Results 11 to 20 of about 2,478 (258)
Dual Stream Transmission and Downlink Power Control for Multiple LEO Satellites-Assisted IoT Networks [PDF]
Sensors, 2022 The multi-satellites cooperative transmission can effectively increase the data rate that can be achieved by internet of things (IoT) terminals. However, the dynamic characteristics brought by low Earth orbit (LEO) satellites will seriously decrease the ...
Bingyu Xu +4 more
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Link Budget Analysis for LEO Satellites Based on the Statistics of the Elevation Angle
IEEE Access, 2022 Link budgets are widely applied to evaluate communication links for low Earth Orbit (LEO) satellites. However, approaches to calculate the received power from LEO satellites have followed similar procedures to those for Geostationary (GEO) satellites and
Rafaela Villalpando +2 more
exaly +3 more sources
GPS Galileo BDS3 LEO uncalibrated phase delays estimation and tight combination precise point positioning with ambiguity resolution [PDF]
Scientific ReportsMulti-system precise point positioning (PPP) can increase the number of observing satellites and improve the geometric configuration between the receivers and the satellites, and low-Earth orbit (LEO) satellites have fast motion and low orbital altitude,
Jing Fang +5 more
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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
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Earth Rotation Parameters Estimation Using GPS and SLR Measurements to Multiple LEO Satellites
Remote Sensing, 2021 Earth rotation parameters (ERP) are one of the key parameters in realization of the International Terrestrial Reference Frames (ITRF). At present, the International Laser Ranging Service (ILRS) generates the satellite laser ranging (SLR)-based ERP ...
Xingxing Li +5 more
doaj +1 more source
Downlink Cooperative MIMO in LEO Satellites [PDF]
IEEE Access, 2020 We consider a communication scheme in which two low earth orbit (LEO) satellites jointly transmit (at the same time and frequency) to a multi antenna land terminal (LT). This scheme can increase the achievable terminal throughput by up to a factor of 2, depending on the channel matrices.
Rei Richter +3 more
openaire +2 more sources
Performance Assessment of Multi-GNSS PPP Ambiguity Resolution with LEO-Augmentation
Remote Sensing, 2023 The fast motion of low Earth orbit (LEO) satellites provides rapid geometric changes in a short time, which can accelerate the initialization of precise point positioning (PPP).
Qin Li +4 more
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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
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Trends in LEO Satellite Handover Algorithms [PDF]
2021 Twelfth International Conference on Ubiquitous and Future Networks (ICUFN), 2021 In this paper, we review well-known handovers algorithms in satellite environment. The modern research trends and contributions are proposed and summarized in order to overcome their considering problems in satellite-air-ground integrated network environment caused by the fast movement of Low Earth Orbit (LEO) satellite and related frequent handover ...
S.-K. Park, Joongheon Kim
openaire +2 more sources
Integrated Precise Orbit Determination of Multi-GNSS and Large LEO Constellations
Remote Sensing, 2019 Global navigation satellite system (GNSS) orbits are traditionally determined by observation data of ground stations, which usually need even global distribution to ensure adequate observation geometry strength.
Xingxing Li +8 more
doaj +1 more source