Channel Sounding and Ray Tracing for THz Channel Characterization

Guan, Ke; Ai, Bo; He, Danping; Zhu, Fusheng; Yi, Haofan; Dou, Jianwu; Zhong, Zhangdui

doi:10.1109/ucmmt49983.2020.9295992

Cited by 15 publications

(16 citation statements)

References 16 publications

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“…In the deterministic category, an RT model with a defined environmental database, antennas, and trajectory of Tx, Rx, and scatterers can be seen as a channel simulator. A widely used one based on this approach, called CloudRT [28], [204], is jointly developed by BJTU and TU Braunschweig [81], [82], [205]. It integrates a V2V RT simulator [206], [207] validated by measurements in [206], [208] and a ultrawideband THz RT simulator [153] validated by measurement results in [153], [209].…”

Section: E Remarks and Discussionmentioning

confidence: 99%

“…The clock frequency is 9.22 GHz, and the bandwidth is about 8 GHz, so that most of the sequence power is concentrated within 8 GHz in the frequency domain [79]. With this measurement system, first, Beijing Jiao Tong University (BJTU) and Technische Universität Braunschweig carried out channel measurements and modeling for train-to-train (T2T) [80], infrastructure-to-infrastructure (I2I) [80], train-to-infrastructure (T2I) inside-station [81], and intra-wagon [82], [83] channels from 60 GHz to 0.3 THz, studying the propagation characteristics of mmWave and THz waves in railway scenarios [84]. Among these, investigation of the intra-wagon channel is directionally resolved in the horizontal plane [82], [83].…”

Section: B Time-domain Sliding Correlation Methodsmentioning

confidence: 99%

“…With this measurement system, first, Beijing Jiao Tong University (BJTU) and Technische Universität Braunschweig carried out channel measurements and modeling for train-to-train (T2T) [80], infrastructure-to-infrastructure (I2I) [80], train-to-infrastructure (T2I) inside-station [81], and intra-wagon [82], [83] channels from 60 GHz to 0.3 THz, studying the propagation characteristics of mmWave and THz waves in railway scenarios [84]. Among these, investigation of the intra-wagon channel is directionally resolved in the horizontal plane [82], [83]. Besides, these measurement campaigns were carried out in static scenarios and further dynamic measurement of the scenario is still an open issue [85].…”

Section: B Time-domain Sliding Correlation Methodsmentioning

confidence: 99%

“…13, where the indoor scenarios include office, data center, intra-wagon, etc. [51], [54], [57], [58], [73], [77], [82], [83], [226]- [228], [230]- [233], and the outdoor scenarios vary from urban, vehicle-to-infrastructure (V2I), T2I, T2T, etc. [61], [63], [70], [75], [81], [84], [224], [225], respectively.…”

Section: A Large-scale and Small-scale Channel Characteristicsmentioning

confidence: 99%

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Terahertz Wireless Channels: A Holistic Survey on Measurement, Modeling, and Analysis

Chen¹,

Wang²,

Li³

et al. 2021

Preprint

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Terahertz (THz) communications are envisioned as a key technology for sixth generation (6G) wireless systems. The study of underlying THz wireless propagation channels provides the foundations for the development of reliable THz communication systems and their applications. This article provides a comprehensive overview of the study of THz wireless channels. First, the three most popular THz channel measurement methodologies, namely, frequency-domain channel measurement based on a vector network analyzer (VNA), time-domain channel measurement based on sliding correlation, and time-domain channel measurement based on THz pulses from time-domain spectroscopy (THz-TDS), are introduced and compared. Current channel measurement systems and measurement campaigns are reviewed. Then, existing channel modeling methodologies are categorized into deterministic, stochastic, and hybrid approaches. State-of-the-art THz channel models are analyzed, and the channel simulators that are based on them are introduced. Next, an in-depth review of channel characteristics in the THz band is presented. Finally, open problems and future research directions for research studies on THz wireless channels for 6G are elaborated.

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Section: E Remarks and Discussionmentioning

confidence: 99%

Section: B Time-domain Sliding Correlation Methodsmentioning

confidence: 99%

Section: B Time-domain Sliding Correlation Methodsmentioning

confidence: 99%

Section: A Large-scale and Small-scale Channel Characteristicsmentioning

confidence: 99%

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Terahertz Wireless Channels: A Holistic Survey on Measurement, Modeling, and Analysis

Chen¹,

Wang²,

Li³

et al. 2021

Preprint

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“…The first module of the paradigm is "limited channel sounding", in which we use a UWB channel sounder [47] to do measurements in an HST test center for Inside station scenario [26] and Intra-wagon scenario [25]. As stated in our recent study [48], this channel sounder can measure 17590 CIRs per second with a dynamic range over 30 dB at the 300 GHz band with an 8 GHz bandwidth.…”

Section: Case Study For Realizing Real-istic Thz Channels For Smart Rail Mobilitymentioning

confidence: 99%

Towards 6G: Paradigm of realistic terahertz channel modeling

Guan

et al. 2021

China Commun.

Self Cite

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Terahertz (THz) communications are envisioned as a key technology for the sixth-generation wireless communication system (6G). However, it is not practical to perform large-scale channel measurements with high degrees of freedom at THz frequency band. This makes empirical or stochastic modeling approaches relying on measurements no longer stand. In order to break through the bottleneck of scarce fulldimensional channel sounding measurements, this paper presents a novel paradigm for THz channel modeling towards 6G. With the core of high-performance ray tracing (RT), the presented paradigm requires merely quite limited channel sounding to calibrate the geometry and material electromagnetic (EM) properties of the three-dimensional (3D) environment model in the target scenarios. Then, through extensive RT simulations, the parameters extracted from RT simulations can be fed into either ray-based novel stochastic channel models or cluster-based standard channel model families. Verified by RT simulations, these models can generate realistic channels that are valuable for the design and evaluation of THz systems. Representing two ends of 6G THz use cases from microscopy to macroscopy, case studies are made for close-proximity communications, wireless connections on a desktop, and smart rail mobility, respectively. Last but not least, new concerns on channel modeling resulting from distinguishing features of THz wave are discussed regarding propagation, antenna array, and device aspects, re-

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