Results 21 to 30 of about 33,564 (307)

Multi-Spot Tracking System for Free-Space Optical Communication [PDF]

Radioengineering, 2022
This article describes a multi-spot tracking system for free space optic communications systems suitable for tracking optical terminals observed within the field-of-view of a wide angle telescope.
P. Skryja, J. Poliak, O. Wilfert
doaj  

Differential Signalling in Free-Space Optical Communication Systems

Applied Sciences, 2018
In this paper, we review the differential signalling techniques and investigate its implementation of in free-space optical (FSO) communication systems.
Mojtaba Mansour Abadi, Zabih Ghassemlooy, Manav R. Bhatnagar, Stanislav Zvanovec, Mohammad-Ali Khalighi, Martin P. J. Lavery   +5 more
doaj   +1 more source

SAC-OCDMA over Hybrid FTTx Free Space Optical Communication Networks

Journal 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, Terry Tan Kwang Chun, Siti Barirah Ahmad Anas, Salasiah Hitam, Makhfudzah Mokhtar   +4 more
doaj   +1 more source

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

Electronics 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

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

IEEE 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, Dagang Jiang, Zhimeng Hu, Qinyong Zeng, Kaiyu Qin   +4 more
doaj   +1 more source

Fading testbed for free-space optical communications [PDF]

SPIE Proceedings, 2016
Free-space optical (FSO) communication is a very attractive technology offering very high throughput without spectral regulation constraints, yet allowing small antennas (telescopes) and tap-proof communication. However, the transmitted signal has to travel through the atmosphere where it gets influenced by atmospheric turbulence, causing scintillation
Amita Shrestha, Dirk Giggenbach, Ahmad Mustafa, Jorge Pacheco-Labrador, Julio Ramirez, Fabian Rein   +5 more
openaire   +2 more sources

Enhanced Neural Architecture for Real-Time Deep Learning Wavefront Sensing

Sensors
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, Qingfeng Liu, Liying Tan, Jing Ma, Nanxing Chen   +4 more
doaj   +1 more source

Buffer-Aided Max-Link Relaying for Free Space Optical Communication With Delay Constraints

IEEE Photonics Journal, 2022
In this paper, we introduce the concept of buffer-aided cooperative relaying for a free-space optical (FSO) communication system. The proposed FSO system consists of $K$ decode-and-forward(DF) relays, each equipped with a buffer of size $L$. The proposed
Ashish Kant Shukla, Manav R. Bhatnagar
doaj   +1 more source

Prospects and Challenges of Free Space Optical Communications

, 2018
Free space optical (FSO) transmission is a technology which uses a narrow laser beam to transmit the signal from the source to the destination through the free space. Although it has various advantages, a laser beam propagating through the atmosphere is subjected to different kind of disturbances causing the attenuation of the signal and, in some ...
Abir Touati, Farid Touati, Abderrazak Abdaoui, Amith Khandakar, Ammar Bouallegue   +4 more
openaire   +2 more sources

Quantum Relay-Assisted Free-Space Optical Communication

IEEE Photonics Journal
Relay-based quantum communication utilizes intermediate nodes to extend the transmission distanceof quantum signals and mitigate the masking effect caused by obstacles or turbulence in free-space optical (FSO) channels.
Manav R. Bhatnagar, M. K. Arti, Kushagra Bhatnagar   +2 more
doaj   +1 more source