pymultifracs.psd.welch_estimation# pymultifracs.psd.welch_estimation(signal, fs, n_fft=4096, seg_size=None)# Wrapper for scipy.signal.welch Parameters: signal1D-array_likeTime series of sampled values fsfloatSampling frequency of the signal n_fftint, optionalLength of the FFT desired. If seg_size is greater, n_fft = seg_size. seg_sizeint | NoneLength of Welch segments. Defaults to None, which sets it equal to n_fft Returns: psdPSD