Kalman filters are optimal only if they work with statistical processes
that can be described with derivatives or integrals, i.e. white phase noise
(f^0), white FM (f^-2), random walk FM (f^-4) and so on.
Most of VCOs are heavily flicker FM dominated
Il giorno gio 21 apr 2022 alle ore 19:09 Erik K
-time. There is also a gyro with a Kalman filter running on a
> real-time operating system which is supposed to reduce the effect of
> vibrations. It does not eliminate that effect entirely but it does mitigate
> it by a factor of 10.
>
> On Mon, Mar 7, 2022 at 2:11 PM Mattia Rizzi
can't see how it could
> possibly "know" its own frequency error/uncertainty. What would it
> reference to? I'll try asking the manufacturer anyway.
>
> Regards,
> Krishna
>
> On Mon, Mar 7, 2022 at 11:46 AM Mattia Rizzi
> wrote:
>
> > Hello Kris
Hello Krishna,
what is your end application? How far away are those boards?
If each SDR can communicate to each other, you can run PTP over an ad-hoc
Layer 1.
I was able to get timestamps out of a 2.4 GHz chirp-based protocol with
less than 0.5ns RMS noise and two-way ranging error down to 10-20
ce
You can have a look at morion.com.ru
They sell small quantities, no trade license. I think the only product that
can meet the -120 dBc at 1 Hz (10 MHz carrier) is the MV336, which is
expensive
Il giorno lun 10 gen 2022 alle ore 10:03 Norman Reitz via time-nuts <
time-nuts@lists.febo.com> ha scritt
Hello!
I just started a new job with a project involving laser synchronization.
The idea of my colleague is to use basically DMTD as a phase detector (RF 3
GHz, IF=10..20MHz), and then digitize the IF with ADCs.
He is very worried about AM/PM conversion (he's looking for something like
0.1degree/dB
Hi Attila, everyone,
very interesting discussion!
>People talk of aliasing and sampling,
but do not describe where the sampling happens in the first place.
After all, it's a time-continuous system and as such, there is no
sampling.
I would say that the sampling occurs when you're using only a sli
Hello!
I published a paper on WR time distribution performance that you might
consider interesting. It's available at IEEExplorer:
https://ieeexplore.ieee.org/document/8400550/
Abstract:
This article investigates the ultimate limits of White Rabbit (WR), an
high-accuracy time distribution system b
