Filtering method for using DFT ideal filter to digital signal

The invention relates to digital signal processing, particularly filtering of digital signal by DFT ideal filter, including the steps of applying the Hilbert transformation in original signal trace, calculating instantaneous envelope, calculating phase function, filtering the phase function with DFT...

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Bibliographic Details
Main Authors ZHU HAIBO, LIU ZHICHENG, FANG WUBAO
Format Patent
LanguageChinese
English
Published 20.08.2008
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:The invention relates to digital signal processing, particularly filtering of digital signal by DFT ideal filter, including the steps of applying the Hilbert transformation in original signal trace, calculating instantaneous envelope, calculating phase function, filtering the phase function with DFT ideal filter and last calculating output function. The use of the invention for digital signal filtering field improves the filtering performance without substantially Gibbs effect.
Bibliography:Application Number: CN2007163948