Baby's First Modulation

GNURadio

Problem

Our listening station caught this RF recording of a guy reading off the flag. It's FM modulated.

rf1.iq: https://drive.google.com/file/d/1TSOt9YrljsE8ETSlXRsGLy3Qo8M3g3jQ/view?usp=sharing

This IQ file was saved in standard GNURadio format (complex, 32bit float I, 32bit float Q)

Author: nb

Solution

Open the .iq file in GNURadio and apply the demodulation.