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

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] USRP network based spectrum analyzer
Date: Wed, 28 Sep 2011 16:54:05 -0400
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:7.0) Gecko/20110922 Thunderbird/7.0

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.


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.

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