Zero-padding a Fast Fourier Transform (FFT) can increase the resolution of the frequency domain results (see FFT Zero Padding). This is useful

The use of FIR vs. IIR filters is discussed elsewhere at length: Pitfalls of Filtering the EEG Signal by Sapiens Lab Difference

A benchmark of fast Fourier transform (FFT) speed suggests that using the internal floating-point digital signal processing (DSP) hardware in some of