AN ALGEBRAIC APPROACH TO BLIND MIMO IDENTIFICATION

Lieven De Lathauwer, Bart De Moor and Joos Vandewalle
email: Lieven.DeLathauwer@esat.kuleuven.ac.be

This paper deals with the blind identification of multiple­ input multiple­output (MIMO) finite impulse response (FIR) filters. We limit ourselves to the case of 2 out­ puts and 2 inputs with values in R. After a classi­ cal prewhitening, the remaining problem is the blind identification of a paraunitary filter. For this task, we derive a multilinear algebraic algorithm. This proce­ dure is a generalization of the algorithm for indepen­ dent component analysis (ICA) described in [1]. The performance is illustrated by means of some numerical experiments.