Some links, in case you didn't read them yet: http://www.nt.tu-darmstadt.de/uet/fguet/mitarbeiter/vf/
http://www.nt.tu-darmstadt.de/uet/fguet/mitarbeiter/vf/papers/Talk_HFRadio2003.pdf Jens On Sat, May 06, 2006 at 08:35:27AM -0500, Brett L Trotter wrote: > I've been working in a similar vein, but like you, I lack the GNURadio > specific knowledge. > > I seek a DRM (Digital Radio Mundial) implementation and have some > serious time pressure to come up with one. > > I've reduced worked on the DRM (drm.sourceforge.net) code to get it to > compile properly without a GUI- it's not a far step from there to get it > down into just a library we might be able to link in. > > It includes many/all of the components you spoke of. > > I haven't investigated license compatibility, but a double blind rewrite > could escape any of that (EG someone reads the code and writes detailed > documentation then another person writes the code based on the > documentation only without seeing the original code). > > In any case, perhaps if we could answer the license question, our goals > are one in the same and could work with Eric Blossom (who has offered > lending some advice) to get this completed. > > What is your timeframe? > > Jens Elsner wrote: > > Hello everybody, > > > > I'd like to implement the physical layer of the DAB standard in GNURadio. > > The resulting code of should be as versatile as possible since the basic > > basic OFDM concept is the same for a lot of standards. > > > > Blocks that should be reusalbe are > > > > - OFDM time and frequency synchronization > > -> should be based *only* on cyclic prefix correlation > > Performance is worse but standard independend. > > - carrier-to-symbol mapping > > - frequency (de)interleaver > > > > Apart from OFDM: > > - matrix time (de)interleaver > > - symbol mapping > > - QAM decoder > > - Differential coding > > - (de)scrambling > > - Viterbi decoder / convolutional encoder > > > > All these tasks are very common. I'd like to write a general version > > first and then adapt these blocks through inheritance for DAB. > > > > Some of the functionality exists already in the ATSC implementation. But I > > feel > > there should be a general concept about how to integrate these blocks > > into GNURadio. > > > > So far I'm not familiar with the details of GNURadio. Is someone working > > in this direction? What could be adapted from other free software > > projects? > > > > Jens > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio