Signal recovery using a cascade adaptive filter: Application to ultrasonic testing of heterogeneous media

P. A. Gaydecki

doi:10.1088/0957-0233/8/2/008

Signal recovery using a cascade adaptive filter: Application to ultrasonic testing of heterogeneous media

P. A. Gaydecki^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The basic principles of an adaptive filter implemented in discrete space are discussed, and an algorithm for a two-stage cascade adaptive filter using the least-mean-squares method is given. The filter was employed to process digitised low-frequency ultrasonic signals propagated through concrete, obtained under a variety of transducer/sample coupling conditions. Very significant levels of signal recovery were possible with waveforms initially exhibiting poor signal-to-noise ratios arising from high levels of amplifier gain.

Original language	English
Pages (from-to)	162-167
Number of pages	6
Journal	Measurement Science and Technology
Volume	8
Issue number	2
DOIs	https://doi.org/10.1088/0957-0233/8/2/008
Publication status	Published - Feb 1997

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title = "Signal recovery using a cascade adaptive filter: Application to ultrasonic testing of heterogeneous media",

abstract = "The basic principles of an adaptive filter implemented in discrete space are discussed, and an algorithm for a two-stage cascade adaptive filter using the least-mean-squares method is given. The filter was employed to process digitised low-frequency ultrasonic signals propagated through concrete, obtained under a variety of transducer/sample coupling conditions. Very significant levels of signal recovery were possible with waveforms initially exhibiting poor signal-to-noise ratios arising from high levels of amplifier gain.",

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AB - The basic principles of an adaptive filter implemented in discrete space are discussed, and an algorithm for a two-stage cascade adaptive filter using the least-mean-squares method is given. The filter was employed to process digitised low-frequency ultrasonic signals propagated through concrete, obtained under a variety of transducer/sample coupling conditions. Very significant levels of signal recovery were possible with waveforms initially exhibiting poor signal-to-noise ratios arising from high levels of amplifier gain.

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Signal recovery using a cascade adaptive filter: Application to ultrasonic testing of heterogeneous media

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