Journal ArticleDOI
Link adaptation for Ka band low Earth orbit Earth Observation systems: A realistic performance assessment
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TLDR
The results manifest that under particular conditions, link adaptation offers throughput improvements of up to 100% against non-adaptive transmission schemes in Ka band LEO EO systems.Abstract:
SUMMARY
In this paper, a proposal is sketched for realizing high data rate downlinks in next-generation Ka band low Earth orbit (LEO) Earth Observation (EO) systems. The work aims at realistically assessing the throughput advantage stemming from link adaptation strategies—embraced by most wireless and satellite communication standards—compared with non-adaptive transmission, which is the approach followed in conventional X band EO systems. The transmission strategies examined include constant, (static and dynamic) variable, and adaptive flavors of coding and modulation, each representing a different performance/system complexity trade-off. Practicality is pursued to the extent possible by incorporating state-of-the-art orbital, ground station, spacecraft, propagation, physical layer, and system implementation characteristics. The results manifest that under particular conditions, link adaptation offers throughput improvements of up to 100% against non-adaptive transmission schemes in Ka band LEO EO systems. Copyright © 2012 John Wiley & Sons, Ltd.read more
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Proceedings ArticleDOI
Atmospheric channel simulator for the simulation of propagation impairments for Ka band data downlink
Nicolas Jeannin,Maura Outeiral,Laurent Castanet,Carlos Pereira,Danielle Vanhoenacker-Janvier,Carlo Riva,Carlo Capsoni,Lorenzo Luini,Mario Cossu,Antonio Martellucci +9 more
TL;DR: In this article, the propagation conditions for Earth observation data downlink operating at the Ka band were modeled by using numerical weather forecast models to perform local high-resolution reanalysis of the meteorological conditions on which the propagation effects can be computed.
Journal ArticleDOI
Performance Evaluation of High-Frequency Mobile Satellite Communications
Yonghwa Lee,Jihwan P. Choi +1 more
TL;DR: The adverse impact of long propagation delay in the conventional satellite system is investigated with various user mobility and Doppler-shifted carrier frequency and the results are provided at high-frequency bands with high-speed user movement.
Journal ArticleDOI
Statistical Characterization of Adjacent Satellite Interference for Earth Stations on Mobile Platforms Operating at Ku and Ka Bands
TL;DR: This letter analytically derives the statistical distribution of the carrier-to-noise-plus-interference ratio (CNIR) due to adjacent satellite interference for Earth stations on mobile platforms operating in Ku and Ka frequency bands.
Proceedings Article
A tool for synthesizing rain attenuation time series in LEO Earth observation satellite downlinks at Ka band
TL;DR: In this article, the authors provide a tool for synthesizing rain attenuation time series in LEO EO satellite downlinks at the Ka band, where more spectrum is available but atmospheric effects combined with the motion of the LEO satellite form a new propagation environment.
Journal ArticleDOI
Space-Time Stochastic Rain Fading Channel for Multiple LEO or MEO Satellite Slant Paths
TL;DR: A novel time series synthesizer ofRain attenuation is proposed which incorporates the spatial correlation of rain attenuation for multiple Low Earth Orbit or Medium Earth Orbit (MEO) satellite links and it extends the well-known Maseng–Bakken model for multiple Earth-LEO or MEO satellite links.
References
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Adaptive Feedback Communications
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Journal ArticleDOI
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Journal ArticleDOI
DVB‐S2 modem algorithms design and performance over typical satellite channels
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