Re: [Discuss-gnuradio] Large FFTs

[Carles Fernandez]

Dear Thomas,

we have found some problems when using USRP2+DBSRX for GPS due to
phase noise. See details in http://www.ruby-forum.com/topic/213845

If someone have succeded on this, we would appreciate some hints to
make it work. Our software GPS receiver was not able to track signals,
while it run smoothly when using USRP1 + DBSRX without modification.

Best regards,
Carles Fernandez




On Mon, Aug 23, 2010 at 10:00 AM, Thomas Hobiger <address@hidden> wrote:
> We are considering to purchase a USRP2 + a DBSRX board in order to utilize
> it for some GPS stuff. Thus it would be interesting to know what's the
> maximum supported (implemented) FFTs size. I have checked the old
> discussions, but there's nothing really conclusive. What we are looking for
> is something larger than 16K FFT points.
> Maybe someone has experiences with such large FFTs and how they perform
> (Flops or FFTs per second)?
>
> Best regards,
>  Thomas Hobiger
>
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> Dr. Thomas Hobiger
> Space-Time Measurement Project
> Space-Time Standards Group
> New Generation Network Research Center
> National Institute of Information and Communications Technology
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