Results 61 to 70 of about 7,278,007 (215)

Performance Analysis of Hybrid RF/FSO System Using BPSK-SIM and DPSK-SIM Over Gamma-Gamma Turbulence Channel With Pointing Errors for Smart City Applications

open access: yesIEEE Access, 2018
The flourishing technology in wireless communication-free space optics (FSO) offers lots of merits over radio frequency (RF) links due to its license free bandwidth, ease of installation, high security features, and viable cost for short distance ...
Prabu Krishnan
doaj   +1 more source

Neural Substrates of Attentional Control During Emotional Processing: Evidence From rTMS–fMRI Targeting the Frontal Eye Field

open access: yesHuman Brain Mapping, Volume 47, Issue 7, May 2026.
Using rTMS over the frontal eye field combined with fMRI, we demonstrate that disrupting attentional control slows responses and reduces cortical activity for neutral faces while sparing or amplifying amygdala responses to fearful faces, highlighting a disinhibitory effect of TMS on top‐down control.
Jennifer Malsert   +4 more
wiley   +1 more source

Next Generation Wireless Fronthaul using VCSEL-based Free Space Optics [PDF]

open access: yes, 2023
A free-space optics (FSO) based fronthaul final drop is proposed, enabling cost-effective remote unit deployment.

core   +2 more sources

Heat Transfer Performance of Biphilic Surfaces With Diatomite‐Based Composite Coatings in a Closed Thermosyphon System

open access: yesHeat Transfer, Volume 55, Issue 3, Page 1608-1638, May 2026.
ABSTRACT This study investigates the thermal performance of innovative biphilic boiling surfaces designed for CPU cooling applications using a two‐phase closed thermosyphon (TPCT) system. The surfaces were fabricated by applying composite coatings—comprising epoxy resin and diatomite particles functionalized with APTES and PFOTS silanes— onto Al1050 ...
José Pereira   +3 more
wiley   +1 more source

On the study of the FSO link performance under controlled turbulence and fog atmospheric conditions [PDF]

open access: yes, 2011
In this paper, the effect of turbulence and fog on the free space optical (FSO) communication systems for on off keying (OOK), pulse amplitude modulation (PAM) and subcarrier intensity modulation (SIM) based on binary phase shift keying (BPSK) is ...
Ghassemlooy, Zabih   +6 more
core  

Integrated Free-Space Optics and Fiber Optic Network Performance Enhancement for Sustaining 5G High Capacity Communications

open access: yesInternational Journal of Optics, 2023
In this paper, the integrated free-space optics (FSO) and fiber optic model is evaluated using new radio (NR) sub-THz link to sustain next generation 5G capacity.
Meshari Alsharari   +3 more
doaj   +1 more source

Quantum Protocol Architectures and Secure Control Frameworks For 7G+ Networks: Standards, Synchronization, Use Cases, and Challenges

open access: yesAdvanced Quantum Technologies, Volume 9, Issue 5, May 2026.
ABSTRACT Quantum‐native communication systems are reshaping secure, programmable, and coherence‐aware networking beyond the classical paradigm. As intelligent physical infrastructures, ranging from unmanned aerial vehicle swarms to satellite Quantum Key Distribution (QKD) platforms, demand trust, synchronization, and ultra‐reliability, conventional ...
Shakil Ahmed   +2 more
wiley   +1 more source

High speed train communications systems using free space optics [PDF]

open access: yes, 2010
In this work, we propose a broad-band free space optical (FSO) wireless communications system for high-speed trains. The system consists of optical transceivers positioned outside the train and along the railway track.
Ghassemlooy, Zabih   +4 more
core  

Turbulence‐Resilient Coherent Receiver Array on CMOS‐Compatible Silicon Photonics for Free Space Optical Communications

open access: yesNanophotonics, Volume 15, Issue 5, 16 March 2026.
A CMOS‐compatible silicon‐photonic 4 × 4 coherent receiver array spatially samples turbulence‐distorted wavefronts and, with maximum‐ratio combining, enables signal recovery. Experimental BPSK tests under moderate turbulence approach theoretical combining efficiency, reducing BER from 1E‐2 to 1E‐15.
Alireza Fardoost   +7 more
wiley   +1 more source

Modelling and analysis of FSO ground-to-train communications for straight and curved tracks [PDF]

open access: yes, 2013
In this work, a free space optical (FSO) link for the ground-to-train communications is proposed. Analytical analysis is carried out for the case of the straight as well as curved rail tracks.
Poliak, Juraj   +3 more
core  

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