Power and Rate Adaptation Based on Imperfect Channel Estimation over MIMO Fading Channels

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概要

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• We derive the optimum power and rate adaptation for maximizing the spectral efficiency of Multilevel Quadrature Amplitude Modulation (MQAM) over Multiple-Input Multiple-Output (MIMO) fading channels based on imperfect channel estimation. We use Pilot Symbol Assisted Modulation (PSAM)-based Minimum Mean Square Error (MMSE) channel estimator, and show that the optimum power adaptation on each sub-channel is a generalization of water-filling. We also show that the conventional water-filling (with bias) strategy for power adaptation is a suboptimum solution of the general optimization problem and it tends to the optimal solution as the correlation coefficients between eigenvalues of the true channel matrix and its estimate tend to one.

• （社）電子情報通信学会の論文
• 2008-04-01

著者

• Kobravi Alireza

  King's College London

• Shikh-bahaei Mohammad

  King's College London

関連論文

• Power and Rate Adaptation Based on Imperfect Channel Estimation over MIMO Fading Channels

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