Linear Response
While Allan variance is intended to be used to distinguish noise forms, it will depend on some but not all linear responses to time. They are given in the table:
| Linear effect | time response | frequency response | Allan variance | Allan deviation |
|---|---|---|---|---|
| phase offset | ||||
| frequency offset | ||||
| linear drift |
Thus, linear drift will contribute to output result. When measuring a real system, the linear drift or other drift mechanism may need to be estimated and removed from the time-series prior to calculating the Allan variance.
Read more about this topic: Allan Variance
Famous quotes containing the word response:
“Perhaps nothing in all my business has helped me more than faith in my fellow man. From the very first I felt confident that I could trust the great, friendly public. So I told it quite simply what I thought, what I felt, what I was trying to do. And the response was quick, sure, and immediate.”
—Alice Foote MacDougall (1867–1945)