Independent component analysis P18

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Independent component analysis P18

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Methods using Time Structure The model of independent component analysis (ICA) that we have considered so far consists of mixing independent random variables, usually linearly. In many applications, however, what is mixed is not random variables but time signals, or time series. This is in contrast to the basic ICA model in which the samples of have no particular order: We could shuffle them in any way we like, and this would have no effect on the validity of the model, nor on the estimation methods we have discussed. If the independent components (ICs) are time signals, the situation is quite...

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