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Re: [Discuss-gnuradio] USRP2 + WBX How to use a 32 MHz signal band?

From: Per Zetterberg
Subject: Re: [Discuss-gnuradio] USRP2 + WBX How to use a 32 MHz signal band?
Date: Wed, 01 Dec 2010 12:19:08 +0100

On Tue, 2010-11-30 at 08:27 -0800, Vladutzzz wrote:
> I am interested in this 2 USRPs approach since I don't have the experience
> and the knowledge to start messing about inside the FPGA firmware code and
> have an extra USRP2.
> How would this go?
> I tried looking up some info about this topic but currently the
> ettus.com/... resources seem to be down. I've read some bits and pieces on a
> few forums. Most of the info is about having one USRP2 module as a
> transmitter and the other as a receiver.
> I want them both to be receivers(actually half a receiver) and to complete
> each other by receiving half of the 32 MHz band (so each would receive 16
> MHz).
> How would the USRPs be connected to the same computer?
> How will the two 16 MHz bands be attached together to form the 32 MHz one
> (some kind of 2:1 multiplexing - I'm just guessing here)?
> I am aware of the great load exerted upon the system resources, but I'm
> trying to make this work anyway. 
> Thanks.
> Vlad.

My suggestion would be to connect the two USRP2s as a MIMO pair, but
tune them with 16MHz offset relative to each other. Then you would need
to design a way (a signal processing method) to merge the two streams
together into a single wide-band stream. 


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