential of THz band at various atmospheric altitudes, in this article, we discuss the prospects of THz communications for drone networks, more specifically, for Drone Sensor Networks (DSNs). For 6G non-terrestrial communication scenarios, drones will not only serve as on-demand base-stations, as supporting alternatives or backhauls for the terrestrial base stations, but they will also provide seamless connectivity for distributed monitoring and surveillance applications, which require an ultra-reliable low latency service for carrying multimedia data. THz band sensing will also provide additional sensing capabilities from the sky to THz-enabled DSNs. Presenting this vision, in this paper, we first discuss possible use cases of THz-enabled drone networks considering communication, sensing and localization aspects. Then, for revealing the capacity potential of THz-enabled drone networks, we provide motivating channel capacity results for communication of drones at different altitudes, under ideal channel conditions with no fading and realistic channel with beam misalignment and multipath fading. We further present major challenges pertaining to employing the THz band for DSNs, addressing physical layer issues, followed with spectrum and interference management, medium access control and higher layers and security, while reviewing some prominent solutions. Finally, we highlight future research directions with Artificial Intelligence (AI)/Machine Learning (ML)-based approaches and mobile edge computing.

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Section: Capacity Of Thz Communication Among Dronesmentioning

confidence: 99%