Results 31 to 40 of about 3,586 (179)

Weather Effects on FSO Network Connectivity

open access: yesJournal of Optical Communications and Networking, 2012
The use of relays is one of the most promising methods for mitigating impairments of the performance of free-space optical (FSO) systems and extending their limited transmission range. However, several factors contribute to significant link performance degradation.
Alexander Vavoulas   +2 more
openaire   +2 more sources

Simple and Universal Current Modulator Circuit for Indoor Mobile Free-Space-Optical Communications Testing

open access: yesAdvances in Electrical and Electronic Engineering, 2014
The use of LED for illumination and communication together is more and more interesting with the increasing deployment of LEDs to our homes and industrial buildings.
Stanislav Hejduk   +5 more
doaj   +1 more source

Design and Experimental Investigation of Decode-and-Forward and Amplify-and-Forward Relaying FSO-CDMA

open access: yesIEEE Photonics Journal, 2022
The scheme of combining relay and optical code division multiple access (OCDMA) is one of the effective methods to improve the reliability and security of free space optical (FSO) communication system.
Jianhua Ji   +4 more
doaj   +1 more source

Adaptive-Combining-Based Hybrid FSO/RF Satellite Communication With and Without HAPS

open access: yesIEEE Access, 2021
In recent years, a growing interest has been witnessed in the usage of free space optics (FSO) link for satellite communication (SATCOM) scenarios, as it offers much higher data rates up to gigabits per second (Gbps) compared to existing radio frequency (
Suyash Shah   +4 more
doaj   +1 more source

Methods of Atmospheric Coherence Length Measurement

open access: yesApplied Sciences, 2022
Free-space optical (FSO) communication possesses the advantages of high security, large information capacity, high-speed transmission, small terminal size, low power consumption, easy and flexible deployment, etc.
Ming Li, Pengxin Zhang, Jiawei Han
doaj   +1 more source

Analysis of possibilities for measurement effect of visibility in experimental FSO system

open access: yesOpen Computer Science, 2018
Nowadays, wireless optical systems are very popular because they offer a a lot of advantages including high speed transmission, high security levels, and low maintenance costs. One of these wireless optical systems is Free Space Optics (FSO).
Márton Michal   +3 more
doaj   +1 more source

Optical, Wired and Wireless Multimedia Service Access Solutions for Trend Setting Real Estates

open access: yesCommunications, 2008
It is a well known fact that the value of real estates is raised tremendously by its connection to information technology services like Voice over IP (VoIP), IPTV, Video on Demand (VoD), basic Internet services and house-, security- and surveillance ...
Peter Mandl, P. Schrotter, E. Leitgeb
doaj   +1 more source

A Two‐Stage Characterization Pipeline and Open‐Source Framework for Reproducible Tactile Sensing

open access: yesAdvanced Intelligent Systems, EarlyView.
The same soft tactile sensor returns different numbers when embodied in different robots. This is an Embodiment Gap that no shared framework currently captures transparently. A two‐stage characterization pipeline, paired with a FAIR open‐source digital datasheet, decouples intrinsic sensor behavior from embodiment effects and condenses cross‐laboratory
Matteo Lo Preti   +6 more
wiley   +1 more source

Dezintegracja struktur wywiadowczych Związku Sowieckiego po 1991 roku - ujęcie historyczne i ocena skutków tego zjawiska

open access: yesStudia Podlaskie
Koniec „zimnej wojny” to czas zmian systemowych i restrukturyzacji rosyjskich instytucji wywiadowczych oraz struktur tego typu w innych krajach Wspólnoty Niepodległych Państw.
Józef Kozłowski
doaj   +1 more source

On the Capacity Performance of Hybrid FSO/RF System With Adaptive Combining Over Generalized Distributions

open access: yesIEEE Photonics Journal, 2022
This paper investigates the ergodic capacity performance of hybrid free space optics (FSO)/ radio frequency (RF) system by employing an adaptive-combining-based switching scheme.
Narendra Vishwakarma, Swaminathan R
doaj   +1 more source

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