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A New Design Method of Wavelet Filter

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DOI: 10.38007/Proceedings.0000702

Author(s)

Shouxi Zhu

Corresponding Author

Shouxi Zhu

Abstract

FFT and wavelet transform are the two major methods for harmonic detection. Wavelet transform is a very effective time-frequency analysis tool for analyzing non steady state signals. It overcomes the shortcomings of the Fourier Transform which is completely localized in the frequency domain and completely non-local in the time domain. In this paper, we describe the application of wavelet transform for harmonic detection, and then propose a new wavelet filter design method. The filter bank constructed by this method is consistent with the arrangement order of the nodes in the decomposition of wavelet packet, so by this method, we can easily determine the corresponding frequency band of the signal.

Keywords

Fourier Transform; Wavelet Transform; Wavelet Packet; Filter; Unsteady State Signal