Broadcast FM radio with hackRF and SDR
This is the block diagram I used to broadcast the content of a file over FM radio frequencies. GNU Radio is the SDR tool I use. Here the file is in Wav file format so I converted an mp3 song to a wav file using an online converter tool.
The blocks used are explained in my previous post of listening to FM radio. We first listened to the radio channel in the given frequency, and then as I run the flow graph the program got jammed. When the real radio was brought near the hackRF antenna, the channel we tuned to started playing the song in the Wav file.