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Dynamic Cooperative Spectrum Sharing in a Multi-Beam LEO-GEO Co-Existing Satellite System
IEEE Transactions on Wireless Communications, 2021Among the existing satellite types, Low Earth Orbit (LEO) satellites provide short round-trip delays and are becoming increasingly important. Due to its low orbital profile, the LEO satellites can provide high-speed, low-latency and no dead zone network ...
Pengwenlong Gu +3 more
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Integrated satellite-HAP systems
IEEE Communications Magazine, 2005Thus far, high-altitude platform (HAP)-based systems have been mainly conceived as an alternative to satellites for complementing the terrestrial network. This article aims to show that HAP should no longer be seen as a competitor technology by investors of satellites, but as a key element for an efficient hybrid terrestrial-satellite communication ...
CIANCA, ERNESTINA +6 more
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Acta Astronautica, 1978
Abstract In December 1974 and September 1975 two SYMPHONIE satellites were launched and successfully placed at 11.5° west longitude in the geostationary orbit. These satellites operate in the 4–6 GHz frequency band. Four transmission channels, each 90 GHz wide, are available for the experimental telecommunications mission. The spacecraft transponders
Burkhard R.K. Pfeiffer +1 more
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Abstract In December 1974 and September 1975 two SYMPHONIE satellites were launched and successfully placed at 11.5° west longitude in the geostationary orbit. These satellites operate in the 4–6 GHz frequency band. Four transmission channels, each 90 GHz wide, are available for the experimental telecommunications mission. The spacecraft transponders
Burkhard R.K. Pfeiffer +1 more
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Doppler Interference Analysis for OTFS-Based LEO Satellite System
IEEE Journal on Selected Areas in CommunicationsLow Earth orbit (LEO) satellite system has revolutionized the way to provide wireless seamless access on a global scale. One of the primary limitations is the low data rates resulting from Doppler shifts induced by the high mobility of LEO satellites ...
Ruimao He +3 more
semanticscholar +1 more source
Journal of Telemedicine and Telecare, 1999
Satellite communication is a technique which has been used in telemedicine, often for educational purposes. Almost all of the work has concerned the use of fixed satellite terminals. Mobile satellite services MSS provide two-way voice and data communication from hand-held terminals, where the final link to the subscriber is by satellite.
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Satellite communication is a technique which has been used in telemedicine, often for educational purposes. Almost all of the work has concerned the use of fixed satellite terminals. Mobile satellite services MSS provide two-way voice and data communication from hand-held terminals, where the final link to the subscriber is by satellite.
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Satellite power system simulation
Acta Astronautica, 1997Abstract In order to furnish a useful tool for the power system preliminary sizing, a satellite power system simulator was developed. The simulator has a modular structure where each module implements the mathematical model of the system components (solar array, battery, voltage regulators etc.).
COLOMBO G +4 more
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IEEE Transactions on Aerospace and Electronic Systems, 2019
In this paper, a novel fractional-order fuzzy sliding mode control strategy is developed to realize the deployment of the tethered satellite system (TSS) with input saturation. The considered TSS is modeled as an underactuated system.
Shidong Xu +3 more
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In this paper, a novel fractional-order fuzzy sliding mode control strategy is developed to realize the deployment of the tethered satellite system (TSS) with input saturation. The considered TSS is modeled as an underactuated system.
Shidong Xu +3 more
semanticscholar +1 more source
Next‐generation global satellite system with mega‐constellations
International Journal of Satellite Communications And Networking, 2020Mega satellite constellations in low earth orbit (LEO) will provide complete global coverage; rapidly enhance overall capacity, even for unserved areas; and improve the quality of service (QoS) possible with lower signal propagation delays.
C. Ravishankar +4 more
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Satellite Communications Systems
2020ÖZET UYDU HABERLEŞME SİSTEMLERİ Modern askeri operasyonlarda uzay çok önemli bir unsurdur. Bilgi toplama, işleme ve dağıtımı konusunda uydu sistemleri eşsiz kabiliyetleri nedeniyle gelişen geleceğin muharebe sahasında bu sistemlerin önemli bir rolü vardır. 21.
Gérard Maral +2 more
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