Removing drift from EMG signal
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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
le 14 Avr 2022
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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Chunru
le 14 Avr 2022
%% detrend
% Remove polynomial trend
t = 0:20;
x = 3*sin(t) + t;
y = detrend(x);
plot(t,x,t,y,t,x-y,':k')
legend('Input Data','Detrended Data','Trend','Location','northwest')
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