Geometric Overcomplete ICA

Zusammenfassung

In independent component analysis (ICA), given some signal input the goal is to find an independent decomposition. We present an algorithm based on geometric considerations to decompose a linear mixture of more sources than sensor signals. We present an efficient method for the matrix-recovery step in the framework of a two-step approach to the source separation problem. The second step - sourcerecovery - uses the standard maximum-likelihood approach.