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- W1996390423 abstract "To estimate precisely the mixing matrix and extract the source signals in underdetermined case is a challenging problem, especially when the source signals are non-disjointed in time-frequency (TF) domain. The conventional algorithms such as subspace-based achieve blind source separation exploiting the sparsity of the original signals and the mixtures must satisfy the assumption that the number of sources that contribute their energy at any TF point is strictly less than that of sensors. This paper proposes a new method considering the uncorrelated property of the sources in the practical field which relaxes the sparsity condition of sources in TF domain. The method shows that the number of the sources that exist in any TF neighborhood simultaneously equals to that of sensors. We can identify the active sources and estimate their corresponding TF values in any TF neighborhood by matrix diagonalization. Moreover, this paper proposes a method for estimating the mixing matrix by classifying the eigenvectors corresponded to the single source TF neighborhoods. The simulation results show the proposed algorithm separates the sources with higher signal-to-interference ratio compared to other conventional algorithms." @default.
- W1996390423 created "2016-06-24" @default.
- W1996390423 creator A5003873405 @default.
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- W1996390423 date "2011-07-01" @default.
- W1996390423 modified "2023-10-16" @default.
- W1996390423 title "Underdetermined blind separation of non-disjoint signals in time–frequency domain based on matrix diagonalization" @default.
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- W1996390423 doi "https://doi.org/10.1016/j.sigpro.2010.12.015" @default.
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