Performance loss due to imperfect parameter estimation in FDD downlink antenna array techniques^†

Antonis C. Koutalos

School of Engineering and Electronics, Institute for Digital Communications, The University of Edinburgh, Mayfield Road, EH9 3JL Edinburgh, U.K.

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John S. Thompson,

Corresponding Author

John S. Thompson

[email protected]

School of Engineering and Electronics, Institute for Digital Communications, The University of Edinburgh, Mayfield Road, EH9 3JL Edinburgh, U.K.

School of Engineering and Electronics, Institute for Digital Communications, The University of Edinburgh, Mayfield Road, EH9 3JL Edinburgh, U.K.Search for more papers by this author

Antonis C. Koutalos,

Antonis C. Koutalos

School of Engineering and Electronics, Institute for Digital Communications, The University of Edinburgh, Mayfield Road, EH9 3JL Edinburgh, U.K.

Search for more papers by this author

John S. Thompson,

Corresponding Author

John S. Thompson

[email protected]

School of Engineering and Electronics, Institute for Digital Communications, The University of Edinburgh, Mayfield Road, EH9 3JL Edinburgh, U.K.

School of Engineering and Electronics, Institute for Digital Communications, The University of Edinburgh, Mayfield Road, EH9 3JL Edinburgh, U.K.Search for more papers by this author

First published: 29 September 2004

https://doi.org/10.1002/ett.1008

^†

Part of initial results of this work has been published in Reference 1.

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Abstract

This paper examines, through simulations, the performance loss in various frequency division duplex (FDD) downlink antenna array techniques for digital mobile communication systems, when various parameters are estimated from pilot signals. Performance loss from noisy channel estimates decreases with increasing pilot signal power, while loss from channel coefficient quantisation decreases with increasing number of quantisation bits. Also, noisy channel correlation matrices lead to small loss when only the principal eigenvector is used for transmission and to much larger loss in techniques based on all eigenvectors. Finally, narrow beams are affected more than wide ones by noisy selection or feedback of the highest signal-to-noise ratio (SNR) transmit beam. Copyright © 2004 AEI.

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Volume16, Issue4

July/August 2005

Pages 291-302

Performance loss due to imperfect parameter estimation in FDD downlink antenna array techniques^†

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Performance loss due to imperfect parameter estimation in FDD downlink antenna array techniques†

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Performance loss due to imperfect parameter estimation in FDD downlink antenna array techniques^†