Second Order Nonstationary Source Separation

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.

• Type: Journal
• Year: 2002
• Where: VLSISP
• Authors: Seungjin Choi, Andrzej Cichocki, Adel Belouchrani
• Keywords: Blind Source Separation, Multiple Time-delayed Correlation, Time-delayed Correlation Matrices, VLSISP 2002