Results 41 to 50 of about 4,358,865 (294)
Modeling and Analysis of RFI Impacts on Imaging between Geosynchronous SAR and Low Earth Orbit SAR
Remote Sensing, 2022 Due to the short revisit time and large coverage of Geosynchronous synthetic aperture radars (GEO SARs) and the increasing number of low earth orbit synthetic aperture radar (LEO SAR) constellations, radio frequency interference (RFI) between GEO SARs ...
Xichao Dong +4 more
doaj +1 more source
LTE‐based satellite communications in LEO mega‐constellations [PDF]
International Journal of Satellite Communications and Networking, 2018 SummaryThe integration of satellite and terrestrial networks is a promising solution for extending broadband coverage to areas not connected to a terrestrial infrastructure, as also demonstrated by recent commercial and standardisation endeavours. However, the large delays and Doppler shifts over the satellite channel pose severe technical challenges ...
Alessandro Guidotti +7 more
openaire +6 more sources
A Novel Non- Terrestrial Networks Architecture: All Optical LEO Constellations with High-Altitude Ground Stations [PDF]
2024 IEEE International Conference on Communications Workshops (ICC Workshops)The emergence of low Earth orbit (LEO) satellite mega-constellations is dynamically transforming the space sector. While free-space optical (FSO) links efficiently facilitate inter-satellite data forwarding, they suffer from atmospheric/weather ...
Pablo G. Madoery +4 more
semanticscholar +1 more source
Rethinking LEO Constellations Routing with the Unsplittable Multi-Commodity Flows Problem
Advanced Satellite Multimedia Systems Conference / Signal Processing for Space Communications Workshop, 2022 This study investigates the performance of an innovative routing protocol inspired by the Unsplittable Multi-Commodity Flow (UMCF) problem. LEO routing schemes are often based on Shortest Path (SP) algorithms, the Floyd-Warshall algorithm is usually ...
Paul Grislain +6 more
semanticscholar +1 more source
Location Management in Internet Protocol-Based Future LEO Satellite Networks: A Review
IEEE Open Journal of the Communications Society, 2022 Future integrated terrestrial, aerial, and space networks will involve thousands of low-Earth-orbit (LEO) satellites, which will form a network of mega-constellations.
Tasneem Darwish +4 more
doaj +1 more source
Exploring the Contribution of PNT LEO Satellites to Precise Positioning Applications
Engineering Proceedings, 2023 Positioning services based on GNSS (Global Navigation Satellite Systems) have been using MEO satellites designed to guarantee Earth global coverage for decades.
Jorge Durán +5 more
doaj +1 more source
Demand-Aware Flexible Handover Strategy for LEO Constellation
2023 IEEE International Conference on Communications Workshops (ICC Workshops), 2023 peer ...
Tedros Salih Abdu +5 more
openaire +2 more sources
Exploiting topology awareness for routing in LEO satellite constellations [PDF]
2021 IEEE Global Communications Conference (GLOBECOM), 2021 Low Earth Orbit (LEO) satellite constellations combine great flexibility and global coverage with short propagation delays when compared to satellites deployed in higher orbits. However, the fast movement of the individual satellites makes inter-satellite routing a complex and dynamic problem. In this paper, we investigate the limits of unipath routing
Jonas W. Rabjerg +3 more
openaire +4 more sources
Satellite NavigationLarge constellations composed of a great amount of Low Earth Orbit (LEO) satellites are widely applied in satellite communication, remote sensing, augmented satellite navigation, environment monitoring, and so on.
Yuanxi Yang, Xiaoyong Song
semanticscholar +1 more source
Phased Array Antenna Analysis Workflow Applied to Gateways for LEO Satellite Communications
Sensors, 2022 Nowadays, mega-constellations of Low Earth Orbit (LEO) satellites have become increasingly important to provide high-performance Internet access with global coverage.
Irene Merino-Fernandez +3 more
doaj +1 more source