Hierarchical wavelet packet fuzzy inference system for pattern classification and system identification

A. Sharifi, M. Shoorehdeli and M. Teshnehlab

International Journal of Systems Science, 2013, vol. 44, issue 1, 109-126

Abstract: This study presents a hierarchical Takagi–Sugeno–Kang type fuzzy system called hierarchical wavelet packet fuzzy inference system. In the proposed method, wavelet packet transform is applied on the input data to produce approximation and detail sub-bands of the input data and the output is used as the input vector of the proposed network. This network uses a hierarchical structure same as wavelet packet decomposition tree, in which adaptive network-based fuzzy inference system is used as sub-model. Also, gradient descent algorithm is chosen for training the parameters of antecedent and conclusion parts of the sub-models. In order to evaluate the capability of the proposed method, its applications in pattern classification, system identification and time-series prediction have been studied. The results show that the proposed method performs better than the other conventional models.

Date: 2013
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DOI: 10.1080/00207721.2011.583998

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