Abstract
This paper addresses a method of blind source separation that jointly exploits the nonstationarity and temporal structure of sources. The method needs only multiple time-delayed correlation matrices of the observation data, each of which is evaluated at different time-windowed data frame, to estimate the demixing matrix. The method is insensitive to the temporally white noise since it is based on only time-delayed correlation matrices (with non-zero time-lags) and is applicable to the case of either nonstationary sources or temporally correlated sources. We also discuss the extension of some existing methods with the overview of second-order blind source separation methods. Extensive numerical experiments confirm the validity and high performance of the proposed method.
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Choi, S., Cichocki, A. & Beloucharni, A. Second Order Nonstationary Source Separation. The Journal of VLSI Signal Processing-Systems for Signal, Image, and Video Technology 32, 93–104 (2002). https://doi.org/10.1023/A:1016319502849
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DOI: https://doi.org/10.1023/A:1016319502849