[USRP-users] PPM TX

Nick Foster nick at ettus.com
Fri Sep 28 10:50:29 EDT 2012


One packet per complete transmission. You will run into problems with start
of burst and end of burst transients otherwise.

--n
On Sep 28, 2012 5:51 AM, "Rui Pinheiro" <ruipinheiro0 at googlemail.com> wrote:

> Hi there,
>
> according to Josh's suggestion to create a PPM transmission I checked the
> example tx_bursts. The pulse lengths time grid is 0.5 us (mircoseconds). I
> selected a TX Rate of 8MHz. That means 4 samples per pulse.
> Should the implementation be done by sending 1 packet per pulse including
> 4 samples and timed by using metadata with timespec OR just 1 packet with
> an amplitude modulated wave including the pulses (like 4 samples full ampl
> for a pulse or 4 samples zero ampl for non pulse)? Is the resolution of
> timespec sufficient (nanoseconds)?
> If you could send me a code snippet I would be very happy.
>
> Thanx a lot for your help!
>
> Rui
>
>
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>
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