Blind Separation of Nonstationary Sources by Spectral Decorrelation
نویسندگان
چکیده
This paper demonstrates and exploits some interesting frequency-domain properties of nonstationary signals. Considering these properties, two new methods for blind separation of linear instantaneous mixtures of mutually uncorrelated, nonstationary sources are proposed. These methods are based on spectral decorrelation of the sources. The second method is particularly important because it allows the existing time-domain algorithms developed for stationary, temporally correlated sources to be applied to nonstationary, temporally uncorrelated sources just by mapping the mixtures in the frequency domain. Moreover, it sets no constraint on the variance profile, unlike previously reported methods.
منابع مشابه
From Time-domain Separation of Stationary Temporally Correlated Sources to Frequency-domain Separation of Nonstationary Sources
This paper demonstrates and exploits some interesting frequency-domain properties of nonstationary signals. Considering these properties, a new method for blind separation of linear instantaneous mixtures of mutually uncorrelated, nonstationary, real sources is proposed which is based on spectral decorrelation of the sources. It allows the existing timedomain algorithms developed for stationary...
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