Blind Source Separation of Linear Mixtures with Singular Matrices
- Cite this paper as:
- Georgiev P., Theis F.J. (2004) Blind Source Separation of Linear Mixtures with Singular Matrices. In: Puntonet C.G., Prieto A. (eds) Independent Component Analysis and Blind Signal Separation. ICA 2004. Lecture Notes in Computer Science, vol 3195. Springer, Berlin, Heidelberg
We consider the Blind Source Separation problem of linear mixtures with singular matrices and show that it can be solved if the sources are sufficiently sparse. More generally, we consider the problem of identifying the source matrix S ∈ IRnxN if a linear mixture X = AS is known only, where A∈ IRmxn, m ≤ n and the rank of A is less than m. A sufficient condition for solving this problem is that the level of sparsity of S is bigger than m–rank(A) in sense that the number of zeros in each column of S is bigger than m–rank(A). We present algorithms for such identification and illustrate them by examples.
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