Results 21 to 30 of about 3,586 (179)

Численное решение задачи фильтрации оценок информационного воздействия на электорат

Информатика и автоматизация, 2022
В статье предложены постановка и численная схема решения задачи фильтрации оценок информационного воздействия средств масс-медиа на электорат, позволяющие с высокой степенью точности на заданном интервале наблюдения определить число индивидов в обществе,
Kirill Loginov
doaj   +1 more source

Introduction of the Pelleted Smallpox Vaccine TEOVak into Serial Production to Provide Biosafety of the Population of the Russian Federation

Проблемы особо опасных инфекций, 2010
The industrial basis was developed and licensed to produce effective pelleted oral smallpox vaccine TEOVak in the Virologic Centre. Several series of TEOVak preparation were produced in accordance with the industrial technology on a built-in processing ...
V. P. Bondarev, A. I. Terent`ev, S. A. Melnicov, T. A. Bondareva   +3 more
doaj   +1 more source

On the ASER performance of amplify-and-forward relaying MIMO/FSO systems using SC-QAM signals over log-normal and gamma-gamma atmospheric turbulence channels and pointing error impairments

Journal of Information and Telecommunication, 2020
In this work, we analyse pointing error effects on the performance of amplify-and-forward (AF) relaying multiple-input multiple-output (MIMO) free-space optical (FSO) communication system employing sub-carrier quadrature amplitude modulation (SC-QAM ...
Duong Huu Ai, Ha Duyen Trung, Do Trong Tuan   +2 more
doaj   +1 more source

Availability of free-space optics (FSO) and hybrid FSO/RF systems [PDF]

SPIE Proceedings, 2001
Free Space Optics (FSO) has become a viable, high-bandwidth wireless alternative to fiber optic cabling. The primary advantages of FSO over fiber are its rapid deployment time and significant cost savings. The disadvantage of FSO over fiber is that laser power attenuation through the atmosphere is variable and difficult to predict, since it is weather ...
Isaac I. Kim, Eric J. Korevaar
openaire   +1 more source

Performance Analysis of UAV-Assisted Hybrid FSO/RF Communication Systems under Various Weather Conditions

Sensors, 2023
Nowadays, unmanned aerial vehicle (UAV) communication systems are commonly considered as one of the key enabling technologies for 6G. The hybrid free space optical (FSO)/radio frequency (RF) system has the advantages of both FSO and RF links to improve ...
Yan Wu, Dejin Kong, Qian Wang, Gang Li
doaj   +1 more source

Ergodic Capacity Analysis of Satellite Communication Systems With SAG-FSO/SH-FSO/RF Transmission

IEEE Photonics Journal, 2022
Future non-terrestrial networks aim to achieve a throughput of Terabits/s. Therefore, free-space optical (FSO) communications have been adopted as a candidate solution due to their ability to achieve an extremely high data rate.
Ramy Samy, Hong-Chuan Yang, Tamer Rakia, Mohamed-Slim Alouini   +3 more
doaj   +1 more source

Effects of Atmospheric Turbulence on Optical Wireless Communication in NEOM Smart City

Photonics, 2022
The foundation of any smart city requires an innovative and robust communication infrastructure. Many research communities envision free-space optical communication (FSO) as a promising backbone technology for the services and applications provided by ...
Ayshah S. Alatawi, Albashir A. Youssef, Mohamed Abaza, Mohammad Ammad Uddin, Ali Mansour   +4 more
doaj   +1 more source

Performances Study of PSK and ASK Modulation Technique under Atmospheric Turbulence in FSO Communication System [PDF]

Engineering and Technology Journal
The performance and reliability of a free-space optical (FSO) communication system can be greatly increased using various methods. The primary goal of each technique is to reduce the effect of disturbances that lead to intensity or phase fluctuations in ...
Esraa Al – Gazzi, Ekbal Ali, Assel Mohammed   +2 more
doaj   +1 more source

Cascaded FSO-VLC Communication System [PDF]

IEEE Wireless Communications Letters, 2017
The proposed cascaded free space optics (FSO)-visible light communication (VLC) system consists of multiple VLC access points which caters the end users connected via a decode and forward relay to the FSO backhaul link. The FSO link is assumed to be affected by path-loss, pointing error, and atmospheric turbulence while the end-to-end signal-to-noise ...
Akash Gupta 0003, Nikhil Sharma 0002, Parul Garg, Mohamed-Slim Alouini   +3 more
openaire   +2 more sources

Optimal Multiple FSO Transceiver Configuration for Using on High-Altitude Platforms

IEEE Access, 2023
Free-space optical (FSO) communication requires light of sight (LoS) between the transmitter and the receiver. For long-distance communication, many research projects have been conducted towards using a network composed of high-altitude platforms (HAPs ...
Dieu Linh Truong, The Ngoc Dang
doaj   +1 more source