On 01/30/2013 09:00 PM, Gong Zhang wrote: > Hi, > My last topic "Synchronize multiple USRP-N210s"may be a big one which > gives no reply.If I want to synchronize two USRPs without cable or > GPSDO,I should design a synchronization protocol.Simply A sends some > time-stamped samples to B ,then B record local time when receiving these > samples.Knowing the distance between them,we can synchronize B with > A.Apparently the synchronization accuracy depend on we make the > timestamps in which level.Ethernet involve in 10s of microseconds jitter > shows that we should do it on FPGA.Does UHD have this function? > Any comments will be valuable to me. > Thanks.
Start here, you can do this with plain UHD in C++ or with the gnuradio gr-uhd component in python or C++: http://code.ettus.com/redmine/ettus/projects/uhd/wiki The sync docs should explain just about everything: http://files.ettus.com/uhd_docs/manual/html/sync.html Many examples of timed transmission and reception: http://code.ettus.com/redmine/ettus/projects/uhd/wiki#Code-Examples Awesome project/use case for these features: https://github.com/jmalsbury/pre-cog/wiki -josh > > _______________________________________________ > 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
