Effective Degrees of Freedom
The degrees of freedom represents the number of free variables capable of contributing to the estimate. Depending on the estimator and noise type, the effective degrees of freedom varies. Estimator formulas depending on N and n has been empirically found to be:
| Noise type | degrees of freedom |
| white phase modulation (WPM) | |
| flicker phase modulation (FPM) | |
| white frequency modulation (WFM) | |
| flicker frequency modulation (FFM) | |
| random walk frequency modulation (RWFM) |
Read more about this topic: Allan Variance, Confidence Intervals and Equivalent Degrees of Freedom
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