On the MIMO Capacity with Imperfect CSI
نویسندگان
چکیده
Multiple-input multiple-output (MIMO) antenna systems provide high capacity gain over a single-antenna system. This gain is maximised when channel state information (CSI) is available at the transmitter. In practice, however, only partial information could be obtained. In this paper, we shall present a study of the MIMO system capacity in the case of imperfect CSI. It is found that in the case of partial or imperfect CSI the capacity depends on the statistical properties of the error in the CSI. Based on the knowledge of statistical distributions of the deviations in CSI knowledge, a pre-coding strategy which maximises a capacity upper bound is proposed and evaluated.
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