How to subtract average value from a signal?

Hi all,

I have this case where I add offset in analog circuit to a signal and then once I sample the signal, I want to remove this offset by the same value. Has anyone got any ideas how to calculate and subtract offset of this signal in MATLAB?

Answer 1

[Image Analyst]

Did you try using minus instead of plus?

yNew = y + offset;  % What you've already done.
% Now subtract from the signal using the "minus" operation
yNew2 = yNew - offset;  % Should equal the original y signal.

offset can be whatever you want. If you want it to be the average of the signal do

offset = mean(y);
offset = mean(yNew);  % Or this if you want.