5G key technologies for smart railways

B Ai, AF Molisch, M Rupp, ZD Zhong - Proceedings of the IEEE, 2020‏ - ieeexplore.ieee.org
Railway communications has attracted significant attention from both academia and
industries due to the booming development of railways, especially high-speed railways …

Towards 6G: Paradigm of realistic terahertz channel modeling

K Guan, H Yi, D He, B Ai, Z Zhong - China Communications, 2021‏ - ieeexplore.ieee.org
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 …

Measurement, simulation, and characterization of train-to-infrastructure inside-station channel at the terahertz band

K Guan, B Peng, D He, JM Eckhardt… - IEEE Transactions …, 2019‏ - ieeexplore.ieee.org
In this paper, we measure, simulate, and characterize the train-to-infrastructure (T2I) inside-
station channel at the terahertz (THz) band for the first time. To begin with, a series of …

Towards realistic high-speed train channels at 5G millimeter-wave band—Part II: Case study for paradigm implementation

K Guan, B Ai, B Peng, D He, G Li, J Yang… - IEEE Transactions …, 2018‏ - ieeexplore.ieee.org
In this paper, we present two case studies for generating realistic high-speed train (HST)
channels at fifth-generation (5G) millimeter-wave (mmWave) band. The first one is the tunnel …

Dynamically reversible and strong circular dichroism based on Babinet-invertible chiral metasurfaces

X Luo, F Hu, G Li - Optics Letters, 2021‏ - opg.optica.org
We propose a Babinet-invertible chiral metasurface for achieving dynamically reversible and
strong circular dichroism (CD). The proposed metasurface is composed of a VO 2–metal …

Review on ray tracing channel simulation accuracy in sub-6 GHz outdoor deployment scenarios

AW Mbugua, Y Chen, L Raschkowski… - IEEE Open Journal …, 2020‏ - ieeexplore.ieee.org
In this article, a review of the achieved accuracy in the literature for ray tracing (RT) based
channel modeling is presented with a focus on outdoor propagation scenarios in the sub-6 …

[PDF][PDF] Beyond 5G: the role of THz spectrum

R Singh, W Lehr, D Sicker… - Tprc47: The 47th research …, 2019‏ - researchgate.net
There have been substantial technical and policy discussions about the spectrum needs of
5G and the necessity of expanding access to higher frequency spectrum, including in the …

Measurement‐based omnidirectional millimetre‐wave and sub‐THz propagation analysis in a large cubicle office environment

J Lee, JJ Park, KW Kim, HK Kwon… - … Microwaves, Antennas & …, 2023‏ - Wiley Online Library
For 5G beyond and/or 6G mobile services, a new spectrum at frequencies above 100 GHz
has received great attention lately. To characterise the similarities and the differences …

Space-time/frequency line coded OFDM: System design and practical implementation

C Wu, Y **ao, YL Guan, J Wang, X Li, P Yang - IEEE access, 2019‏ - ieeexplore.ieee.org
In this paper, we investigate a class of new multiple-input multiple-output (MIMO)
transmission schemes, dubbed space time line code (STLC), in the context of different …

Low‐altitude UAV air‐ground propagation channel measurement and analysis in a suburban environment at 3.9 GHz

Z Cui, C Briso, K Guan, DW Matolak… - IET Microwaves …, 2019‏ - Wiley Online Library
Unmanned aerial vehicles (UAVs) have been applied to various promising applications
because of their features of high‐mobility, portability, rapid deployment, and modest power …