Software Defined Radio
Demodulate FM signal picked up through Dipole antenna
FM Reception and demodulation is much like hello world of Radio electronics. 🚀
My simple GRC project connects to pluto-sdr as signal source, perform a bunch of signal transformation such as filtering, decimating, scaling & eventually fed to audio sink to listen to the broadcast. On successfully executing the .grc project, you should see two graphs of Power (dB) vs Frequency. I have enabled two slider/variables.
- Receiver gain
- Volume gain
you can tune into your local FM station by setting the Local oscillator of your SDR to FM channel frequency.
In my case following are valid FM stations: 91.1e6, 91.9e6, 92.7e6, 93.5e6, 94.3e6, 98.3e6 in Hz labelled as 1, 2, 3, 4, 5, 6.