Results 1 to 10 of about 7,598,998 (257)

Improvement of beam-tracker for sensor network with Free Space Optics

open access: yesMeasurement: Sensors, 2021
We study beam trackers using image processing. This function is used for sensor networks using movable optical space communication. However, the beam tracker did not extract the area of the beam normally, and it was often the case that the beam could not
Tomohiro Shinki, Naoki Kagawa
doaj   +1 more source

Bootstrapping free-space optical networks [PDF]

open access: yesIEEE Journal on Selected Areas in Communications, 2005
We introduce a challenging problem in establishing and initially configuring a free space optical (FSO) network. In such networks, it is assumed that each communication node is a base station, including a router and optical transceivers, and its number of transceivers is limited.
Fang Liu, Uzi Vishkin, Stuart D. Milner
openaire   +1 more source

Free Space Optics Communication for Ultra-High-Speed Train Running in Evacuated Tube

open access: yesApplied Sciences, 2022
This paper develops a novel communication method for an ultra-high-speed train that runs in an evacuated tube. The proposed method significantly reduces the number of needed base stations to provide adequate coverage and data rates.
Hasan Abbas Al-Mohammed, Elias Yaacoub
doaj   +1 more source

High Frequency MEMS Capacitive Mirror for Space Applications

open access: yesMicromachines, 2023
Free space optics laser communication using modulating retroreflectors (MR) is a challenging application for an active mirror, due to the high frequencies (>100 kHz) required to enable sufficient data transfer.
Alvise Bagolini   +5 more
doaj   +1 more source

Analysis of Free-Space Optics Development [PDF]

open access: yes, 2017
The article presents state of work in technology of free-space optical communications (Free Space Optics − FSO). Both commercially available optical data links and their further development are described.
Szabra, D.   +15 more
core   +2 more sources

FatNet: High-Resolution Kernels for Classification Using Fully Convolutional Optical Neural Networks

open access: yesAI, 2023
This paper describes the transformation of a traditional in silico classification network into an optical fully convolutional neural network with high-resolution feature maps and kernels.
Riad Ibadulla   +2 more
doaj   +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

Performance of Cipher Image Transmission in Free Space Optics Under Foggy Weather

open access: yesIEEE Access, 2023
This paper proposes a new cipher image transmission system in free space optics system (FSO). A secure and effective image cryptosystem algorithm based on the Choquet fuzzy integral (CFI) technique and the integer wavelet transform is utilized. Numerical
Somia A. Abd El-Mottaleb   +6 more
doaj   +1 more source

Multitone Photoconductive Sensors for Free-Space Optics

open access: yesIEEE Photonics Journal, 2010
A multitone frequency-biasing technique is applied to an integrated photoconductive (PC) sensor for application to free-space optical (FSO) communication systems.
X. Jin, J.F. Holzman
doaj   +1 more source

Modeling of optical wave propagation through turbulent atmosphere using fractional approach for FSO wireless communication

open access: yesJournal of Physics Communications, 2023
Free space optical (FSO) wireless communication has emerged as a viable alternative to the existing fiber optics and radio frequency (RF) communications due to its ability to operate in unlicensed spectrum, offering huge data handling capacities and ...
Abdullah Nafis Khan   +2 more
doaj   +1 more source

Home - About - Disclaimer - Privacy