3rd French conference on acoustics
J. Phys. IV France 04 (1994) C5-1367-C5-1370
Identification aveugle de filtres ARMA et applicationsM. BOUMAHDI
CEPHAG/ENSIEG, Domaine Universitaire, BP. 46, 38402 Saint-Martin-d'Hères cedex, France
The blind identification of linear systems is an important problem in signal processing (communication, seismic,..). The second order statistics (Autocorrelation function, or Power Spectral Density), are blind phase, they only permit the identification of minimum phase linear time invariant systems. During the past years there has been an increasing interest in utilizing the Higher Order Statistics (HOS), to solve the problem of non-minimum phase blind identification. Because the HOS keep information about the phase. To identify ARMA filters with unknowns orders, we use all the information given by the second order statistics, and complete it by searching to maximize the kurtosis. We apply this approach to field seismic data.
© EDP Sciences 1994