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allan_modified(data,tau,name,... ALLAN_MODIFIED Compute the modified Allan deviation for a set of
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3.0 | 1 rating Rate this file 14 Downloads (last 30 days) File Size: 8.12 KB File ID: #26637

allan_modified

09 Feb 2010 (Updated 03 Nov 2010)

allan_modified.m calculates the modified Allan deviation (MDEV) of a time domain signal.

File Information
Description	allan_modified.m calculates the modified Allan deviation (MDEV) of a time domain signal. It is intended for stability analysis of frequency data. Fractional frequency or phase data sets with sample rate or time stamp information are handled.
Acknowledgements	The author wishes to acknowledge the following in the creation of this submission: allan, allan_overlap
MATLAB release	MATLAB 7.8 (R2009a)

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Everyone's Tags	adev, allan variance, frequency stability, mdev, probability, statistics
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Comments and Ratings (2)
10 Mar 2012	Brandon Bourn	This program works, it's a good addition to the allan variance frequency analysis, however, it takes a very long time to calculate. Is there any way to speed it up?
12 Mar 2012	M. A. Hopcroft	Thanks for the feedback. I do not have a secret magic button for speeding up the code :) MDEV is more complex than ADEV, so it takes longer to calculate. If you have some ideas about how to implement the algorithm, please send me an email! Note that all of the code in this series (allan.m, allan_overlap.m, allan_modified.m) runs much faster if you provide a sample rate than if you provide timestamps.

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Updates
10 Feb 2010	Description typo fix
04 Apr 2010	v1.1: bugfixes for irregular sample rates
23 Oct 2010	v1.2 synchronize with allan.m v2.2. Handle certain timestamp irregularities.
03 Nov 2010	v2.22 improve tau handling; plotting bugfix