DStar using GNU Radio with a ThumbDV
have built GNU Radio blocks to encode and decode DStar. These blocks use
NWDigitalRadio's ThumbDV for the vocoding. My OOT (out-of-tree) module
is at https://github.com/ac2ie/gr-ambe3000.
The DStar Decoding block is mostly complete.
The decoder prints any incoming header as well as any "slow data" in
the voice frames. (Of course the main output of the decode block is the audio stream!) A GNU Radio flow-graph for a DStar receiver is included. (See the picture below.)