Bruce,
Bruce Griffiths wrote:
There are some excellent papers on the subject; start with
the one by Rubiola:
<
http://www.femto-st.fr/~rubiola/pdf-articles/journal/2005rsi-hi-res-freq-counters.pdf
>
There are additional papers (perhaps Bruce can locate them).
In particular, there is one paper that corrects some mistakes of
Rubiola, Australian if I remember correctly.
Yes, the paper by Dawkins, McFerran and Luiten:
http://ieeexplore.ieee.org/Xplore/login.jsp?url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F4318993%2F4318994%2F04319178.pdf%3Farnumber%3D4319178&authDecision=-203
<http://ieeexplore.ieee.org/Xplore/login.jsp?url=http%3A%2F%2Fieeexplore.ieee.org%2Fiel5%2F4318993%2F4318994%2F04319178.pdf%3Farnumber%3D4319178&authDecision=-203>
Yes, many thanks.
This article by J.J. Snyder, "An Ultra-High Resolution Frequency Meter",
FCS #35, is very useful:
http://www.ieee-uffc.org/main/publications/fcs/proceed/1981/s8110464.pdf
It describes an hardware implementation of a zero dead-time counter
(crude!) implementing the algorithm. It performs the averaging in the
way I described earlier. The above paper by Snyder is the inspiration to
the original MDEV paper published in for the same conference and
directly following:
David W. Allan and James A. Barnes, "A modified Allan Variance with
increased oscillator characterization ability", FCS #35.
http://www.ieee-uffc.org/main/publications/fcs/proceed/1981/s8110470.pdf
From the same conference exists a summary paper of Howe, Allan and
Barnes on measurements, spending time on comparing over-lapping and
non-overlapping estimators, effective use of data, DF/EDF, chi-square
etc. etc.
Cheers,
Magnus
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