Improved PARAFAC Based Blind MIMO System Estimation
Yuanning Yu, Athina P. Petropulu · 2006
We consider the problem of frequency domain identification of a multiple-input multiple-output (MIMO) system driven by white, mutually independent unobservable inputs. In particular, we improve upon a method recently proposed by the authors [1] that uses PARAFAC decomposition of a tensor that is formed based on higher-order statistics of the system output. The approach of [1] utilizes only one slice of the output tensor at each time. We here proposed an approach that fully exploits the information in the output tensor, and as a result achieves lower error values. The proposed approach can also be applied to systems with more inputs than outputs.