Performance Analysis of LEO Satellite Networks [PDF]
, 2002 We present an analytical model for computing call blocking probabilities in a LEO satellite network that carries voice calls. Both satellite-fixed and earth-fixed constellations with inter-orbit links and hand-offs are considered. The model is analyzed approximately by decomposing it into sub-systems.
Abdul Halim Zaim +2 more
openaire +1 more source
A Modified Regular Perturbation Model for the Single-Span Fiber Transmission Using Learnable Methods
PhotonicsIn fiber optic communication systems, the dispersion and nonlinear interaction of optical signals are critical to modeling fiber optic communication, and the regular perturbation (RP) model is a simplified modeling method composed of parallel branches ...
Shuhong He +11 more
doaj +1 more source
Energy-Efficient and QoS-Aware Computation Offloading in GEO/LEO Hybrid Satellite Networks
, 2023 Benefiting from advanced satellite payload technologies, edge computing servers can be deployed on satellites to achieve orbital computing and reduce the mission processing delay.
Yunqing Ding +5 more
core +1 more source
Darkening Low-Earth Orbit Satellite Constellations: A Review
IEEE Access, 2022 The proliferation of low-earth orbit (LEO) satellites and the LEO satellite internet will be a game-changer for the low-latency high-speed global internet.
Ali Lalbakhsh +5 more
doaj +1 more source
Multiple Antenna Configuration of LEO-MIMO Feeder Link for High Channel Capacity
IEEE AccessWe investigated low Earth orbit satellite (LEO) communications applying Multiple-Input/Multiple-Output (MIMO) technology to the feeder link transmission between a satellite and gateway antennas to improve the channel capacity.
Daisuke Goto +3 more
doaj +1 more source
Resource Allocation for LEO Beam-Hopping Satellites in a Spectrum Sharing Scenario
IEEE Access, 2021 In recent years, low earth orbit (LEO) satellite constellation systems have been developed rapidly. However, the scarcity of satellite spectrum resources has become one of the major obstacles to this trend.
Jingyu Tang +4 more
doaj +1 more source
Real-Time LEO Satellite Orbits Based on Batch Least-Squares Orbit Determination with Short-Term Orbit Prediction [PDF]
, 2022 The augmentation of the Global Navigation Satellite System (GNSS) by Low Earth Orbit (LEO) satellites is proposed as an effective method to improve the precision and shorten the convergence time of Precise Point Positioning (PPP).
Wang, Kan +9 more
core +1 more source
Satellite handover techniques for LEO networks [PDF]
International Journal of Satellite Communications and Networking, 2004 AbstractLow earth orbit satellite constellations could play an important role in future mobile communication networks due to their characteristics, such as global coverage and low propagation delays. However, because of the non‐stationarity of the satellites, a call may be subjected to handovers, which can be cell or satellite handovers.
Papapetrou, E. +3 more
openaire +2 more sources
On call admission control and handover management in multimedia LEO satellite systems
, 2013 11 S.Low earth orbit (LEO) satellite systems gained considerable interest in the past decade and were expected to be instrumental in future telecommunications systems.
Pavlidou, Fotini-Niovi +2 more
core +1 more source
FDG‐PET Associations With Disease Severity and Outcomes in NMDA‐Receptor IgG Autoimmune Encephalitis
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Patients with N‐methyl‐D‐aspartate (NMDA) receptor‐immunoglobulin G (IgG) autoimmune encephalitis (NMDAR‐IgG AE) demonstrate occipital lobe hypometabolism on baseline brain fluorodeoxyglucose‐positron emission tomography (bFDG‐PET).
Jonathan K. Lee +7 more
wiley +1 more source