Precision of harmonic amplitude estimation on jitter corrupted data using sine fitting

In this paper we study the effect that jitter and phase noise have on the precision of amplitude estimation of the harmonics of a periodic signal. The analysis carried out is applicable to both Three-Parameter Sine Fitting as well as Coherent Discrete Fourier Transform procedures. We consider the case where jitter and phase noise on the signal or sampling clock is small when compared with the signal period. Index Terms – Sine fitting, DFT, uncertainty, ADC, jitter, phase noise.