Results 201 to 210 of about 6,615 (256)

Performance study of low Earth-orbit satellite systems

IEEE Transactions on Communications, 1994
The performance of low-earth-orbit satellite systems is investigated in terms of the average number of beam-to-beam handoffs, the average number of satellite-to-satellite handoffs, the channel occupancy distribution, and the average call drop probability.
A Ganz
exaly   +2 more sources

Inter-satellite ranging in the Low Earth Orbit

2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP), 2016
Many satellite systems require knowledge about inter-satellite distances. Inter-satellite links provide direct connectivity between satellites and may be used for ranging, while they remove the need of dedicated hardware. This paper addresses inter-satellite ranging at the Low Earth Orbit (LEO) using S-Band signals. We take the requirements from recent
Mohammad Alawieh   +3 more
openaire   +1 more source

Performance of Low Earth Orbit Satellite Systems with Coding

Wireless Personal Communications, 2002
The effect of block, convolutional and Turbo coding on the probability of error and the capacity are investigated for CDMA Low Earth Orbit (LEO) Satellite systems. The model employed assumes a contaminated Gaussian traffic model to be more compatible with different population areas.
Hebatallah M. Mourad   +3 more
openaire   +1 more source

Image Metrics for Deconvolution of Satellites in Low Earth Orbit

2020 35th International Conference on Image and Vision Computing New Zealand (IVCNZ), 2020
Satellites and space debris clutter low Earth orbital paths, causing concern for future launches as the clutter increases the probability of in-orbit collisions. Therefore, it is important to track and characterise these objects. However, Earth’s atmosphere distorts images collected from ground-based telescopes, which can be reduced through post ...
Sierra Hickman   +3 more
openaire   +1 more source

Eclipse Prediction Algorithms for Low-Earth-Orbiting Satellites

IEEE Transactions on Aerospace and Electronic Systems, 2017
Earth-orbiting satellites experience a partial or full eclipse when they pass through the night side of the Earth. These eclipse events can have significant impacts on the satellite due to the dramatic change of the solar radiation incident. It is therefore essential to propose a high-precision eclipse prediction algorithm or even a space-borne ...
Xianghua Jia   +3 more
openaire   +1 more source

Yaliny's protocol for low earth orbit satellites

2015 IEEE East-West Design & Test Symposium (EWDTS), 2015
This paper presents a modification of CCSDS 131.2-R-2/DVB-S2 standard developed by Yaliny Engineering. The modification has special features — Doppler offset compensation with prior information, low latency synchronization scheme, which allows for its use on LEO satellites and patent-free LDPC codec.
openaire   +1 more source

GEO data relay for low earth orbit satellites

2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC), 2012
This paper focuses on a novel, conceptual data relay system for relaying data transfer between low earth orbit (LEO) satellites and a gateway through a geostationary earth orbit (GEO) satellite, developed in the framework of the GeReLEO project. Novel channel adaptive transmission schemes are introduced in addition to the access scheme supporting ...
openaire   +1 more source

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