Hello Tarik, Just stepping in to respond that UHD does not support splitting the 10 GigE interfaces to two computers.
The X310 supports RFNoC which you could use to create an energy detection block which only streams samples back to the computer when your criteria are met. However it is likely simplest for you to do the energy detection on the host computer, streaming the full bandwidth to the computer but then only saving samples long term if your detector identifies a signal of interest. Host coding is almost invariably faster and simpler to debug than FPGA code, though of course there are cases where putting processing in the FPGA is either more efficient or provides unique benefits. In this case you could see some very good efficiency benefits if the FPGA DSP could limit the number of samples that are actually sent to the host, but it is an efficiency gain you likely don't need. Regards, Derek On Mon, Jul 9, 2018 at 11:01 AM, Tarik Kazaz via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi All, > > I am giving up hope of sampling signals of full BW of two UBX-160 cards, > and storing those streams in the PC. > Based on my calculations (one of the previous posts) in order to be able > to do that I would need to write to > memory with the speed of 1.6GBps. > > However, now I am interested in sampling short bursts of signals with the > full bandwidth of USRP x310 (so 2(cards)x2(IQ)x200MSPs) > and then storing them into PC memory for the period of 10 minutes. > > The idea would be to stream bursty signal when the signal is in the air. > > For this, I would probably need to have some sort of energy detector in > the FPGA. The idea would be that energy detector signalizes when the > > signal is in the air and to trigger streaming samples towards PC. > > > In this way, I would try to lower requirements on the speed of memory > write in the PC. > > Does anyone have experience with doing the same? > > Previously, I was interested in the possibility to connect single > USRP-X310 to two separate PCs over 10GBe interfaces > (to split dual 10GBe connection to two PCs with NVMe SSDs). In that way, > there would be a possibility to lower down > requirements on memory writing speed to 0.8GBps. These memory writing > speeds should be supported by modern > NVMe SSDs. Probably this is not straightforward to achieve as I did not > get too many replies on my previous post. More details about > > my previous posts are available here https://www.mail-archive. > com/usrp-users@lists.ettus.com/msg05579.html. > > > > Cheers, > Tarik > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >
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