Results 41 to 50 of about 2,209,550 (335)

Analysis of an Upper Bound on the Effects of Large Scale Attenuation on Uplink Transmission Performance for Massive MIMO Systems

open access: yesIEEE Access, 2017
Massive multiple-input multiple-output (MIMO) is a potential candidate key technology for the 5G of wireless communication systems. In research to date, different power loss and shadowing effects on different antenna elements across the large arrays have
Liu Liu   +3 more
doaj   +1 more source

Outage Capacity of Opportunistic Beamforming with Random User Locations

open access: yes, 2013
This paper studies the outage capacity of a network consisting of a multitude of heterogenous mobile users, and operating according to the classical opportunistic beamforming framework.
Evans, Jamie   +2 more
core   +1 more source

Directionally Resolved Measurement and Modeling of THz Band Propagation Channels

open access: yesIEEE Open Journal of Antennas and Propagation, 2022
Design and assessment of THz communications systems, which will form an essential part of 6G, require an understanding of the propagation channels the systems will operate in.
Jorge Gomez-Ponce   +4 more
doaj   +1 more source

Connectivity of confined 3D Networks with Anisotropically Radiating Nodes [PDF]

open access: yes, 2013
Nodes in ad hoc networks with randomly oriented directional antenna patterns typically have fewer short links and more long links which can bridge together otherwise isolated subnetworks.
Coon, Justin P.   +2 more
core   +3 more sources

Sub-6-GHz 5G Large-Scale Path Loss Model for Shoemaker Rim F: Sensitivity to Transmitter Antenna Pattern

open access: yesTelecom
Future lunar missions require robust 5G communication links, and their design depends partly on path loss characterization, link budget planning inputs, and path prediction loss models tailored to the Moon’s environmental conditions. This work develops a
Quadri R. Adebowale, Shawn Ostermann
doaj   +1 more source

Percolation and Connectivity on the Signal to Interference Ratio Graph [PDF]

open access: yes, 2011
A wireless communication network is considered where any two nodes are connected if the signal-to-interference ratio (SIR) between them is greater than a threshold.
Vaze, Rahul
core   +1 more source

Indoor Genetic Algorithm-Based 5G Network Planning Using a Machine Learning Model for Path Loss Estimation

open access: yesApplied Sciences, 2022
Accurate wireless network planning is crucial for the deployment of new wireless services. This usually requires the consecutive evaluation of many candidate solutions, which is only feasible for simple path loss models, such as one-slope models or multi-
Yosvany Hervis Santana   +5 more
doaj   +1 more source

Realistic Indoor Path Loss Modeling for Regular WiFi Operations in India

open access: yes, 2017
Indoor wireless communication using Wireless Fidelity (WiFi) is becoming a major need for the success of Internet of Things (IoT) and cloud robotics in both developed and developing countries.
Panigrahi, Bighnaraj   +3 more
core   +1 more source

FEM-Based Surface Wave Multimixed-Path Propagator and Path Loss Predictions

open access: yesIEEE Antennas and Wireless Propagation Letters, 2009
A finite element method (FEM)-based surface wave propagation prediction simulator is developed. The simulator is tested and calibrated against analytical ray-mode models that also take into account the Millington recovery effects. It successfully calculates path losses over multimixed propagation paths at MF and HF frequency bands where the surface ...
Apaydın, Gökhan, Sevgi, Levent
openaire   +2 more sources

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

open access: yesFEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li   +2 more
wiley   +1 more source

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