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- W2151024466 abstract "In recent years, downlink multi-user multiple-input multiple-output (MU-MIMO) transmission techniques have attracted much attention because of their potential to significantly increase system capacity compared to single-user (SU) transmission. Unfortunately, accurate channel state information at the transmitter (CSIT) is crucial for these techniques to efficiently separate multiple users in the space domain so as to realize their capacity gain. In practice however accurate CSIT is difficult to obtain. In this letter we investigate the impact of imperfect CSIT on the system performance in terms of sum-rate scaling law for systems employing MU-MIMO decomposition scheme for downlink transmission. In particular, we derive the sum-rate scaling factors for various system configurations and find that imperfect CSIT has different effects on different categories of system configurations. Simulation results demonstrate the accuracy of our analysis." @default.
- W2151024466 created "2016-06-24" @default.
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- W2151024466 date "2009-01-01" @default.
- W2151024466 modified "2023-10-18" @default.
- W2151024466 title "On the sum-rate scaling law of downlink MU-MIMO decomposition transmission with fixed quality imperfect CSIT" @default.
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- W2151024466 doi "https://doi.org/10.1109/t-wc.2009.080400" @default.
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