Re: [Discuss-gnuradio] Clock recovery without change of phase

[Marcus Müller]

Hi George,

isn't the job of a clock recovery actually to *change* the phase of your
signal so that its original clocking is recovered?

I'm a bit confused; could you maybe elaborate on what you want to do
(what for/why/what specific output are you looking for)? Are you maybe
looking for the clock error signal?

Best regards,
Marcus


On 06/14/2017 12:26 PM, George Vardakis wrote:
> Hi all, 
>
> I need to perform clock recovery on a signal without constantly
> changing its phase. I think that the clock recovery block in Gnuradio
> does exactly that in order to maximize the energy of the signal. Is
> there any other way that does not tamper with the signal phase? 
>
> Thanks! 
>
>
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] Clock recovery without change of phase

[Federico 'Larroca' La Rocca]

Hi,
I'm not sure if I understood correctly your question, but clock recovery
(such as MM or Polyphase clock sync) takes the incoming signal and by
default outputs a sample every $T_s$ seconds (symbol time) but at the point
where the eye is widest (and thus it interpolates as needed). Once it
converges, the block's output phase should be stable (I mean, the phase
will probably still vary but it will be due to the remaining frequency
error between transmission and reception, which should be taken care of by
a Costas Loop or similar, but it is not generated by the clock
synchronization block).
best
Federico

2017-06-14 7:26 GMT-03:00 George Vardakis :

> Hi all,
>
> I need to perform clock recovery on a signal without constantly changing
> its phase. I think that the clock recovery block in Gnuradio does exactly
> that in order to maximize the energy of the signal. Is there any other way
> that does not tamper with the signal phase?
>
> Thanks!
>
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

[Discuss-gnuradio] Clock recovery without change of phase

[George Vardakis]

Hi all,

I need to perform clock recovery on a signal without constantly changing
its phase. I think that the clock recovery block in Gnuradio does exactly
that in order to maximize the energy of the signal. Is there any other way
that does not tamper with the signal phase?

Thanks!
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio