Independent component analysis of largely underdetermined mixtures
Lieven De Lathauwer, Bart De Moor, Joos P. L. Vandewalle, J.-F. Cardoso · 2003
In this paper we derive algebraic means for Independent Component Analysis (ICA) with more sources than sensors. The results are based on the structure of the fourth-order cumulant tensor. We derive bounds on the number of sources that generically guarantee uniqueness of the decomposition. The mixing matrix is computed by means of simultaneous diagonalization or off-diagonalization techniques.