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Principal component analysis (PCA) is a linear dimensionality reduction technique. It reduces a multivariate dataset to a smaller set of constructed variables preserving as much information (as much variance) as possible. These variables, called principal components, are linear combinations of the input variables.
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Separating two complex-valued datasets that have been multiplied together
I think I know what problem you're trying to solve, and the problem is way too underconstrained to approach in this fashion. If you had additional information about A or B then you could use deconvol …