Moment-based SNR estimation over linearly-modulated wireless SIMO channels
In this paper, we develop a new method for signal-to-noise ratio (SNR) estimation when multiple antenna elements receive linearly-modulated signals in complex additive white Gaussian noise (AWGN) spatially uncorrelated between the antenna elements. We also derive extensions of other existing moment-...
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Veröffentlicht in: | IEEE transactions on wireless communications 2010-02, Vol.9 (2), p.714-722 |
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Sprache: | eng |
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Zusammenfassung: | In this paper, we develop a new method for signal-to-noise ratio (SNR) estimation when multiple antenna elements receive linearly-modulated signals in complex additive white Gaussian noise (AWGN) spatially uncorrelated between the antenna elements. We also derive extensions of other existing moment-based SNR estimators to the single-input multiple-output (SIMO) configuration. The new SIMO SNR estimation technique is non-data-aided (NDA) since it is a moment-based method and does not rely, therefore, on the a priori knowledge or detection of the transmitted symbols; it does not require the a priori knowledge of the modulation type or order. The new method is shown by Monte Carlo simulations to clearly outperform the best NDA moment-based SNR estimation methods in terms of normalized root mean square error (NRMSE) over QAM-modulated transmissions, namely the M 2 M 4 method and the estimators referred to, in this paper, as the GT and the M 6 methods, even when we extend them to the SIMO configuration. |
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ISSN: | 1536-1276 1558-2248 |
DOI: | 10.1109/TWC.2010.02.081719 |