Achilleas, you can get the data and my matlab test code at:
http://1c3.de/dab_matlab_test.tar.bz2 There are two main matlab files: dab_tx_mode2.m : Sender and receiver - (almost) works. I'm getting the correct bits out. dabtest_mode2.m: Receiver with time/frequency sync using real data. The constellation diagram looks great - but I don't get any useful bits. There has to be some kind of error in the symbol mapping or channel decoding. I'm still looking for the needle in the protocol stack. Jens > >Achilleas, > > > >great. I'll then focus for now on implementing time/frequency > >synchronization. Does the decoder support puncturing? Did you publish > >you code already? > > The code is generic enough to handle any problem that can be cast as > sequence detection for a sequence generated by a trellis. This includes > puncturing, sequence detection in the presence of ISI (aka, viterbi > equalization), CPM demodulation, etc... > > >Concerning my "jitter" problem: I sampled another DAB source with the > >DBSRX daughterboard and implemented a correlation based frequency > >synchronization algorithm. That pretty much solved the problem (although > >a little jitter is still there). > > Can you post the data file? I remember that I had tried a correlation > based (joint) frequency/time synchronization algorithm with your > previous data and it didn't work... > > Achilleas _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
