[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
receive-only.

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

Please see:

http://files.ettus.com/uhd_docs/manual/html/sync.html

Cheers,
Ben
----------------------------
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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