Results 21 to 30 of about 33,386 (301)

Narrowband Internet of Things (NB-IoT): From Physical (PHY) and Media Access Control (MAC) Layers Perspectives

open access: yesSensors, 2019
Narrowband internet of things (NB-IoT) is a recent cellular radio access technology based on Long-Term Evolution (LTE) introduced by Third-Generation Partnership Project (3GPP) for Low-Power Wide-Area Networks (LPWAN).
Collins Burton Mwakwata   +5 more
doaj   +1 more source

Ts. Dr. Waheb creates Narrowband Internet of Things Enabled Flood Monitoring and Warning System [PDF]

open access: yes, 2021
A lecturer from the Faculty of Electrical & Electronic Engineering Technology (FTKEE), Universiti Malaysia Pahang (UMP), Ts. Dr. Waheb Abdul Jabbar Shaif Abdullah, 42, created a system called Narrowband Internet of Things Enabled Flood Monitoring and ...
Nur Hartini, Mohd Hatta   +1 more
core  

Turbo-code division multiple access: capacity enhancement of mobile satellite systems using narrowband multiuser detection [PDF]

open access: yes, 2008
This paper presents a new type of multiple access for fixed and mobile satellite communication systems aiming at improving the bandwidth efficiency of highly reliable links suited for air traffic management and other safety services, using compact and ...
P. Fines   +5 more
core   +1 more source

Continuously Wavelength-Tunable First-Order Narrowband Fiber Comb Filter Using Composite Combination of Wave Retarders

open access: yesApplied Sciences, 2020
Here, by harnessing a composite combination of wave retarders, we propose and experimentally demonstrate a first-order narrowband fiber comb filter capable of continuously tuning its wavelength, of which the filter structure is on the fundamental basis ...
Jaehoon Jung, Yong Wook Lee
doaj   +1 more source

A Novel Bitrate Adaptation Method for Heterogeneous Wireless Body Area Networks

open access: yesApplied Sciences, 2018
In the article, a novel bitrate adaptation method for data streams allocation in heterogeneous Wireless Body Area Networks (WBANs) is presented. The efficiency of the proposed algorithm was compared with other known algorithms of data stream allocation ...
Krzysztof K. Cwalina   +4 more
doaj   +1 more source

Constructing Narrowband Thermally Activated Delayed Fluorescence Materials with Emission Maxima Beyond 560 nm Based on Frontier Molecular Orbital Engineering

open access: yes, 2021
The development of purely organic materials with narrowband emission in long wavelength region beyond 560 nm still remains a great challenge. Herein, we present a modification approach of multiple resonance (MR) skeleton with electron donor based on ...
Xinliang, Cai   +4 more
core   +1 more source

Modulation of Fast Narrowband Oscillations in the Mouse Retina and dLGN According to Background Light Intensity [PDF]

open access: yes, 2017
Background light intensity (irradiance) substantially impacts the visual code in the early visual system at synaptic and single-neuron levels, but its influence on population activity is largely unexplored.
Montemurro, Marcelo   +14 more
core   +1 more source

Narrowband Near-Infrared Perovskite/Organic Photodetector: TCAD Numerical Simulation

open access: yesCrystals, 2022
Narrowband photodetectors (PD) established in the near-infrared (NIR) wavelength range are highly required in a variety of applications including high-quality bioimaging.
Marwa S. Salem   +6 more
doaj   +1 more source

Semi-Active Vibration Control Based on a Smart Exciter with an Optimized Electrical Shunt Circuit

open access: yesApplied Sciences, 2021
A smart exciter coupled to cabin panels can be used as a new type of loudspeaker for emergency announcements in the aircraft cabin. The same device can also be used as a semi-active vibration control system which is effective in reducing the amplitude of
Yi Wang, Thomas Kletschkowski
doaj   +1 more source

STBC-based hybrid precoding with DFT codebook construction in Massive MIMO Systems [PDF]

open access: yesInternational Journal of Research and Technology in Electrical Industry
Millimeter wave (mmWave) communication, which utilizes massive multiple input multiple output (MIMO) techniques, is one of the key enabling technologies for high capacity 5G cellular networks.However, the hardware complexity and the high power ...
Homeyra Rahbari   +1 more
doaj   +1 more source

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