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• W2605275340 abstract "This paper considers dynamic transmit covariance design in point-to-point MIMO fading systems with unknown channel state distributions and inaccurate channel state information subject to both long term and short term power constraints. First, the case of instantaneous but possibly inaccurate channel state information at the transmitter (CSIT) is treated. By extending the drift-plus-penalty technique, a dynamic transmit covariance policy is developed and is shown to approach optimality with an $O(delta)$ gap, where $delta$ is the inaccuracy measure of CSIT, regardless of the channel state distribution and without requiring knowledge of this distribution. Next, the case of delayed and inaccurate channel state information is considered. The optimal transmit covariance solution that maximizes the ergodic capacity is fundamentally different in this case, and a different online algorithm based on convex projections is developed. The proposed algorithm for this delayed-CSIT case also has an $O(delta)$ optimality gap, where $delta$ is again the inaccuracy measure of CSIT." @default.
• W2605275340 created "2017-04-14" @default.
• W2605275340 creator A5029961049 @default.
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• W2605275340 date "2015-12-28" @default.
• W2605275340 modified "2023-09-23" @default.
• W2605275340 title "Dynamic Transmit Covariance Design in MIMO Fading Systems With Unknown Channel Distributions and Inaccurate Channel State Information" @default.
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• W2605275340 doi "https://doi.org/10.48550/arxiv.1512.08419" @default.
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