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On the sensitivity of the transmit MIMO Wiener filterwith respect to channel and noise second-order statistics uncertainties,

Liavas Athanasios, Tsipouridou,D

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URI: http://purl.tuc.gr/dl/dias/C8B6E478-07CB-4911-A699-54DCF3C6AFB8
Έτος 2008
Τύπος Δημοσίευση σε Περιοδικό με Κριτές
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Λεπτομέρειες
Βιβλιογραφική Αναφορά D. Tsipouridou and A. P. Liavas,“On the sensitivity of the transmit MIMO Wiener filter with respect to channel and noise second-order statistics uncertainties,” IEEE Trans. Signal Proc., vol. 56, no. 2, pp. 832 - 838, Febr. 2008.doi: 10.1109/TSP.2007.907840 https://doi.org/10.1109/TSP.2007.907840
Εμφανίζεται στις Συλλογές
Δημοσιεύσεις σε Περιοδικά στην Κοινότητα Σχολή Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών

Περίληψη

We consider the sensitivity of the transmit multiple-input multiple-output (MIMO) Wiener filter with respect to channel and noise second-order statistics (SOS) uncertainties. Using results from matrix perturbation theory, we derive second-order approximations to the excess mean-square error (EMSE) induced by using the channel or noise SOS estimates as if they were the true quantities. Assuming optimal training and sufficiently high signal-to-noise ratio (SNR), we develop simple and informative approximations to the EMSE, which indicate that the channel estimation errors are much more significant than the noise SOS estimation errors. Uncertainties due to channel time variations induce EMSE that increases with increasing SNR and asymptotically tends to a constant value.

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