Adaptive transmission scheme with delayed channel state information for multiuser MIMO-OFDM systems

An adaptive transmission scheme combining orthogonal space-time block code and eigen-beamforming was proposed for multiuser MIMO-OFDM downlinks. The scheme uses delayed channel state information from receivers to maximize the throughput. An adaptive subcarrier allocation criterion and corresponding...

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Veröffentlicht in:	Tongxin Xuebao S. 19 - 25
Hauptverfasser:	LIU Min, ZHANG Xiao-fei, XU Da-zhuan
Format:	Journal Article
Sprache:	Chinesisch
Veröffentlicht:	Editorial Department of Journal on Communications 01.05.2008
Schlagworte:	orthogonal frequency-division multiplexing;multiple-input-multiple-output;subcarrier allocation;bit-loading algorithm;delayed channel state information
ISSN:	1000-436X
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	An adaptive transmission scheme combining orthogonal space-time block code and eigen-beamforming was proposed for multiuser MIMO-OFDM downlinks. The scheme uses delayed channel state information from receivers to maximize the throughput. An adaptive subcarrier allocation criterion and corresponding bit-loading algorithm were pre-sented. Simulation results show that the scheme can make full use of delayed channel state information to achieve much more throughput than non-adaptive schemes. A sub-optimal bit-loading algorithm was also presented,which is non-iterative and requires small computation. Simulation results demonstrate that the incurred throughput loss is negligible.
ISSN:	1000-436X