Results 21 to 30 of about 13,205,622 (263)

Optical Free-Space Communication on Earth and in Space regarding Quantum Cryptography Aspects [PDF]

open access: yes, 2010
Mobile FSO Communication links have gained signi cant at- tention over the last years due to their increasing maturity. They are used in point to point link scenarios where the high gain in power efficiency and datarate is crucial, compared to state-of ...
Fuchs, Christian   +3 more
core   +1 more source

SAC-OCDMA over Hybrid FTTx Free Space Optical Communication Networks

open access: yesJournal of Telecommunications and Information Technology, 2015
This paper presents an investigation of Spectral Amplitude Coding Optical Code Division Multiple Access (SAC-OCDMA) over hybrid Fiber-to-the-x (FTTx) Free Space Optical (FSO) link under different weather conditions.
Ratna Kalos Zakiah Sahbudin   +4 more
doaj   +1 more source

G‐MGF based performance analysis of coherent FSO systems with multiple receivers

open access: yesElectronics Letters, 2021
This letter investigates the performance of coherent free‐space optical systems with multiple receivers especially through the generalised moment‐generating function based approach.
Seongah Jeong, Jinkyu Kang, Hoojin Lee
doaj   +1 more source

Free Space Optical Communication in Long-Reach Unidirectional Ring-Architecture Fiber Network

open access: yesIEEE Access, 2020
In the work, a ring-constructed wavelength-division-multiplexing (WDM) access system for delivering multiple free space optical (FSO) wireless signals is investigated.
Chien-Hung Yeh   +4 more
doaj   +1 more source

Automotive free-space optical communication at 1400nm [PDF]

open access: yes, 2021
Future vehicular transportation will use autonomous and semi-autonomous systems with, in part, the aim of significantly improving road safety. Implementing a reliable communication system that allows for the sharing of information between vehicles and ...
Farmer, James
core   +1 more source

The effect of atmospheric turbulence on the performance of the free space optical communications [PDF]

open access: yes, 2008
In free space optical (FSO) communication links, atmospheric turbulence has a significant impact on the quality of a laser beam propagating through the atmosphere.
Ghassemlooy, Zabih   +7 more
core   +1 more source

Single-Layer Phase Screen With Pointing Errors for Free Space Optical Communication

open access: yesIEEE Access, 2021
Single-layer phase screen is a classical, simple and accurate approach for simulating the optical field under turbulence, and it is generally used in free space optical communication (FSOC).
Xin Liu   +4 more
doaj   +1 more source

Optical High-Capacity Satellite Downlinks via High-Altitude Platform Relays [PDF]

open access: yes, 2007
Earth-observation (EO) satellite missions produce a large amount of data using high-resolution optical or radar sensors. During the last decades the amount of data has steadily increased due to improved sensor technologies with increased temporal ...
Florian Moll   +13 more
core   +1 more source

Coherent polarization shift keying modulated free space optical links over a Gamma-Gamma turbulence channel [PDF]

open access: yes, 2011
Problem statement: The optical signal propagating through the Free Space Optical (FSO) channel suffers from irradiance and phase fluctuations caused by the atmospheric turbulence, which results in Bit Error Rate (BER) performance degradation ...
Ghassemlooy, Zabih   +7 more
core   +1 more source

Enhanced Neural Architecture for Real-Time Deep Learning Wavefront Sensing

open access: yesSensors
To achieve real-time deep learning wavefront sensing (DLWFS) of dynamic random wavefront distortions induced by atmospheric turbulence, this study proposes an enhanced wavefront sensing neural network (WFSNet) based on convolutional neural networks (CNN).
Jianyi Li   +4 more
doaj   +1 more source

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