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• W1969451335 abstract "We discuss approaches for blind source separation where we can use more sensors than sources to obtain a better performance. The discussion focuses mainly on reducing the dimensions of mixed signals before applying independent component analysis. We compare two previously proposed methods. The first is based on principal component analysis, where noise reduction is achieved. The second is based on geometric considerations and selects a subset of sensors in accordance with the fact that a low frequency prefers a wide spacing, and a high frequency prefers a narrow spacing. We found that the PCA-based method behaves similarly to the geometry-based method for low frequencies in the way that it emphasizes the outer sensors and yields superior results for high frequencies. These results provide a better understanding of the former method." @default.
• W1969451335 created "2016-06-24" @default.
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• W1969451335 date "2006-03-20" @default.
• W1969451335 modified "2023-10-12" @default.
• W1969451335 title "Geometrical Interpretation of the PCA Subspace Approach for Overdetermined Blind Source Separation" @default.
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• W1969451335 doi "https://doi.org/10.1155/asp/2006/71632" @default.
• W1969451335 hasPublicationYear "2006" @default.
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