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

[Marcus D. Leech]

> What would be the best way to work with a 32 MHz band resulting from USRP2?
> I guess, since the minimum decimation rate is 4 (resulting in a 25 MHz
> signal band), some kind of interpolation will be required or maybe
> resampling?!
> Any ideas on how to proceed?
> Thanks in advance!
>
> Vlad.
>    
The maximum bandwidth over the GiGE interface is 25Msps.  If you want to 
do processing at higher bandwidths, you'll
  have to dive into the UHD code and move to smaller samples (8-bits x 
2 instead of 16-bits x 2), or do your processing
  on the FPGA.  Either approach will require modifying significant 
swaths of code on the FPGA.

Also, doing anything significant to a datastream arriving at 25Msps on 
the host will require a CPU that's up to the task.
  My IRA radio astronomy code, which does spectral and radiometry 
measurements can just-barely keep up at 12.5Msps
  on a 4-core Phenom II running flat-out at 3.2GHz.


--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org