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Dyadic wavelet transform based real signal multiscale hilbert transform and extraction of instantaneous frequency |
Cai Yu; Liu Guizhong; Hou Xingsong |
Institute of Information Engineering Xi an Jiaotong University Xi an 710049 China |
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Abstract In this paper , the method for designing digital filters and their implementation and application via filter banks are introduced. The design of digital Hilbert filters of each scale in dyadic wavelet filter banks is particularly discussed. Moreover, this method, which based on multiscale Hilbert filtering methods, is applied to the extraction of the instantaneous frequency and obtains a better denoising result compared with the traditional DWT denoising method.
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Received: 06 December 2000
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