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

Han, Chong; Wang, Yiqin; Li, Yuanbo; Chen, Yi; Abbasi, Naveed A.; Kürner, Thomas; Molisch, Andreas F.

doi:10.1109/comst.2022.3182539

Cited by 166 publications

(100 citation statements)

References 294 publications

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“…Communications in the THz band (0.1–10 THz) is a key candidate to meet these requirements because of the availability of large amount of unused spectrum in this band (Akyildiz et al., 2014 ). The topic has thus seen a lot of recent interest especially in the 0.1–0.5 THz range as pointed out by some recent survey papers on the future of THz communications (Chen et al., 2019 ; Han et al., 2021 ; Kürner & Priebe, 2014 ; Rappaport et al., 2019 ). This interest is in part fostered by the recent decision of the US spectrum regulator, the Federal Communication Commission (FCC), to provide experimental licenses in the 140–220 GHz band, and the expectation that this band is to be an important part of 6G wireless systems (Tataria et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…Also, recently the authors of (Xing et al., 2021 ; Xing & Rappaport, 2021 ) have performed and analyzed channel measurements above 140 GHz. A detailed survey covering various indoor and outdoor scenarios is given in (Han et al., 2021 ). Yet, the understanding of the key channel characteristics in this band is still very preliminary since the overall number of directionally‐resolved channel measurements is still very small and it needs to be explored further before an eventual development and deployment can be considered.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Common Reflecting and Absorbing Building Materials on THz Multipath Channels

et al. 2022

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THz band communication has the potential to meet the high data rate demands of many current and future applications. However, before these networks are realized, extensive channel measurements are needed in order to characterize the wireless channel at these frequencies, in order to inform system design and deployment. In the current paper, we present a set of double‐directional channel measurements that are conducted in several relevant indoor and outdoor scenarios. Our aim is to see the effect of common building materials that might be particularly reflective or absorptive (such as energy‐saving glass, window blinds, or metallic reflectors), and how their presence changes the channel characteristics. Among other effects we find that ‐ depending on the considered dynamic range ‐ presence/absence of these materials can increase the required equalizer length by an order of magnitude.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of Common Reflecting and Absorbing Building Materials on THz Multipath Channels

et al. 2022

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“…Researchers studied the fifth generation cellular network technology (5G), and they found that it has a greater capacity while it uses a new spectrum [1][2][3][4][5][6][7]. 5G millimeter-wave bands use frequency bands in the 24-100 GHz range [8][9][10][11][12], which can support many devices [13][14][15][16] and demonstrate the performance of outlining 5G service requirements [17,18]. Leaky-wave antennas (LWAs) are highly promising directional antennas for millimeter and submillimeter waves [19][20][21] because they can achieve higher directive radiation [22][23][24] with single or multiple feedings [25,26], resulting in a compact structure [27] with low energy consumption [28,29].…”

Section: Introductionmentioning

confidence: 99%

A Promising Ka Band Leaky-Wave Antenna Based on a Periodic Structure of Non-Identical Irregularities

Shaaban

Ali

Yasseen

et al. 2022

Preprint

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This paper presents a new periodic grooved dielectric leaky-wave antenna (LWA) with non-identical irregularities for an extremely high-frequency (EHF) range capable of performing efficiently in the Ka band through a stable gain, a decrease in the level of the side lobes, and the achievement of a narrower main lobe beam. It consists of a dielectric waveguide antenna placed inside a channeled rectangular metallic waveguide to improve performance. A dielectric rod was used to overcome the losses related to the propagation of electromagnetic waves in metal conductors. A grooved dielectric of a 21-element linear array is used to propose a simple approach for the synthesis of such antennas based on a modified energy method and is fed by a standard waveguide. It was designed and simulated at 37.2 GHz for satellite, 5G antennas, and radar applications. The major novelty of this study is the ability to control the direction of the main lobe through non-identical irregularities in geometric parameters, such as the width, height, and distance between each element. Radiation techniques have been studied extensively using simulations. A performance antenna with radiation efficiency 99.35%, gain 22 dBi, width of radiation pattern 3.2 ◦ , and side lobe level (SLL) -18.3 dB has been achieved.

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“…On one hand, physical channel measurement supported by a wideband channel sounder is one of the major approaches to investigate THz wireless channels [4]. Due to the high path loss and frequency-dependent molecular absorption above 300 GHz, to-date THz channel measurement campaigns, typically, either focused on the "sub-THz" band (100-300 GHz) [5]- [10], or line-ofsight (LoS) [11]- [13] and short-range (desktop, motherboard, data center) [14], [15] scenarios above 300 GHz.…”

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confidence: 99%

“…On the other hand, channel simulation is another way to study THz wireless channels, which is typically implemented for channel characteristic analysis in the environment where measurement is unavailable [21], or for channel data reproduction [4]. To-date channel simulators rely on deterministic channel modeling methods, like CloudRT [22], [23], EDX Advanced Propagation [24], and Wireless InSite [25], or stochastic, like QuaDriGa [26] and NYUSIM [27], [28].…”

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confidence: 99%

Joint Channel Measurement and Simulation Analysis in an L-shaped Indoor Hallway in the Terahertz Band

Wang¹,

Li²,

Chen³

et al. 2022

Preprint

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The Terahertz (THz) band (0.1-10 THz), which supports Terabit-per-second (Tbps) data rates, has been envisioned as one of the promising spectrum bands for sixth-generation (6G) and beyond communications. In this paper, an angular-resolvable wideband channel measurement campaign in an indoor L-shaped hallway at 306-321 GHz is presented, by using a frequency-domain vector network analyzer (VNA)-based channel sounder. Four line-of-sight (LoS), six quasi-line-of-sight (QLoS) and eight non-line-of-sight (NLoS) receiver points are measured. However, measured data spreads due to the rich scattering environment and the antenna pattern, which puzzles traditional clustering algorithms. To solve this problem, a simulation-assisted Density-Based Spatial Clustering of Applications with Noise (DBSCAN) clustering algorithm is proposed, where the deterministic simulation result is extracted to adapt the conventional DBSCAN algorithm. The proposed algorithm outperforms conventional clustering algorithms like DBSCAN, K-means, and K-power-means in terms of Silhouette, Calinski-Harabasz and Davies-Bouldin indices. Furthermore, the THz multi-path propagation in the L-shaped hallway is elaborated, and channel characteristics of multipath and clusters are analyzed in depth.

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

Cited by 166 publications

References 294 publications

Impact of Common Reflecting and Absorbing Building Materials on THz Multipath Channels

Impact of Common Reflecting and Absorbing Building Materials on THz Multipath Channels

A Promising Ka Band Leaky-Wave Antenna Based on a Periodic Structure of Non-Identical Irregularities

Joint Channel Measurement and Simulation Analysis in an L-shaped Indoor Hallway in the Terahertz Band

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