Link adaptation in mobile satellite links: schemes for different degrees of CSI knowledge

Summary We consider the problem of modulation and coding scheme selection in the return link of a mobile satellite system. We propose to use an affine combination of both open loop and closed loop signal quality indicators to perform this selection. The combination weights are dynamically adapted ac...

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Bibliographic Details
Published in:International journal of satellite communications and networking 2016-09, Vol.34 (5), p.679-694
Main Authors: Rico-Alvariño, Alberto, Arnau, Jesus, Mosquera, Carlos
Format: Article
Language:English
Subjects:
Adaptation
Algorithms
Channels
Dynamical systems
Exchange
link adaptation
Links
MCS selection
mobile satellite
Modulation
open loop
rate adaptation
Satellite communications
stochastic programming
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Summary:Summary We consider the problem of modulation and coding scheme selection in the return link of a mobile satellite system. We propose to use an affine combination of both open loop and closed loop signal quality indicators to perform this selection. The combination weights are dynamically adapted according to the acknowledgement/negative acknowledgement (ACK/NAK) exchange between both ends, without making any assumptions on the channel distribution; this adaptation procedure is obtained as a stochastic programming solution to an optimization problem. We further extend our analysis to the particular case of not having information on the channel state, exploiting only ACK/NAK exchange for the rate selection problem. Simulation results will show the good performance of the proposed affine‐combination method compared with previous algorithms, and its robustness to environment changes. Copyright © 2015 John Wiley & Sons, Ltd. We propose a hybrid scheme for link adaptation in the return link of satellite communications that exploits both open‐loop and closed‐loop CSI. The scheme is robust against the lack of knowledge about the type of channel and adjusts autonomously to different mobile speeds.
ISSN:1542-0973
1542-0981
DOI:10.1002/sat.1164