WLC38-4: Impact of Channel Prediction on Adaptive Modulation Performance in V-BLAST Systems

Since the accuracy of channel prediction influences the performance of adaptive multiple-input-multiple-output (MIMO) systems in Rayleigh fading channels, we analyze the performance of adaptive V-BLAST systems with minimum-mean-square-error (MMSE) channel predictor in this paper. Considering the channel prediction error, we obtain the closed- form expressions for bit-error-rate (BER) and throughput of adaptive V-BLAST systems, and maximize the system transmission rate by choosing optimum block length under the BER constraint. The numerical results reveal the critical value of channel prediction error below which the systems can achieve the similar transmission rate to that of the systems with perfect channel prediction.