Re: [Discuss-gnuradio] Handling of IQ files

[Vitt Benv]

Happy to read you replay Henry!
Feel free to rip/change/upgrade my work, but let me know about ur progress, pse!
Remember that it's fairly resource hungry ( file larger that 250 Mb
crashes the app also on my I7/16Gb), but it's a starting point.
I think that with GNURADIO it's possible to refine this task... I've a
lot to study!

Victor I3VFJ

2016-03-21 20:45 GMT+01:00 Henry Barton <address@hidden>:
> I like the concept of your program. It looks just like what I’m trying to
> write.
>
> Sent from Windows Mail
>
> From: Vitt Benv
> Sent: ‎Sunday‎, ‎March‎ ‎20‎, ‎2016 ‎4‎:‎16‎ ‎PM
> To: address@hidden
>
> Hi,
> this [ https://sourceforge.net/projects/automodrecog/ ] is my little
> effort about handling IQ files.
> The input IQ file is recorded with HDSDR, very nice piece of sw, that
> as a good recording scheduler. By the way the file provided can be
> played with it. I do also some tests with IQ file produced by R&S
> EM100 receiver.
> I wrote this [horrible] application for personal use and it's very raw
> IMO....
> I'm interested on HF monitoring and the main goal is to find SSB
> emission along time, not quite simple task.
>
> In brief:
> - read params from input file
> - split it in smaller chunk and save FFT for each chunk
> - sum (maxhold) or avg (average) all the FFTs
> - find relevant ( over threshold) carrier and try to "pack" them to
> find "bandwidth" associated
> - build a report as .html page with a .png file that represent the result.
>
> The most difficult part is to estimate the best "threshold", and at
> the moment I'm almost stuck there.... and moreover RL reclaims my
> presence :-)
>
> ... my euro "cent" on the subject.
>
> Victor I3VFJ
>
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