aspcore.fouriertransform.zoom_dft

aspcore.fouriertransform.zoom_dft(time_sig, M, freq_limits, samplerate)

Zoom Discrte Fourier Transform

Equivalent to czt with unit circle parameters, but here with parameters in terms of hertz to make for more intuitive use. Samples the unit circle on evenly spaced points on the interval [freq_limits[0], freq_limits[1]].

Parameters:

• time_sig (np.ndarray of shape (..., N)) – The time signal to be transformed. The transform is applied to the last axis

• M (int) – The number of frequency bins to compute.

• freq_limits (tuple of floats) – The lower and upper frequency limits to sample.

• samplerate (int) – The samplerate of the time signal.