Prediction error method for second-order blind identification

Authors:
K. Abed-Meraim;E. Moulines;P. Loubaton
Affiliations:
Dept. of Electr. & Electron. Eng., Melbourne Univ., Parkville, Vic.;-;-
Venue:
IEEE Transactions on Signal Processing
Year:
1997

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Abstract

Blind channel identification methods based on the oversampled channel output are a problem of current theoretical and practical interest. In this paper, we introduce a second-order blind identification technique based on a linear prediction approach. In contrast to eigenstructure-based methods, it will be shown that the linear prediction error method is “robust” to order overdetermination. An asymptotic performance analysis of the proposed estimation method is carried out, consistency and asymptotic normality of the estimates is established. A closed-form expression for the asymptotic covariance of the estimates is given. Numerical simulations and investigations are finally presented to demonstrate the potential and the “robustness” of the proposed method