Sampling Rate Conversion

The topic of this article is conversion of the signal with given sampling frequency to signal with another sampling rate. The task is to change the sampling rate from fvz3=500Hz to fvz4=360Hz. There are two methods; in the text are called Method A and Method B. The Method B has two approximations, f...

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Bibliographic Details
Published inAdvances in electrical and electronic engineering Vol. 8; no. 1; pp. 10 - 14
Main Author Jan Vitasek
Format Journal Article
LanguageEnglish
Published VSB-Technical University of Ostrava 01.01.2010
Subjects
converting
decimator
integrator
low-pass filter
sampling rate
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Summary:The topic of this article is conversion of the signal with given sampling frequency to signal with another sampling rate. The task is to change the sampling rate from fvz3=500Hz to fvz4=360Hz. There are two methods; in the text are called Method A and Method B. The Method B has two approximations, first and second order. The basic idea of Method A is to find the least common multiple. It has to use integrator (low-pass filter, cut frequency is half of original signal) and decimator (low-pass filter, cut frequency is half of final signal). At first the zero samples are pasted, these are filtered by low-pass filter and then the computed samples are selected. The method B is not so exacting for computation, because the integrate factor is smaller, than in the method A. Of course, there are used integrate filters (low-pass filter). The first order approximation selects the nearer sample of both border samples. The second order approximation interpolates samples by line. Selected sample is therefore more accurate.
ISSN:1336-1376
1804-3119