Results 21 to 30 of about 23,111 (157)

Model of Radio-Communications Platform Supporting Inland Navigation [PDF]

open access: yesTransNav
The article presents model of the Radio–communications Platform supporting Inland Navigation. The model of integrated satellite, analog and digital radio – communications systems has been presented.
Andrzej Lisaj
doaj   +1 more source

Interference and Protection in Satellite Laser Communication

open access: yes天地一体化信息网络, 2023
In order to explore the safety protection technologies for various external interferences in satellite laser communication, four interference sources in the satellite laser communication link and their principles were introduced, included atmospheric ...
Chenzhe LAO, Jianfeng SUN
doaj   +2 more sources

Stand for measuring the directional characteristics of antennas of satellite communication systems

open access: yesКосмические аппараты и технологии, 2020
The development of network based on satellite communication systems is a promising solution for providing telecommunications services in the Arctic.
A. B. Gladyshev   +4 more
doaj   +1 more source

Study of different performance measures and their relations in satellite‐based and terrestrial quantum communication

open access: yesIET Quantum Communication, 2021
Rapid developments in quantum communication are paving the way forward for more advanced technologies. Conventional channels like optical fibres have been a great resource in recent decades.
Avik Mukhopadhyay   +4 more
doaj   +1 more source

Deep reflector prime focus feed for space communication

open access: yesThe Journal of Engineering, 2021
In this paper, design of a prime‐focus feed for a deep reflector, Earth–Moon–Earth space communication system is described. The feed is based on a circular waveguide equipped with two chokes in order to minimise sidelobes and illuminate the deep dish ...
Rastislav Galuscak   +4 more
doaj   +1 more source

First Retrieval of Sea Surface Currents Using L-Band SAR in Satellite Formation

open access: yesRemote Sensing
The inversion of ocean currents is a significant challenge and area of interest in ocean remote sensing. Spaceborne along-track interferometric synthetic aperture radar (ATI-SAR) has several advantages and benefits, including precise observations ...
Bo Pan   +6 more
doaj   +1 more source

Secure Communication in Non-Geostationary Orbit Satellite Systems: A Physical Layer Security Perspective

open access: yesIEEE Access, 2019
Satellite communication systems serve as an indispensable component of wireless heterogeneous networks in 5G era for providing various critical civil and military applications.
Yeqiu Xiao   +4 more
doaj   +1 more source

Stages of Structural and Parametric Synthesis of Low Earth Orbit Communication Systems with Broadband Inter-Satellite Links

open access: yesRUDN Journal of Engineering Research
The paper discusses the scientific rationale for the structural and parametric synthesis of low Earth orbit communication systems (LEOCSs) with broadband inter-satellite links (ISLs) and on-board data routing, principles and stages underlying data ...
Sergey B. Pichugin
doaj   +1 more source

An Overview of Satellite Link Budget Sensitivity Based on Digital Modulation Schemes in Multi-Orbit Satellite Networks

open access: yesApplied Sciences
With the rapid development of multi-orbit satellite networks, efficient and reliable communication systems have become essential for ensuring the link connectivity.
Denis Stanescu, Alexandra Buzducea
doaj   +1 more source

Performance evaluation of compansion-based clipped OFDM systems

open access: yesEURASIP Journal on Wireless Communications and Networking
The peak-to-average power ratio (PAPR), commonly used to describe the amplitude variations of an OFDM (orthogonal frequency-division multiplex) signal, does not accurately reflect its impact on the system performance.
Stephan Pfletschinger, Guido Dietl
doaj   +1 more source

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