Re: [Discuss-gnuradio] USRP network based spectrum analyzer

[Marcus D. Leech]

On 28/09/2011 4:50 PM, Phelps Williams wrote:
> I have a usrp and computer in a remote location without much network 
> bandwidth available to the system and I'm using it as a spectrum 
> analyzer.  I'd like to run the fft on the remote system and then send 
> the results to a connected client for display.  This would allow me to 
> get greater fidelity than xwindows forwarding or the ascii dft example 
> while also using less bandwidth.  I would imagine the client side 
> would potentially reuse some of the existing wx or qt interfaces for 
> display and control.
>
> This seems like a pretty useful / simple use of this hardware.  Does 
> anybody know of any implementations floating around that does this? 
>  I'd prefer not to reinvent the wheel.
>
> -Phelps
You could use a GRC-based flow-graph that computes the FFT, and outputs 
the results to a FIFO, and have a small C program that simply puts
  "snapshots" in an appropriate place.  Once it's in an "appropriate 
place" (and perhaps in a form that you like), you could use a web server
  to observe the results.  Roughly 1e6 ways of skinning this particular 
cat.