Signal Preprocessing of Multiwavelets
نویسنده
چکیده
Orthogonal wavelet bases have been developed using multiple mother wavelet functions. Applying the discrete multiwavelet transform requires the input data to be preprocessed to obtain a more economical decomposition. Four characteristics of a preprocessing method are presented: length, degree, orthogonality and frequency response. A minimal preelter is deened to have length one and highest attainable degree. For the GHM Multiwavelet speciic preelters are discussed, including a minimal matrix preelter and a repeated signal preelter. The characteristics of each preelter are obtained. The performance of the preelters are discussed in respect to these characteristics.
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