Absolute FFT Beginner Project

Show off any of your RTL-SDR or cheap SDR related projects.
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alemages
Posts: 2
Joined: Mon Aug 26, 2019 8:33 pm

Absolute FFT Beginner Project

Post by alemages » Mon Aug 26, 2019 9:04 pm

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!

hotpaw2
Posts: 137
Joined: Sat Jan 14, 2017 11:07 pm
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Re: Absolute FFT Beginner Project

Post by hotpaw2 » 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

alemages
Posts: 2
Joined: Mon Aug 26, 2019 8:33 pm

Re: Absolute FFT Beginner Project

Post by alemages » Wed Aug 28, 2019 1:11 pm

Hotpaw2 thank you for the information!

makero
Posts: 1
Joined: Thu Jul 02, 2020 9:20 am

Re: Absolute FFT Beginner Project

Post by makero » Thu Jul 02, 2020 9:23 am

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:

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