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• W2031149397 abstract "Structured covariances occurring in spectral analysis, filtering and identification need to be estimated from a finite observation record. The corresponding sample covariance usually fails to possess the required structure. This is the case, for instance, in the Byrnes-Georgiou-Lindquist THREE-like tunable, high-resolution spectral estimators. There, the output covariance Σ of a linear filter is needed to initialize the spectral estimation technique. The sample covariance estimate Σ, however, is usually not compatible with the filter. In this paper, we present a new, systematic way to overcome this difficulty. The new estimate Σ <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>ο</sub> is obtained by solving an ancillary problem with an entropic-type criterion. Extensive scalar and multivariate simulation shows that this new approach consistently leads to a significant improvement of the spectral estimators performances." @default.
• W2031149397 created "2016-06-24" @default.
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• W2031149397 date "2012-02-01" @default.
• W2031149397 modified "2023-09-25" @default.
• W2031149397 title "A Maximum Entropy Enhancement for a Family of High-Resolution Spectral Estimators" @default.
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• W2031149397 doi "https://doi.org/10.1109/tac.2011.2161842" @default.
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