Software Defined Radio Capture The Signal (SDRCTS)
Learn software defined radio with gnuradio
Solve riddles about digital signals, modulations and other systems in gnuradio. A CTS is one of the best possibilities to learn a lot in a short time.
Difficulty level: Beginner to medium.
Note: This is an online project, you do NOT need a 39C3 ticket!
https://sdrcts.tildepipe.org