Fwd: Log raw data from the usrp_spectrum_sense.py

GNU Radio
1

Marcus

This is an explicit answer and guide to the exact tutorials I needed
to
start capturing my particular dataset.

That said, a question on refinement (and I can put this on the list if
you
think there’s sufficient interest):
Rather than capturing all the spectrum “all the time” I would like to
create a GRC flowgraph (at least until I’m comfortable writing my own
code)
that will bin samples, look for a particular amplitude spike, and save
the
bin if the spike is detected. The specific application is to look at
characteristic spectra of cloud-ground and cloud-cloud lighting
impulses.

Do you have a suggestion?

Regards
Gerry
"
Hi Gerry,

I think it would be cool if you forwarded this to the list :slight_smile: Generally,
it’s never bad to ask one question too many, and if something
interesting comes out of a discussion, everyone will profit.

I think with “binning samples” you might need to channelize them into
different subbands?
You could do that with a set of band pass filters. This will surely be
functional, but will have a high computational load.
If your subbands are equally shaped, you could use the Polyphase
Channelizer to get a set of subbands, which will be much more efficient.

On each of these N subbands, you could use a squelch and only save the
passing signal into N file sinks.

Greetings,
Marcus
"

Thanks, Marcus. I’ll be looking at Polyphase Channelizer as soon as I
can
get back to that system!

Regards
Gerry

On Mon, Dec 1, 2014 at 10:29 AM, Marcus Müller
[email protected]
wrote:

that does that, or use python, octave, matlab, C, C++, or whatever you
guided tutorials 1, 2 and 3, and most of your questions will be answered :slight_smile:

collect the a wide band signal around and save the data to the txt file,

http://gnuradio.4.n7.nabble.com/Log-raw-data-from-the-usrp-spectrum-sense-py-tp51503p51506.html

[email protected]
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–
Gerry Creager
NSSL/CIMMS
405.325.6371
++++++++++++++++++++++
“Big whorls have little whorls,
That feed on their velocity;
And little whorls have lesser whorls,
And so on to viscosity.”
Lewis Fry Richardson (1881-1953)

–
Gerry Creager
NSSL/CIMMS
405.325.6371
++++++++++++++++++++++
“Big whorls have little whorls,
That feed on their velocity;
And little whorls have lesser whorls,
And so on to viscosity.”
Lewis Fry Richardson (1881-1953)