Results 251 to 260 of about 1,489 (276)

Satellite constellations for a multiple LEO satellite network

Electronics and Communications in Japan (Part III: Fundamental Electronic Science), 1993
AbstractRecently, research has been very active in communication networks that could service the entire globe by using multiple, low, earth‐orbiting satellites. This has been spurred on by progress in the field of digital communication technique, technical advances of satellite launching, and a decrease in the costs of small‐sized satellites.In this ...
Tomonori Usui, Tsutomu Kawabata, Yoshikuni Onozato, Ikuo Oka   +3 more
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Perturbed ISL Analysis in LEO Satellite Constellation

2020 IEEE 3rd International Conference on Electronics and Communication Engineering (ICECE), 2020
In the satellite mobile communication systems, there are direct channels among satellites by inter-satellite link (ISL), which could increase the autonomy of the constellation network. The relative position between satellites in the low earth orbit (LEO) constellation is time-varying, and the satellites are not continuously visible.
Xiaoyi Xu, Chunhui Wang, Zhonghe Jin
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Coherent laser terminals for LEO satellite constellations

1999 IEEE LEOS Annual Meeting Conference Proceedings. LEOS'99. 12th Annual Meeting. IEEE Lasers and Electro-Optics Society 1999 Annual Meeting (Cat. No.99CH37009), 2003
Summary form only given. We present an overview of the inter-satellite optical terminal technical evolution since the beginning of ESA and German Space Agency Studies in the seventies up to the current LEO constellation optical inter-satellite link terminals as developed by Bosch.
B. Smutny, H. Zech
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5G Satellite Communications Services Through Constellation of LEO Satellites

2019
Satellite communication systems are a promising solution to extend and complement terrestrial communication networks in un-served or remote area. This aspect is reflected by recent commercial and standardisation endeavours. In particular, 3GPP recently initiated a study item for new radio-based, i.e.
Vahid Joroughi, Lars K. Alminde, Eduardo Cruz   +2 more
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Satellite Diversity to Mitigate Jamming in LEO Satellite Mega-Constellations

2021 IEEE International Conference on Communications Workshops (ICC Workshops), 2021
With current large-scale deployments of low-earth orbit (LEO) satellites, the demand for data services provided by these satellite systems is expected to increase rapidly in the near future. To provide high-quality, high-rate data services it is essential to incorporate resiliency features, such as mitigation against potential jamming threats, to these
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Mobility Management in LEO Satellite Constellations

Recently, ESA started the activity “Development of On-board IP Router Protocol Stacks for Future Satellite Systems”, with the abbreviated name On-Board Router (OBR), to identify potential of installing IP routing capabilities on board satellites.
Saadan Ansari, Richard Prinz, Miodrag Sajatovic, Guray Acar   +3 more
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Computing call-blocking probabilities in leo satellite constellations

IEEE Transactions on Vehicular Technology, 2003
We present an analytical model for computing call-blocking probabilities in a low Earth orbit (LEO) satellite network that carries voice calls. Both satellite-fixed and Earth-fixed constellations with interorbit links and handoffs are considered. We assume a single beam per satellite.
A.H. Zaim, H.G. Perros, G.N. Rouskas
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Polar LEO Satellite Constellation Measurement by Delay Probing

2006 IEEE International Performance Computing and Communications Conference, 2006
Low Earth orbit (LEO) satellite networks are capable of providing wireless connectivity seamlessly and continuously to any part of the world with guaranteed short round-trip propagation delay. As a key part of next generation network (NGN) infrastructure, next generation satellite networks are expected to support a variety of applications with diverse ...
null Junfeng Wang, null Hongxia Zhou, null Fanjiang Xu, null Mingtian Zhou   +3 more
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Navigation Augmentation based on LEO Communication Satellite Constellations

The International Technical Meeting of the The Institute of Navigation, 2018
The main objective of this work is to investigation the feasibility and performances of LEO communication satellite constellations as potential navigation augmentation platforms. The further examination of the existing and upcoming LEO communication satellites constellations has been conducted, such as Iridium, Globalstar, Teledesic, One Web, Boeing ...
Ruidan Luo, Hong Yuan, Ying Xu
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Multi Beam Forming Algorithms of LEO Constellation Satellite

2021
Since the 21st century, the development of mobile Internet and Internet of things technology has introduced new development opportunities for the field of communication satellites. A large number of researchers use multi beam technology in low earth orbit high-throughput satellite constellation to improve the performance of Internet of things services.
Bingyu Xie, Mingchuan Yang
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