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- W2970698825 abstract "Time Division Duplexing (TDD) Massive MIMO (MaMIMO) relies on channel reciprocity to derive the channel state information at the transmit side (CSIT) from the uplink (UL) channel estimates. This reciprocity is impacted by the transmit and receive front ends which are non-reciprocal and hence a calibration is required to obtain the downlink (DL) channels from the UL channel estimates. The Cramer-Rao Bound (CRB) for reciprocity calibration and an optimal algorithm were derived in [1], [2] recently. In this work, we extend this and derive a generalized CRB that applies to both coherent and non-coherent calibration schemes (introduced in [1]). More importantly, we provide original mean squared error analysis for the commonly used Least-Squares (LS) estimator under different parameter constraints, and relate it to the CRB. Finally, we compare some antenna grouping strategies for calibration based on their CRB." @default.
- W2970698825 created "2019-09-05" @default.
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- W2970698825 date "2019-07-01" @default.
- W2970698825 modified "2023-09-27" @default.
- W2970698825 title "Performance Analysis of Reciprocity Calibration in Massive MIMO" @default.
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- W2970698825 doi "https://doi.org/10.1109/spawc.2019.8815591" @default.
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