Hello Stephan, thank for your reply. What I would like to do is more simple than that: I need to synchronize tx and rx of the same USRP, not of two different devices. But I need continuous streaming and not burst.
Any help in this direction is much appreciated. Thanks. Best, Daniele On 22/07/2014 19:14, Stefan Wunsch wrote: > Hey Daniele, > > I have done the radar toolbox and implemented a synced USRP interface > (USRP Echotimer). > > You are right, the USRP Echotimer does align the timestamps of the TX/RX > commands on both USRPs. But if you connect them by MIMO, the time and > clock are pretty good in sync. Therefore I think the Echotimer can > provide a sync with an accuracy of at least +- 1 sample. Check out [0] > for a video of the sync. There is also a sync setup for testing > (gr-radar/examples/usrp). Unfortunately the documentation is not > finished yet. > > But care: The Echotimer bursts only a packet in sync, it does not stream > the whole time! The packet is defined by a tagged stream. > > Greetings, > Stefan > > [0] > https://grradar.wordpress.com/2014/06/17/synchronisation-echotimer-usrp-interface/ > > Am 22.07.2014 18:40, schrieb Daniele Nicolodi: >> On 22/07/2014 18:18, Martin Braun wrote: >>> On top of what Marcus' has said, >>> >>> the gr-radar toolbox might be helpful. It has a block that takes a >>> tagged stream, and outputs a signal it acquired synchronously to the >>> transmitted one. >> >> Thanks Martin. This seems to imply that there is no way to actually >> synchronize the hardware, and that the synchronization can only be done >> in software aligning the timestamps of the two streams. Is that the case? >> >> Thanks. Cheers, >> Daniele >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> [email protected] >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
