DRM/DRM+ Digital Radio Mondiale
Revision as of 10:51, 15 March 2012
There are some good options in order to receive and transmit DRM30 and DRM+ currently available.
Dream The great free software DRM30 receiver and transmitter (see here to use Dream with USRP). Look for Pappradio for an affordable receiver hardware to use with Dream.
Spark free (but not free software) DRM30/DRM+ (also FM/RDS and AM/AMSS) transmitter that supports direct RF output (possible hardware options include the USRP and Diragen). Also supports the use of the royalties-free codec CELT.
Sodira free (but not free software) DRM30/DRM+ receiver. To receive DRM+ one option is to use a VHF to HF downconverver (FMC 108-28 is a good option) together with a receiver like Pappradio (remember to turn off all band-pass filters). Other option for DRM+ reception is the USRP, using GRC - examples here - to grab the I/Q channels and output it to a VAC, then to RateMonkey, and then to Sodira. We believe there is bug (bug confirmed by the author) in the DRM+ decoder of Sodira, that causes a drop of the SNR until a complete loss of sync after some seconds.
Diorama, Matlab implementation of a DRM receiver.
Receivers modification to get the DRM signal on a soundcard
See also DRM_trial_II_in_Sottens reporting a test transmission made with Spark, USRP and an amateur radio amplifier on the decommissioned MW transmitter mast of Sottens
