Measurement, Simulation, and Characterization of Train-to-Infrastructure Inside-Station Channel at the Terahertz Band

Guan, Ke; Peng, Bile; He, Danping; Eckhardt, Johannes M.; Rey, Sebastian; Ai, Bo; Zhang, Zhong; Kürner, Thomas

doi:10.1109/tthz.2019.2909975

Cited by 76 publications

(66 citation statements)

References 43 publications

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“…Not only vehicle to infrastructure communication technology is evolving but also train to infrastructure (T2I) communication is developing towards smart rail mobility. Indeed, since high-data rate wireless connectivity with bandwidth beyond GHz is needed in order to establish T2I and interwagon scenarios, the authors in [255] demonstrated a complete study concerning measurement, simulation, and characterization of the T2I channel using the THz frequency band. Despite the high path loss of THz signals as well as the high mobility experienced by such high speed trains, the authors note that a robust THz link between the access points of the network can still be achieved.…”

Section: F Terahertz Automotive Applicationsmentioning

confidence: 99%

Terahertz Band: The Last Piece of RF Spectrum Puzzle for Communication Systems

Elayan

Amin

Shihada

et al. 2020

IEEE Open J. Commun. Soc.

358

219

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Ultra-high bandwidth, negligible latency and seamless communication for devices and applications are envisioned as major milestones that will revolutionize the way by which societies create, distribute and consume information. The remarkable expansion of wireless data traffic that we are witnessing recently has advocated the investigation of suitable regimes in the radio spectrum to satisfy users' escalating requirements and allow the development and exploitation of both massive capacity and massive connectivity of heterogeneous infrastructures. To this end, the Terahertz (THz) frequency band (0.1-10 THz) has received noticeable attention in the research community as an ideal choice for scenarios involving high-speed transmission. Particularly, with the evolution of technologies and devices, advancements in THz communication is bridging the gap between the millimeter wave (mmW) and optical frequency ranges. Moreover, the IEEE 802.15 suite of standards has been issued to shape regulatory frameworks that will enable innovation and provide a complete solution that crosses between wired and wireless boundaries at 100 Gbps. Nonetheless, despite the expediting progress witnessed in THz wireless research, the THz band is still considered one of the least probed frequency bands. As such, in this work, we present an up-to-date review paper to analyze the fundamental elements and mechanisms associated with the THz system architecture. THz generation methods are first addressed by highlighting the recent progress in the electronics, photonics as well as plasmonics technology. To complement the devices, we introduce the recent channel models available for indoor, outdoor as well as nanoscale propagation at THz band frequencies. A comprehensive comparison is then presented between the THz wireless communication and its other contenders by treating in depth the limitations associated with each communication technology. In addition, several applications of THz wireless communication are discussed taking into account the various length scales at which such applications occur. Further, as standardization is a fundamental aspect in regulating wireless communication systems, we highlight the milestones achieved regarding THz standardization activities. Finally, a future outlook is provided by presenting and envisaging several potential use cases and attempts to guide the deployment of the THz frequency band and mitigate the challenges related to high frequency transmission. ). Fig. 1. Wireless Roadmap Outlook up to the year 2035.

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Section: F Terahertz Automotive Applicationsmentioning

confidence: 99%

Terahertz Band: The Last Piece of RF Spectrum Puzzle for Communication Systems

Elayan

Amin

Shihada

et al. 2020

IEEE Open J. Commun. Soc.

358

219

View full text Add to dashboard Cite

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“…As two typical famous deterministic models, RT and the graph‐based models are widely implemented to model the propagation channels in various scenarios. For instance, a geometry‐based deterministic model (GBDM) based on RT method was proposed in Guan et al (2019) to model the propagation channels at the terahertz (THz) band.…”

Section: Background and Related Workmentioning

confidence: 99%

Position‐Based Wireless Channel Characterization for the High‐Speed Vactrains in Vacuum Tube Scenarios Using Propagation Graph Modeling Theory

et al. 2020

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Wireless channel modeling is regarded as a pivotal research topic, since the analysis and evaluation of the wireless communication system requires a reliable model of the channel impulse response (CIR). This paper presents a novel and practical study on the position-based radio propagation channel for high-speed vactrains in the vacuum tube scenarios using the propagation graph channel modeling theory. Based on the Lambertian scattering pattern, the propagation graph channel modeling method considers the diffusion effect of radio waves. A multiple-input multiple-output (MIMO) wideband system channel is emulated for obtaining the virtual channel data. During the emulation process, the line-of-sight (LoS), single-bounced and double-bounced components are considered to yield the virtual CIR. Then, small-scale fading properties such as K factor, time delay spread (DS), and Doppler frequency feature are parameterized particularly, which presents dynamic variances at different train locations. Moreover, the simulation performance analysis of the MIMO system focuses on the ergodic capacity and the singular value spread (SVS). The corresponding results indicate a MIMO capacity performance degradation in this scenario. The proposed model can facilitate the reliable simulation and evaluation of MIMO systems for the high-speed vactrains in the vacuum tube scenarios.

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“…In this study, the RT simulation is based on the reconstructed three-dimensional (3D) scenario model with calibrated EM parameters at 300 GHz. The EM parameters of the relevant materials were calibrated in our previous work [24,25] and are summarized in Table 1. In the table, ε r and ε r are the real and imaginary parts of the relative permittivity, respectively; S and α are the scattering coefficient and exponent for the directive scattering model.…”

Section: Simulation Scenario and Configurationsmentioning

confidence: 99%

Impact of Meteorological Attenuation on Channel Characterization at 300 GHz

Lai

Guan

et al. 2020

Electronics

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Terahertz (THz) communication is a key candidate for the upcoming age of beyond-fifth-generation mobile networks (B5G) or sixth-generation mobile networks (6G) in the next decade and can achieve ultra-high data rates of dozens of gigabits or even terabits per second. As the carrier frequency increases from radio frequency (RF) to the THz band, the impact of meteorological factors on the wireless link is expected to become more pronounced. In this work, we first provide an overview of the attenuation caused by atmospheric gases, fog, and rain on terrestrial THz wireless communications using the recommendations of the International Telecommunication Union-Radiocommunication (ITU-R). Measured data from the literature are used to predict the attenuation caused by snow. Because unfavorable weather conditions may harm sensitive measurement equipment, ray-tracing (RT) simulations are sometimes used as an alternative to extend sparse empirical data. In this study, the terrestrial channel in an urban scenario at 300 GHz, with a bandwidth of 8 GHz, is characterized using RT simulations under different meteorological factors. The key performance parameters are explored, including path loss (PL), Rician K-factor (KF), root-mean-square (RMS) delay spread (DS), and four angular spreads. The channel characteristics under different meteorological conditions studied in this work are expected to aid the design of future outdoor terrestrial THz communications.

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Measurement, Simulation, and Characterization of Train-to-Infrastructure Inside-Station Channel at the Terahertz Band

Cited by 76 publications

References 43 publications

Terahertz Band: The Last Piece of RF Spectrum Puzzle for Communication Systems

Terahertz Band: The Last Piece of RF Spectrum Puzzle for Communication Systems

Position‐Based Wireless Channel Characterization for the High‐Speed Vactrains in Vacuum Tube Scenarios Using Propagation Graph Modeling Theory

Impact of Meteorological Attenuation on Channel Characterization at 300 GHz

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