Phase shift after filtering
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Hallo Community! I collected acceleration data with 300Hz and filtered them using a cutoff of 4.5Hz. As a result I get my filtered data but slighly shifted (see attached file).
Does anyone have an idea how to deal with this problem?
Thank you and have a nice weekend
Christian
Answers (1)
Star Strider
on 28 Apr 2017
0 votes
Use the Signal Processing Toolbox filtfilt function rather than the filter function. The filtfilt function has a maximally-flat phase response for all filters, regardless of design, so there is no phase distortion. (The hardware or continuous-time maximally-flat phase Bessel filter cannot be realised as a discrete filter.)
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on 28 Apr 2017
on 28 Apr 2017
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