A frequency domain-based approach for blind MIMO system identification using second-order cyclic statistics

Authors:
K. Sabri;M. El Badaoui;F. Guillet;A. Adib;D. Aboutajdine
Affiliations:
LASPI, département GIM, Université Jean Monnet, I.U.T de Roanne, 20 avenue de paris, 42334 Roanne, France and LRIT, Faculté des Sciences, Université Mohammed V Rabat-Agdal, Mor ...;LASPI, département GIM, Université Jean Monnet, I.U.T de Roanne, 20 avenue de paris, 42334 Roanne, France;LASPI, département GIM, Université Jean Monnet, I.U.T de Roanne, 20 avenue de paris, 42334 Roanne, France;LRIT, Faculté des Sciences, Université Mohammed V Rabat-Agdal, Morocco;LRIT, Faculté des Sciences, Université Mohammed V Rabat-Agdal, Morocco
Venue:
Signal Processing
Year:
2009

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Abstract

This article introduces a new frequency domain approach for either MIMO system identification or source separation of convolutive mixtures of cyclostationary signals. We apply the joint diagonalization algorithm to a set of cyclic spectral density matrices of the measurements to identify the mixing system at each frequency bin up to permutation and phase ambiguity matrices. An efficient algorithm to overcome the frequency-dependent permutations and to recover the phase, even for non-minimum-phase channels, based on cyclostationarity is also presented. The new approach exploits the fact that each input signal has a different and specific cyclic frequency. Simulation examples are presented to illustrate the effectiveness of this approach.