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- W2938005146 abstract "Multi-User Multiple Input Multiple Output (MU-MIMO) can significantly increase the link capacity without bandwidth expansion. One promising technique is MMSE-SVD, which is a combination of minimum mean square error (MMSE) filter at the base station (BS) side and eigenmode filter generated by singular value decomposition (SVD) at user equipment (UE) side. MMSE-SVD requires BS and UEs to share the MIMO channel state information (CSI) prior to data transmission. This may cause a serious problem in a high mobility environment; the shared MIMO CSI becomes outdated and consequently, the bit-error rate (BER) performance degrades. In this paper, we propose an adaptive MMSE-SVD, which updates the transmit filter using channel prediction and the receive filter using decision-feedback channel estimation. The uncoded BER performance of adaptive MMSE-SVD for orthogonal frequency division multiplexing (OFDM) downlink and single-carrier (SC) uplink is evaluated by computer simulation. Simulation results confirmed that adaptive MMSE-SVD increases the allowable maximum Doppler frequency ( $boldsymbol{f}_{mathbf{D}}boldsymbol{T}$ ) for keeping $mathbf{BER} by about 4 times for OFDM downlink while by about 1.6 times for SC uplink." @default.
- W2938005146 created "2019-04-25" @default.
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- W2938005146 date "2018-08-01" @default.
- W2938005146 modified "2023-10-09" @default.
- W2938005146 title "Adaptive MMSE-SVD to Improve the Tracking Ability Against Fast Fading" @default.
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- W2938005146 doi "https://doi.org/10.1109/vtcfall.2018.8690881" @default.
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