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Infinite impulse response filters for direct analysis of interferogram data from airborne passive Fourier transform infrared spectrometry by Toshiyasu Tarumi; Gary W. Small; Roger J. Combs; Robert T. Kroutil is a Chemistry article available to read on EtoBox.

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Infinite impulse response (IIR) filters and support vector machines (SVMs) are applied to interferogram data to implement the automated detection of heated ethanol plumes by airborne passive Fourier transform infrared (FT-IR) spectrometry. To simulate monitoring of industrial emissions, the spectrometer is mounted in a downward-looking mode on a fixed-wing aircraft and used to detect plumes released from a portable emission stack. Both IIR and finite impulse response (FIR) filters having similar frequency responses are designed and applied to the interferogram data to extract the information associated with the ethanol C-O stretching band at 1066 cm À1 . This study investigates the effects of distortions in the interferogram introduced by the nonlinear phase responses of the IIR filters on the ability of the SVMs to recognize ethanol. In addition, three ways to apply the filters to the interferogram are explored. These studies reveal that the phase distortion introduced by the IIR filters causes no measurable degradation in classifier performance. This allows the intrinsically lower filter order of the IIR filters to be used to reduce the length of the interferogram segment require

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Author

Toshiyasu Tarumi; Gary W. Small; Roger J. Combs; Robert T. Kroutil

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0924-2031)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)