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IEICE TRANSACTIONS on Fundamentals

Extraction of Desired Spectra Using ICA Regression with DOAS

Hyeon-Ho KIM, Sung-Hwan HAN, Hyeon-Deok BAE

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Summary :

Recently, DOAS (differential optical absorption spectroscopy) has been used for nondestructive air monitoring, in which the LS (least squares) method is used to calculate trace gas concentrations due to its computational simplicity. This paper applies the ICA (independent component analysis) method to the DOAS system of air monitoring, since the LS method is insufficient to recover the desired spectra perfectly due to sparsity characteristic. If the sparsity of reference spectra in the DOAS system imposes the assumption of independence, the ICA algorithm can be used. The proposed method is used to regress the observed spectrum on the estimates of the reference spectra. The ICA algorithm can be seen as a preprocessing method where the ICs of the references are used as the input in the regression. The performance of the proposed method is evaluated in simulation studies using synthetic data.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E88-A No.8 pp.2244-2246
Publication Date
2005/08/01
Publicized
Online ISSN
DOI
10.1093/ietfec/e88-a.8.2244
Type of Manuscript
LETTER
Category
Measurement Technology

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