Hello time-nuts community,
thanks to your feedback and that of others, I could make additional
progress on my journey to understand powerlaw noise :)
I would like to reiterate what I have learned so far. Please comment on
anything that you think is done wrong.
Hello Magnus,
I'm sorry, but I can't follow you here.
I know that time deviation values and fractional frequency values are
related via integration, so I think I understand the third line.
But I don't know what is meant especially with the first one:
What is d(t)?
What is D? Is this the
Wolfgang,
Remember to scale the double-integral right:
d(t) = D
y(t) = integrate(d(t),t) = y_0 + Dt
x(t) = integrate(y(t),t) = x_0 + y_0*t + D/2*t^2
Did you miss the 1/2 factor somewhere?
That would make sense for the Random Walk phase noise.
Cheers,
Magnus
On 03/09/2015 04:57 PM, Wolfgang
Hello Tom, hello time-nuts,
Have a look at the 20 plots in:
http://leapsecond.com/pages/allan/Exploring_Allan_Deviation_v2.pdf
Thanks for sharing the data and the PDF! It's good to have reference values.
I also had a look at the stable32 user manual [1] to see how it
calculates the PSD
On 03/06/2015 10:29 PM, Magnus Danielson wrote:
I have checked several sources, and they match up with the IEEE 1139 in
this regard.
I have also evaluated the equation for Allan variance for the random
walk noise, and it matches up with the references and what I put here:
. The raw data is at:
http://leapsecond.com/pages/allan/
/tvb
- Original Message -
From: Wolfgang Wallner wolfgang-wall...@gmx.at
To: time-nuts@febo.com
Sent: Monday, March 09, 2015 8:57 AM
Subject: Re: [time-nuts] AVAR - S_Y conversion
On 03/06/2015 10:29 PM, Magnus Danielson wrote
Wolfgang,
I have checked several sources, and they match up with the IEEE 1139 in
this regard.
I have also evaluated the equation for Allan variance for the random
walk noise, and it matches up with the references and what I put here:
On 03/05/2015 07:23 PM, Attila Kinali wrote:
Servus!
Servus :)
On Thu, 05 Mar 2015 14:35:51 +0100
Wolfgang Wallner wolfgang-wall...@gmx.at wrote:
For the random walk noise the expected line is off by a factor of
exactly 2 from the calculated plot, and I don't know how to explain this
Servus!
On Thu, 05 Mar 2015 14:35:51 +0100
Wolfgang Wallner wolfgang-wall...@gmx.at wrote:
For the random walk noise the expected line is off by a factor of
exactly 2 from the calculated plot, and I don't know how to explain this
behavior.
I'm probably the wrong one to answer, as I have
Hello time-nuts community,
I hope this is the right place for the following question :)
I'm dealing with the simulation of powerlaw noise, and I stumbled upon
something I cannot explain when I tried out some formulas of IEEE 1139 [1]:
According to Table B.2 in [1] the one-sided power spectral
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