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Absolute FFT Beginner Project

Posted: Mon Aug 26, 2019 9:04 pm
by alemages
Hello all. As the title says I am an absolute beginner when it comes to DSP. I purchased a RTL2832u(?) with the hopes to learning how IQ FFT and how to translate the data to a freq vs amp type view in a Python program.

All the documentation I find is so headsy that I can't quite figure out what I actually need to make my own display. The I/Q data, sample rate, sample bins, resolution, I'm having a hard time connecting the dots on how they relate. Does anything have any good practical material I can read to understand how this giant puzzle goes together?

Thanks!

Re: Absolute FFT Beginner Project

Posted: Tue Aug 27, 2019 6:31 pm
by hotpaw2
There are pointers to SDR DSP tutorials right on this site:
https://www.rtl-sdr.com/tag/digital-signal-processing/

Plus more tutorials online, with source code, such as:
https://www.g0kla.com/sdr/index.php

The ARRL also has pointers to some resources:
http://www.arrl.org/software-defined-radio
Here's one QEX article that says it "minimizes" the math:
http://www.arrl.org/files/file/Technolo ... qex013.pdf

Re: Absolute FFT Beginner Project

Posted: Wed Aug 28, 2019 1:11 pm
by alemages
Hotpaw2 thank you for the information!

Re: Absolute FFT Beginner Project

Posted: Thu Jul 02, 2020 9:23 am
by makero
hotpaw2 wrote:
Tue Aug 27, 2019 6:31 pm
There are pointers to SDR DSP tutorials right on this site:
https://www.rtl-sdr.com/tag/digital-signal-processing/

Plus more tutorials online, with source code, such as:
https://www.g0kla.com/sdr/index.php

The ARRL also has pointers to some resources:
http://www.arrl.org/software-defined-radio
Here's one QEX article that says it "minimizes" the math:
http://www.arrl.org/files/file/Technolo ... qex013.pdf
Thanks for the good links and tutorials! I'm a newbie, so this helps me a lot. :) :idea: