Results 21 to 30 of about 82,109 (188)
Remote Sensing, 2023 The global navigation satellite system (GNSS) is developing rapidly, and the related market applications and scientific research are increasing. Studies based on large low Earth orbit (LEO) satellite constellations have become research hotspots.
Baopeng Xu +8 more
doaj +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
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
A Wised Routing Protocols for Leo Satellite Networks
, 2015 This Study proposes a routing strategy of combining a packet scheduling with congestion control policy that applied for LEO satellite network with high speed and multiple traffic.
Firouzja, Saeid Aghaei Nezhad +3 more
core +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
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
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
MOST photometry of the RRd Lyrae variable AQ Leo: Two radial modes, 32 combination frequencies, and beyond [PDF]
, 2007 Highly precise and nearly uninterrupted optical photometry of the RR Lyrae star AQ Leo was obtained with the MOST (Microvariability & Oscillations of STars) satellite over 34.4 days in February-March 2005.
Cameron, Chris +14 more
core +2 more sources
Integration of Satellites in 5G through LEO Constellations
, 2017 The standardization of 5G systems is entering in its critical phase, with 3GPP that will publish the PHY standard by June 2017. In order to meet the demanding 5G requirements both in terms of large throughput and global connectivity, Satellite ...
Guidotti, Alessandro +2 more
core +1 more source
Modulation and Signal Processing for LEO-LEO Optical Inter-Satellite Links
IEEE Access, 2023 Nous étudions les aspects clés des communications optiques cohérentes sur les liaisons inter-satellites (ISL) pour les constellations ultra-denses de prochaine génération en orbite terrestre basse (LEO). Dans un premier temps, la pertinence des formats de modulation QPSK, 8-QAM et 16-QAM avec différents débits de symboles (28 GBaud, 60 GBaud et 120 ...
I. P. Vieira +2 more
openaire +3 more sources