Interpolation on same number of samples after FIR filtration
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I have made FIR filtration of my signal (sampled 25 Hz, 4500 samples) and after filtration that signal has about 200 samples less. The original signal is synced with another signal. And I need these two signals to work together and have same number of samples. What is best solution? How to interpolate filtrated signal to the same number of samples like before?
Star Strider on 3 May 2022
Filtering should not change the signal length.
I am not certain exactly what you are doing, how your designed your FIR filter, or what your signal is.
I always suggest using the filtfilt function to do the actual filtering.