Results 21 to 30 of about 191,135 (314)

Continuous-Variable Quantum Secret Sharing Based on Thermal Terahertz Sources in Inter-Satellite Wireless Links

open access: yesEntropy, 2021
We propose a continuous-variable quantum secret sharing (CVQSS) scheme based on thermal terahertz (THz) sources in inter-satellite wireless links (THz-CVQSS).
Chengji Liu   +5 more
doaj   +1 more source

Optimization of intersatellite routing for real-time data download [PDF]

open access: yes, 2018
The objective of this study is to develop a strategy to maximise the available bandwidth to Earth of a satellite constellation through inter-satellite links.
Ceriotti, Matteo, Yarr, Neil
core   +1 more source

A Novel LFM Waveform for Terahertz-Band Joint Radar and Communications over Inter-Satellite Links [PDF]

open access: yesGlobal Communications Conference, 2022
There is no doubt that we need to keep our eyes on the sky as satellite networks aim to address the demands of 6G and beyond communications systems. On the other hand, the existence of millions of space debris pieces, large or small, poses a threat to ...
Gizem Sümen   +2 more
semanticscholar   +1 more source

Precoding in multigateway multibeam satellite systems [PDF]

open access: yes, 2016
This paper considers a multigateway multibeam satellite system with multiple feeds per beam. In these systems, each gateway serves a set of beams (cluster) so that the overall data traffic is generated at different geographical areas.
Joroughi, Vahid   +2 more
core   +3 more sources

Fully Autonomous Orbit Determination and Synchronization for Satellite Navigation and Communication Systems in Halo Orbits

open access: yesRemote Sensing, 2023
This paper presents a solution for autonomous orbit determination and time synchronization of spacecraft in Halo orbits around Lagrange points using inter-satellite links.
Gheorghe Sirbu, Mauro Leonardi
doaj   +1 more source

Analytical design and performance analysis of LEO mega chain satellite constellation

open access: yesXibei Gongye Daxue Xuebao, 2022
With the development of microsatellite technology and the growth of ground reconnaissance demand, the rapid design of a LEO constellation with minimum satellite number, low revisit time (within 10 minutes), and permanent inter-satellite links has become ...
ZHENG Pengfei, CHEN Hongyu, GUO Chongbin
doaj   +1 more source

A Holistic Investigation on Terahertz Propagation and Channel Modeling Toward Vertical Heterogeneous Networks

open access: yes, 2020
User-centric and low latency communications can be enabled not only by small cells but also through ubiquitous connectivity. Recently, the vertical heterogeneous network (V-HetNet) architecture is proposed to backhaul/fronthaul a large number of small ...
Ekti, Ali Rıza   +4 more
core   +1 more source

Routing and re-routing in a LEO/MEO two-tier mobile satellite communications system with inter-satellite links [PDF]

open access: yes, 2000
A novel LEO/MEO two-tier satellite communication system with inter-satellite links (ISLs) is proposed for providing multimedia services to global mobile users.
Hu, JH, Li, T, Yeung, LK
core   +1 more source

Multi-objective optimization of earth cooperative observation hybrid satellite constellation

open access: yesXibei Gongye Daxue Xuebao, 2021
As the demand for comprehensiveness, accuracy, and data fast return of satellite remote sensing information grows, a hybrid constellation with permanent inter-satellite link becomes an inevitable choice for earth cooperative observation.

doaj   +1 more source

Logical topology-based routing in LEO constellations [PDF]

open access: yes, 2001
Satellite communication is distinguished by global coverage and the ability to support a wide range of applications. LEO (Low Earth Orbit) satellite systems employing inter-satellite links offer rich connectivity in space and provide direct broadband ...
Hu, Y, Li, VOK
core   +1 more source

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