[USRP-users] posting did not go through

Marcus D. Leech mleech at ripnet.com
Mon Mar 21 12:30:29 EDT 2016

On 03/21/2016 11:25 AM, Thomas Wagner via USRP-users wrote:
> I sent this message a few days ago.
> I have both a B210 and an E310.  I am using GRC.   I don't understand 
> how to set up the ports with USRP source and sync to use the devices 
> in MIMO mode.   I get single channel (B210) to work using the default 
> ports.   I would like to transmit on one port and receive on two ports 
> both channels I/Q to do phase comparison for radar processing.   I 
> have the latest stable GNUradio and UHD.
> Can anyone please help with this?
> Regards,
> Tom
Something to understand about B2xx and E3xx, is that the RFFE chip 
precludes any kind of 2x1 or 1x2 MIMO configuration--it's either
   1x1 or 2x2--this is a limitation of the RFFE chip, and "making it 
nice" in the FPGA would consume a lot of space that is usefully occupied
   by other things.

Attached is an absolutely bare-bones flow-graph showing setup for 2x2 
MIMO with a B210.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20160321/62af5c50/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: mimo_2_2.grc
Type: application/gnuradio-grc
Size: 41762 bytes
Desc: not available
URL: <http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20160321/62af5c50/attachment.grc>

More information about the USRP-users mailing list