Fig. 2.
Illustration of the effect of frequency detuning with fixed frequency components {fi = (i + 1)/(β × T)}, where T is the total time span and β = 1.0 for the classical Fourier decomposition (steelblue dots) and β = 1.05 for the detuned case (brown dots). Lower panel: input sinusoidal signal (black line) and the Fourier fit (yellow line – there is no β dependence on this scale).
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