Removing drift from EMG signal

Question

nigel moos 2022-4-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1695975-removing-drift-from-emg-signal

回答： Chunru 2022-4-14

i want to remove the drift from my emg signal that i obtained. i am using the following script

the original emg looks like this:

with the scipt above i get the following detrend:

u can see that the drift isnt completely removed, can anyone see what i am doing wrong or what i can change in my script to get the perfect result around y=0

thanks in advance!

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Star Strider 2022-4-14

One option woould be to calculate the fft of the signal to see where the low-frequency variations are, then using a highpass filter to pass everything above those frequencies. That should eliminate the baseline variations.

It will be necessary to experiment to determine the best cutoff frequency.

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