Results 51 to 60 of about 869,960 (293)
GNSS rapid precise point positioning enhanced by low Earth orbit satellites
Satellite Navigation, 2023 The Low Earth Orbit (LEO) satellites can be used to effectively speed up Precise Point Positioning (PPP) convergence. In this study, 180 LEO satellites with a global distribution are simulated to evaluate their contribution to the PPP convergence.
Ju Hong +7 more
doaj +1 more source
Feasibility of Using Beam Steering to Mitigate Ku-Band LEO-to-GEO Interference
IEEE Access, 2022 Low-Earth orbiting (LEO) satellites now hold promise to provide broadband service anywhere in the world, but they must share the radio spectrum with geosynchronous Earth-orbiting (GEO) satellites. The United Nations International Telecommunications Union
Alex Hills, Jon M. Peha, Jens Munk
doaj +1 more source
On routing for extending satellite service life in LEO satellite networks [PDF]
2014 IEEE Global Communications Conference, 2014 We address the problem of routing for extending the service life of satellites in Iridium-like LEO constellations. Satellites in LEO constellations can spend over 30% of their time under the earth's umbra, time during which they are powered by batteries. While the batteries are recharged by solar energy, the depth of discharge they reach during eclipse
Mohammed Hussein +2 more
openaire +3 more sources
Advanced Functional Materials, EarlyView.Neuromorphic devices for extreme environments are interpreted through the physical states that store and process information. Radiation, temperature extremes, and vacuum can perturb vacancies, filaments, trapped charges, polarization, interfaces, and readout signals.
Taehyun Park +7 more
wiley +1 more source
Research on Dynamic Virtualization Distributed Mobility Management Method for LEO Satellite Network
天地一体化信息网络, 2020 With the commercialization of 5G,the integration of satellite communication and ground 5G has become a key research direction in the industry.Low earth orbit satellite network can cover the whole world and communicate with anyone at any time and anywhere.
Hongtao ZHU, Qing GUO
doaj +2 more sources
Modeling and Analysis of Hybrid GEO-LEO Satellite Networks [PDF]
In this letter, we consider a hybrid GEO-LEO satellite network where GEO and LEO satellites are distributed according to independent Poisson point processes and share the same frequency resources.
Jung, Dong-Hyun +3 more
core +3 more sources
GaliLEO: A Simulation Tool for LEO Satellite Constellations [PDF]
SIMULATION, 2002 The authors present GaliLEO, a simulator for the transmission of connection-oriented traffic over a constellation of LEO/MEO (low/medium earth orbit) satellites. Its scope is limited to the satellites and the stations accessing them, without any modelling of the terrestrial network, but inside this scope the goal is to study the performance of ...
Potorti' F., Franck L.
openaire +8 more sources
Learning Emergent Random Access Protocol for LEO Satellite Networks
, 2023 Learning Emergent Random Access Protocol for LEO Satellite ...
JH Lee (8002133) +4 more
core
Adaptive Beam Pattern Selection and Resource Allocation for NOMA-Based LEO Satellite Systems [PDF]
, 2022 The low earth orbit (LEO) satellite system is one of the promising solutions to provide broadband services to a wide-coverage area for future integrated LEO-6G networks, where users' demands vary with time and geographical locations.
WANG, Anyue +7 more
core +1 more source
Advanced Functional Materials, EarlyView.The APTES linker establishes a permanent interfacial dipole, reducing the work function of n‐GaN from 3.55 to 3.29 eV. This strengthens the built‐in electric field, significantly accelerating hole extraction to drive the oxygen evolution reaction (OER). Ultimately, this tailored charge‐separation architecture achieves a remarkable 4.78‐fold enhancement
Jeong‐Kyun Oh +15 more
wiley +1 more source