Analysis of self-noise in clock recovery using arbitrary nonlinearity

The author describes an analytical method by which the in-phase and quadrature spectra of self-noise in a clock recovery circuit using arbitrary nonlinearity can be computed. The analytical results are confirmed by simulation using a time-truncated Nyquist pulse having a raised-cosine rolloff. In contrast to previous work which computed the spectra of discretized output of the nonlinearity operator, this analysis computes spectra for the continuous signal. Significant differences between results based on the discretized model and those based on the continuous model are illustrated by an example