As most of you likely have seen, I’ve been working on a flowhraph for
some time. Using gr-drm and an external FM processor, I have made a sort
open alternative to HD Radio…because fun.
Anyway, the DRM signals are sampled at 48khz and the FM portion at 192.
remainder of the graph is 384k due to filters. 2 bandpass filters, 4
To help you help me, I have uploaded the flow graph to Google Drive. It
require gr-drm and for your audio to be set to Jack. (Or just use null
sinks).I’m still rather new to GNURadio so…I’m sure there’s some
mistakes in there:
gr-drm - https://github.com/kit-cel/gr-drm
Stereo Tool (FM processor) - http://www.stereotool.com/download/
So, what is it supposed to do?
Two DRM signals are to sit on the outside of the FM envelope. There
only be two, but as they are interpolated, they make a mess and that’s
I put the filters there.