[USRP-users] 4*4 MIMO

Ben Hilburn ben.hilburn at ettus.com
Thu Sep 13 13:20:19 EDT 2012

Farrukh -

You cannot do MIMO, of any size, with the TVRX2, because the TVRX2 is

You can receive synchronized samples across two boards, although the boards
will not maintain relative phase after a tune.

Please see:


Ben Hilburn <http://goo.gl/5DdZ3> @ Ettus Research, LLC<http://www.ettus.com/>
 |   USRP <http://goo.gl/Ixjhh>

On Tue, Sep 11, 2012 at 3:35 PM, Farrukh Aziz <farrukh59th at yahoo.com> wrote:

> Hi, I was looking at this (new) document that shows different ways of
> making a MIMO system.
> http://www.ettus.com/content/files/kb/mimo_and_sync_with_usrp.pdf
> Since it did not discuss one of the options that I have used, so I thought
> to clarify myself. Can we implement a 2*2 MIMO by using a TVRX2
> daughterboard on a USRP N210 without using any external reference signals?
> Secondly can we implement a 4*4 MIMO by using 2 USRPs (N210) each fitted
> with a TVRX2 daughterboard. The USRPs are inter linked with a MIMO cable.
> The 1 PPS and 10 MHz synch signals are provided using a GPSDO (to the
> master node). However the GPSDO is not connected with a GPS antenna.
> Please let me know if my approach is correct.
> *Farrukh Aziz Bhatti*
> Department of Electrical & Computer Engineering
> University of Auckland
> +64 21 02973964
> _______________________________________________
> USRP-users mailing list
> USRP-users at lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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