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Analysis of multiexponential transient signals using interpolation-based deconvolution and parametric modeling techniques

Salami, Momoh Jimoh Eyiomika and Ismail, Z. (2003) Analysis of multiexponential transient signals using interpolation-based deconvolution and parametric modeling techniques. In: International Conference on Industrial Technology 2003, 10-12th December 2003, Maribor, Slovenia.

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Abstract

Previous work has shown that the deconvolution technique is one of the most effective procedures for analyzing transient exponentially decaying signals. Direct deconvolution approach often leads to poor resolution of ihe estimated decay rates since the fast Fourier transform (FFT) algorithm is used to analyze the resulting deconvolved data. One of the most promising approaches is based on optimal inverse Xltering followed by fitting an autoregressive moving average ( A M ) model to the deconvolved data so that its AR parameters are determined by solving high order Yule- Walker equations (HOYWE) via the singular value decomposition (SVD) algorithm. Many desirable results have been obtained by using this technique for both clean and noisy signals. However, the real-time implementation of this algorithm poses some diflculties since nonlinear transformation is involved in such analysis. One method of overcoming this d1ficulty is by incorporating the spline interpolation algorithm into the nonlinear preprocessing procedure. The performance of the proposed algorithm in accurately estimating the number of exponential signals and their corresponding exponential consfanis for both simulated and real data is investigated in this paper. Results of analysis have shown that high-resolution estimates of decay constants are obtained when the proposed algorithm is used to analyze multiexponential signals with varied signal-tonoise (SNR) ratio.

Item Type: Conference or Workshop Item (Full Paper)
Additional Information: 3352/6945
Subjects: T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Mechatronics Engineering
Depositing User: Prof Momoh-Jimoh Salami
Date Deposited: 08 May 2013 14:41
Last Modified: 08 May 2013 14:41
URI: http://irep.iium.edu.my/id/eprint/6945

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