Results 51 to 60 of about 37,809 (196)

Impact of Inter-Satellite Links on the Cost and Placement of the Ground Segment of Q/V Band NGSO Constellations

open access: yesIEEE Access
Finding the cost-optimal number and placement of ground stations of non-geostationary satellite constellations is a complex problem whose solution significantly impacts the quality of the satellite service.
Clement Lacoste   +2 more
doaj   +1 more source

Opportunities for the Majority: Bringing Market-based Solutions to Latin America and the Caribbean to Promote Social Change [PDF]

open access: yes, 2012
Some 360 million people in Latin America and the Caribbean -70 percent of the population- live on very low incomes and have not shared in the economic and social growth of the region.
Inter-American Development Bank
core   +1 more source

Topology-adapting routing strategy for global navigation satellite system

open access: yesInternational Journal of Distributed Sensor Networks, 2017
In order to implement global precision navigation, the global navigation satellite system must rely on information exchange with the ground station to achieve system time synchronization and inter-satellite ranging. For the limitations of ground stations
Yue Zhao, Xianqing Yi, Zhenwei Hou
doaj   +1 more source

On the Integration of Random Access and DAMA Channels for the Return Link of Satellite Networks

open access: yes, 2013
Recent advances in Random Access (RA), improving throughput and loss rates, make the usage of such technique particularly interesting to complement Demand Assigned Multiple Access (DAMA) channels for the return link of satellite systems.
Munari, Andrea   +3 more
core   +1 more source

Adaptive routing strategy in multi layer satellite communication networks

open access: yesTongxin xuebao, 2006
The characteristics of multi-coverage of multilayer satellite networks make sure of good validity and reliability of the space-based networks.Walker delta type constellation guarantees permanent inter satellite links between satellites in the same layer ...
LI Hui, GU Xue-mai
doaj   +2 more sources

Broadband satellite multimedia [PDF]

open access: yes, 2010
The broadband satellite multimedia (BSM) architecture standardised by ETSI defines a satellite independent service access point (SI-SAP) interface layer that separates the satellite independent features of the upper layers from the satellite dependant ...
Berioli M.   +22 more
core   +1 more source

Survey of Low Earth Orbit Satellite Communication Network Routing Technology

open access: yes天地一体化信息网络, 2022
Low earth orbit satellite communication network is an important part of the internet of everything era, but the characteristics of satellite constellation topology such as high dynamic, limited heterogeneous resources and unbalanced network service ...
Shuang ZHENG, Xing ZHANG, Wenbo WANG
doaj   +2 more sources

Inter-satellite link technologies and applications in Low Earth Orbit satellite networks

open access: yesICT Express
To support the objectives of next-generation networks, Low Earth Orbit (LEO) satellite communications have attracted significant attention. In large-scale LEO constellations, Inter-Satellite Links (ISLs) are crucial for satisfying a range of network ...
Byoungkyu Ji   +4 more
doaj   +1 more source

BSM Integrated PEP with Cross-Layer Improvements [PDF]

open access: yes, 2009
The future development of broadband satellite systems providing services based on the Internet Protocol (IP) needs to be stimulated by means of common standards. This paper presents the ETSI BSM PEP terminal architecture and PEP usage scenarios.
Berioli M.   +15 more
core   +1 more source

On the Achievable Rates for the Return-Link of Multi-Beam Satellite Systems Using Successive Interference Cancellation

open access: yes, 2011
This paper investigates the theoretically reachable rates in the return-link of multi-user multi-beam satellite systems. The return-link can actually be analyzed by means of multiple-input multiple-output signal processing techniques. While MIMO inspired
Michael Joham   +7 more
core   +1 more source

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