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Re: [Discuss-gnuradio] Polyphase Clock Sync for Bursts

From: Usman Haider
Subject: Re: [Discuss-gnuradio] Polyphase Clock Sync for Bursts
Date: Sun, 9 Oct 2016 18:26:47 +0500

Yes, you are right here. "The time_est tag can be used to adjust the sampling timing estimate of any downstream synchronization blocks and is currently implemented by the gr::digital::pfb_clock_sync_ccf block."


On Sat, Oct 8, 2016 at 1:13 AM, Garver, Paul W <address@hidden> wrote:
So is that what the time_est tag in corr_est_cc is for? The idea being correlate against the preamble to generate an initial timing estimate for the clock recovery to lock quickly?

> On Oct 7, 2016, at 3:37 PM, Sylvain Munaut <address@hidden> wrote:
>> Does anyone have insight into how to do burst timing recovery
>> with PF clock sync block? I’ll also note it appears that the M&M clock sync
>> block experiences a similar problem.
> Both blocks are meant for continuous signal and will take a "while" to lock.
> Usually for bursts, you have a sync sequence to correlate to to get an
> initial valid alignement.
> Cheers,
>    Sylvain

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