To voltage waveform sampling n points, how to use the discrete Fourier transform, the waveform of the fundamental wave and the frequency of the harmonic decomposition, hope to be able to explain to a computer program, or use formula to explain, thanks

CodePudding user response:

I work ten years, the FFT code on the net, haven't read it, may be not to really use it every time,

CodePudding user response:

Check the function of the open source library FFTW. Look at the tutorial, will slowly, I wish you good luck!