Re: [Discuss-gnuradio] Info regarding replacing USB with Infiniband Optical Fiber

[Martin Dvh]

Rohit Gupta wrote:
> Hi,
> 
> We are working on using GNURadio for using it as RF node capable of
> 2*2/4*4 MIMO. All the RF nodes are connected to very big FPGA like the
> one used in "Berkeley Emulation Engine (BEE)" using "Infiniband"
> Optical Fiber. All the signal processing is implemented in "BEE"
> hardware. We wanted to replace USB with Infiniband so that we can send
> raw ADC/DAC samples to/from BEE processing engine. It would be very
> helpful if some body could give us pointers on how to do this so that
> we can reuse most of the design of GNUradio board.
> 
> Also, I have come across some people using two GNURadio boards for 4*4
> MIMO. Is there a document which describes how to synchronize the LOs
> of two GNURadio boards for coherent MIMO processing and program two
> GNURadio boards for 4*4 MIMO??
Read this document, it should explain it:
gnuradio-examples/python/multi_usrp/README

(online available as
http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-examples/python/multi_usrp/README
)

Also read:
http://gnuradio.org/trac/wiki/USRPClockingNotes

Make sure you understand the hardware requirements, have the right cables, and 
set the usrp clock input and output accordingly.

I wrote the code to enable this and have experience in using it.
I you have any questions or problems getting it to work feel free to ask.

Greetings,
Martin

> 
> Thanks,
> Rohit
> 
> 
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