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Defect detection by ultrasonic method is limited by the pulse width.Resolution can be improved through a deconvolution process with a prioriinformation of the pulse or by its estimation. In this paper a regularizationof the Wiener filter using wavelet shrinkage is presented for the estimation ofthe reflectivity function. The final result shows an improved signal to noiseratio with better axial resolution.

Blind Deconvolution of Ultrasonic Signals Using High-Order Spectral Analysis and Wavelets