Results 51 to 60 of about 834,282 (244)

Transmission Channel Analysis for Broadband Communication over Multiconductor UIC Cables Onboard Regional Trains

Energies, 2019
In this contribution, the authors perform a detailed analysis relating to the use of the multiconductor UIC (Union Internationale des Chemins de fer) cables as a broadband data transmission channel onboard regional trains.
Sami Barmada, Mauro Tucci, Francesco Romano   +2 more
doaj   +1 more source

An Efficient Approach of Improving Path Loss Models for Future Mobile Networks in Enclosed Indoor Environments

IEEE Access, 2021
Path loss is the primary factor that determines the overall coverage of networks. Designing reliable wireless communication systems requires accurate path loss prediction models. Future wireless mobile systems will rely mainly on the super-high frequency
Mohamed K. Elmezughi, Thomas J. Afullo
doaj   +1 more source

Physical Multi-Layer Phantoms for Intra-Body Communications

IEEE Access, 2018
This paper presents approaches for creating tissue mimicking materials that can be used as phantoms for evaluating the performance of the body area networks (BANs).
Ahmed E. Khorshid, Ibrahim N. Alquaydheb, Ahmed M. Eltawil, Fadi J. Kurdahi   +3 more
doaj   +1 more source

THz-Enabled UAV Communications Under Pointing Errors: Tractable Statistical Channel Modeling and Security Analysis

IEEE Open Journal of Vehicular Technology
Unmanned aerial vehicles (UAVs) are increasingly being utilized as mobile base stations for rapidly establishing temporary wireless coverage in emergency situations and remote locations.
Mohammad Javad Saber, Mazen Hasna, Osamah S. Badarneh   +2 more
doaj   +1 more source

Channel Modeling for Future High-Speed Railway Communication Systems: A Survey

IEEE Access, 2019
The widespread popularity of high-speed railways (HSRs) urges a critical demand on high-data-rate railway communication services for both train operation and passenger experience.
Tao Zhou, Huayu Li, Yang Wang, Liu Liu, Cheng Tao   +4 more
doaj   +1 more source

Semantic Segmentation of Brain Tumors Using a Local–Global Attention Model

Applied Sciences
The distinctions between tumor areas and surrounding tissues are often subtle. Additionally, the morphology and size of tumors can vary significantly among different patients.
Shuli Xing, Zhenwei Lai, Junxiong Zhu, Wenwu He, Guojun Mao   +4 more
doaj   +1 more source

Channel Measurement and Modeling Prototype for IEEE 802.22-Based Regional Area Networks

IEEE Access, 2021
During the design and development of a reliable transceiver, its performance and robustness are evaluated using channel models that simulate the propagation channel characteristics in a real-world environment.
Ruiting Ouyang, Takeshi Matsumura, Keiichi Mizutani, Hiroshi Harada   +3 more
doaj   +1 more source

Optimal Pilot Symbols Ratio in terms of Spectrum and Energy Efficiency in Uplink CoMP Networks

, 2018
In wireless networks, Spectrum Efficiency (SE) and Energy Efficiency (EE) can be affected by the channel estimation that needs to be well designed in practice.
Cui, Qimei, Wang, Ning, Zhang, Yuhao
core   +1 more source

Along-the-channel modeling and analysis of PEFCs at low stoichiometry: Development of a 1+2D model [PDF]

, 2019
Water management remains a key challenge in polymer-electrolyte fuel cells. In this work, a pseudo 3-D (1+2D) model is developed to account better for changes of water management along the channel, as well as verify the possibilities of using ...
Borup, RL, Gerhardt, MR, Macauley, N, Mukundan, R, Pant, LM, Weber, AZ   +5 more
core  

Numerical Simulation of a Turbulent Flow in a Channel with Surface Mounted Cubes [PDF]

, 1998
In this paper we report on a fourth-order, spectro-consistent simulation of a complex turbulent flow. A spatial discretization of a convection-diffusion equation is termed spectro-consistent if the spectral properties of the convective and diffusive ...
Veldman, A.E.P.,, Verstappen, R.W.C.P.,
core   +1 more source