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On Performance of MIMO Link Adaptation in the Presence of Channel Uncertainty
Mirkovic, Jelena and Walke, Bernhard
Chair of Communication Networks (ComNets), Faculty 6, RWTH Aachen University Kontakt: Jelena Mirkovic
In Proceedings of 4th IEEE International Conference on Wireless and Mobile Computing, Networking and Communications 2008, p. 6, Avignon, France, 2008.
Publication Date: Oct, 2008
On page(s):6
ISBN: 978-0-7695-3393-3
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In this paper, link level adaptation algorithms in a
system applying spatial multiplexing in the presence of channel
uncertainty are considered. The first part of this paper deals
with the impact of accuracy of the channel knowledge on
the post-processing Signal-to-Noise Ratio (SNR) of transmitted
multiple streams. This is evaluated by means of correlation
coefficient between post-processing SNR values corresponding to
the estimated and used channel matrix.
In the second part of this paper, two link adaptation algorithms
are introduced: the first algorithm adapts the modulation and
coding scheme to the post-processing SNR level, whereas the
second one searches for the optimum MIMO scheme (antenna
selection) and does afterwards the adaptation of modulation and
coding as well. Algorithms’ performance is evaluated assuming
perfect channel knowledge and in the presence of channel
uncertainty. The two algorithms show different gains when the
channel knowledge is accurate, but also different sensitivity to
channel knowledge imperfections.
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@INPROCEEDINGS{MirkovicWiMob2008,
AUTHOR = {Mirkovic, J. and Walke, B.},
TITLE = {On Performance of MIMO Link Adaptation in the Presence of Channel
Uncertainty},
YEAR = {2008},
MONTH = {Oct},
PAGES = {6},
ADDRESS = {Avignon, France},
BOOKTITLE = {Proceedings of 4th IEEE International Conference on Wireless and Mobile
Computing, Networking and Communications 2008},
AFFILIATION = {Chair of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
ISBN = {978-0-7695-3393-3},
URL = {http://www.comnets.rwth-aachen.de}
}
Signature in CN-Library = {Qi 036}
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| | Letzte Änderung: 4.12.2008 11.20 | |
