[USRP-users] PPM TX

Rui Pinheiro ruipinheiro0 at googlemail.com
Fri Sep 28 11:05:02 EDT 2012

Hi Nick,

Thanx for your answer.

1. To send pulse I write to buff complex(ampl, ampl). Correct?

2. How can I send samples for zero amplitude carrier wave?

3. Is there any sample code out there?

Thanx a lot!

Am 28.09.2012 16:50 schrieb "Nick Foster" <nick at ettus.com>:

> 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
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users at lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20120928/6ea80706/attachment-0002.html>

More information about the USRP-users mailing list