I'm working on a project whose aim is to develop measurements of acceleration with an accelerometer, I have made ??measurements 10.24kS sampled, stored in CSV files, measurements were performed for two seconds, which means I have 20.48 kS. I need to convert the acceleration signal to a new speed signal using integration. Then I apply the FFT to acquire the spectrum of the speed signal with a Hanning or Hamming window. But I do not know how to do any of these steps. If anyone has any idea how to do it, I appreciate your help.