"Power spectrum" computes the power spectrum or power spectral density according to the Wiener-Khintchine theorem
of the given signal x, where denotes the Autocorrelation function of x.
Internally, the power spectrum is computed by performing a Fast Fourier Transform within a window slided along the signal.
Parameters of "Power spectrum" are
Note: The type of window function and type of Fast Fourier Transform can be adjusted in the Basic Options menu under Fourier.
- window length N in samples
- window overlap M in samples.
Warning: Note that y(0) is suppressed in order to avoid its large values dominating the result.
y = PowerSpect(x,N,M);
Amplitude spectrum, Phase spectrum.