N210 MIMO configuration

[rafael.acurcio]

Hi all,

I'm trying to use 2 USRPs to use 1 TX and 2 RX at the same time.
I connected both with mimo cable but thare's something that I don't understand.
When I use the command uhd_find_devices I get

--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
    type: usrp2
    addr: 192.168.10.2
    name:
    serial: E6R22NBUP


--------------------------------------------------
-- UHD Device 1
--------------------------------------------------
Device Address:
    type: usrp2
    addr: 192.168.10.2
    name:
    serial: E6R22NBUP

2 devices with the same address, and same serial.

I'm using GNUradio, and I can't get any signal in the USRPs Sources (RX). The files generated by the File sink are just empty (0 Kb).
I'm not sure about what should I do now.

In annex my configuration for the USRP source.

[rafael.acurcio]

I have changed the IP address of one of the USRPs. However I still can not get any data from the USRP Source -> File Sink.

[Skirpt]

Hi Rafael,

It makes sense that the IP addresses were the same you can see that the default IP address is 192.168.10.2 in section 3 of the following Whtie Paper http://www.ni.com/white-paper/13880/en/. I'm glad that you were able to change the IP address of the second device. I would recommend looking at section 5 of the same White Paper. Have you tried running examples to see if you get the same result?

[rafael.acurcio]

Hi Skirpt,

Thanks for your reply. For my project I'm usgin GNURadio instead of MATLAB or LABview.

While using the MIMO cable I couldn't use both antennas in each USRP. When I tryed to use both USRPs sending and receiving data in each antenna the receiving signal was void. However when I tried to just read from both USRPs it was aparently working fine.

[Skirpt]

Rafael,

Have you ever been successful in sending data? It seems that is where the issue is originating.

[rafael.acurcio · Accepted solution]

Skirpt,

After some tests I finally managed to use both USRPs using the MIMO cable.

Thanks for your help