Results 11 to 20 of about 465,453 (325)

Packet Flow Capacity Autonomous Operation Based on Reinforcement Learning

open access: yesSensors, 2021
As the dynamicity of the traffic increases, the need for self-network operation becomes more evident. One of the solutions that might bring cost savings to network operators is the dynamic capacity management of large packet flows, especially in the ...
Sima Barzegar, Marc Ruiz, Luis Velasco
doaj   +1 more source

Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulator [PDF]

open access: yesAdvances in Radio Science, 2013
In this contribution, efficiency enhancement of a radio frequency (RF) power amplifier (PA) for Long Term Evolution (LTE) base stations using envelope tracking is investigated. The dynamically adapted drain bias voltage is provided by a three-level class-
A. Bräckle   +4 more
doaj   +1 more source

Map-Assisted Constellation Design for mmWave WDM With OAM in Short-Range LOS Environment

open access: yesIEEE Open Journal of the Communications Society, 2023
We consider a system that integrates positioning and single-user millimeter wave (mmWave) communication, where the communication part adopts wavelength division multiplexing (WDM) and orbital angular momentum (OAM).
Yuan Wang   +3 more
doaj   +1 more source

Channel Modeling and Signal Processing for Array-Based Visible Light Communication System Under Link Misalignment

open access: yesIEEE Photonics Journal, 2022
We address the lens optimization and signal processing for array-based multiple-input multiple-output (MIMO) visible light communication, especially under link misalignment.
Jiaqi Wei   +3 more
doaj   +1 more source

Deep Learning-Based Robust Visible Light Positioning for High-Speed Vehicles

open access: yesPhotonics, 2022
Robustness is a key factor for real-time positioning and navigation, especially for high-speed vehicles. While visible light positioning (VLP) based on LED illumination and image sensors is widely studied, most of the VLP systems still suffer from the ...
Danjie Li   +12 more
doaj   +1 more source

Controllable 3D display system based on frontal projection lenticular screen [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2014
A novel auto-stereoscopic three-dimensional (3D) projection display system based on the frontal projection lenticular screen is demonstrated. It can provide high real 3D experiences and the freedom of interaction.
Feng Q.   +6 more
doaj   +1 more source

A Hybrid Model for Central Bank Digital Currency Based on Blockchain

open access: yesIEEE Access, 2021
With the development of blockchain technology, the research on digital currency is attracting more and more attention, especially Central Bank Digital Currency (CBDC), which plays an important role in national economic construction.
Jinnan Zhang   +6 more
doaj   +1 more source

Effect of side-mode suppression ratio on the performance of self-seeded gain-switched optical pulses in lightwave communications systems [PDF]

open access: yes, 1999
The side-mode suppression ratio (SMSR) of self-seeded gain-switched optical pulses is shown to be an extremely important factor for the use of these pulses in optical communications systems.
Anandarajah, Prince M., Barry, Liam P.
core   +1 more source

Optical network technologies for future digital cinema [PDF]

open access: yes, 2016
Digital technology has transformed the information flow and support infrastructure for numerous application domains, such as cellular communications.
Kaleem, Mohammad, Nazir, Sajid
core   +4 more sources

Energy Transfer and Cross-Relaxation Induced Efficient 2.78 μm Emission in Er3+/Tm3+: PbF2 mid-Infrared Laser Crystal

open access: yesCrystals, 2021
An efficient enhancement of 2.78 μm emission from the transition of Er3+: 4I11/2 → 4I13/2 by Tm3+ introduction in the Er/Tm: PbF2 crystal was grown by the Bridgman technique for the first time. The spectroscopic properties, energy transfer mechanism, and
Jiayu Liao   +10 more
doaj   +1 more source

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