Results 71 to 80 of about 56,164 (284)

Pilot contamination reduction in massive MIMO systems based on pilot scheduling

EURASIP Journal on Wireless Communications and Networking, 2018
The pilot contamination caused by sharing the non-orthogonal pilots among users is considered to be a bottleneck of the massive multi-input multi-output (MIMO) systems.
Yucheng Wu, Tong Liu, Meng Cao, Liang Li, Weiyang Xu   +4 more
doaj   +1 more source

Beam-Domain-Based Pilot Assignment for Energy Efficient Cell-Free Massive MIMO

In this letter, an efficient beam-domain-based pilot assignment scheme is proposed to mitigate the pilot contamination caused by pilot reuse in cell-free massive multiple-input multiple-output systems.
Schwarz, Stefan; orcid:, Rupp, Markus; orcid:, Mussbah, Mariam; orcid:   +2 more
core   +1 more source

A Lightweight Procedural Layer for Hybrid Experimental–Computational Workflows in Materials Science

Advanced Engineering Materials, EarlyView.
We unveil a prototype hybrid‐workflow framework that fuses automatedcomputation with hands‐on experiments. Built atop pyiron, a lightweight, parameterized layer translates procedure descriptions into executable manual steps, syncing instrument settings, human interventions, and data capture in real‐time today.
Steffen Brinckmann, Sarath Menon, Raphael Röske, Johannes Steinhülb, Michael Selzer, Jan Janssen, Tilmann Hickel, Ruth Schwaiger, Jörg Neugebauer   +8 more
wiley   +1 more source

On the Performance of Downlink Channel Estimation‐Based Cell‐Free Massive MIMO Systems Under Correlated Rician Fading Channels

Engineering Reports
The prevailing research on cell‐free massive multiple‐input multiple‐output (MIMO) systems posits that, due to channel reciprocity and channel hardening properties, user equipment (UEs) can decode downlink data solely based on uplink statistical channel ...
Jiarui Li, Yao Zhang, Fengjiao Gan, Na Liu, Longxiang Yang, Hongbo Zhu   +5 more
doaj   +1 more source

Experimental Characterization of Mycelium‐Based Composites Under Multiple Loading Conditions

Advanced Engineering Materials, EarlyView.
This study examines the mechanical response of mycelium‐based composites under compression, shear, and tension using mechanical testing and imaging methods. The comparison between unpressed and hot‐pressed specimens shows that hot pressing is associated with higher compression and shear stiffnesses.
Shaghayegh Elahi, Kimiya Tajik, Harvey Shaw, Matti Isakov, Sami Pajunen, Lauri Rautkari   +5 more
wiley   +1 more source

Using SHERPA to predict design-induced error on the flight deck. [PDF]

, 2005
Human factors certification criteria are being developed for large civil aircraft. The objective is to reduce the incidence of design induced error on the flight deck.
Harris, Don, Stanton, Neville A., Demagalski, Jason M., Salmon, Paul M., Salmon, P M, Demagalski, J, Salmon, Paul, Young, MS, Demagalski, J M, Marshall, A, Young, Mark S., Harris, D, Stanton, N A, Demagalski, Jason, Stanton, NA, Marshall, Andrew, Salmon, P, Young, M S   +17 more
core   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

Advanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Near‐Optimal Pilot Assignment in Cell‐Free Massive MIMO

Internet Technology Letters
ABSTRACT Cell‐free massive MIMO systems are currently being considered as potential enablers of future (6G) technologies for wireless communications. By combining distributed processing and massive MIMO, they are expected to deliver improved user coverage and efficiency.
Raphael M. Guedes, José Ferreira de Rezende, Valmir C. Barbosa   +2 more
openaire   +2 more sources

Scalable Pilot Assignment for User-Centric Cell-Free Massive MIMO Networks

, 2022
Cell-free massive multiple-input multiple-output (MIMO) is considered as a promising network architecture for beyond-5G communications with its potential of supporting the exponentially increasing mobile connections and resolving the inherent ...
Beach, Mark A, Zhihan Ren, Doufexi, Angela, Mark A. Beach, Ren, Zhihan, Angela Doufexi   +5 more
core   +1 more source

Mechanical Behavior and Fracture Mechanisms of MXene/PVDF Nanocomponsites: In Situ Characterization and Multiscale Analysis

Advanced Functional Materials, EarlyView.
Multiscale experiments and modeling reveal how Ti3C2Tx MXene nanosheets reinforce PVDF nanocomposites. An optimal MXene loading (∼1 wt.%) nearly doubles tensile strength through efficient stress transfer, flake alignment, and crack‐deflection mechanisms, transforming ductile polymer behavior into a controlled multi‐stage fracture pathway which aligns ...
Bita Soltan Mohammadlou, James FitzPatrick, Li Meng, Kateryna Shevchuk, Ahmad Najafi, Yury Gogotsi   +5 more
wiley   +1 more source