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Adaptive modulation for transmitter antenna diversity mobile radio systems

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3 Author(s)
Shengquan Hu ; Spreadtrum Commun. Corp., Santa Clara, CA, USA ; Duel-Hallen, A. ; Hallen, H.

Adaptive transmission techniques such as adaptive modulation and transmitter antenna diversity have been proposed for mobile wireless systems to satisfy high data-rate service requirements. In rapidly time variant channels, these methods need the knowledge of future fading conditions and therefore require accurate long range fading prediction. We investigate three combined adaptive modulation and transmitter diversity schemes in conjunction with our previously proposed long-range fading channel prediction (LRP) algorithm. It is demonstrated that the novel combined schemes achieve significantly higher data rates than conventional adaptive modulation methods when aided by the LRP. Performance-complexity trade-off for several combined adaptive methods is examined. In addition to utilizing the Jakes fading model to test the proposed methods, we validate the LRP for antenna diversity systems using a novel realistic fading channel model.

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Information Theory, 2002. Proceedings. 2002 IEEE International Symposium on

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