Jonas, one idea is to add a method "set_K(K)" to the viterbi class. This method sets d_K AND calls the set_multiple() method with the new value. This method will be called from , say , the python code.
Achilleas On Sat, Oct 23, 2010 at 1:59 PM, "Jonas M. Börner" <jonas.boer...@rwth-aachen.de> wrote: > Dear Achilleas, > > I use your Viterbi implementation in a dynamic ressource allocation framework > for OFDM. Data is processed frame-wise and in general, every frame carries a > different number of coded bits. So I need to tell the Viterbi the number of > trellis steps in each step. As far as I can see, there is no way yet to use > this block like this since I have to specify the number of trellis steps at > initialization. I tried to feed a integer source to the block and read d_K in > general_work() from where but the main problem is, that I cannot reset the > set_output_multiple thing. If I don't use set_output_multiple function the > assertion that noutput_items has to be integer multiple of d_K fails. > > I'd appreciate any hints you can give me. :) > > Jonas > > Am 19.08.2010 um 10:19 schrieb Achilleas Anastasopoulos: > >> Jonas, >> >> there is a very extensive doc file in gr-trellis that hopefully >> answers your questions, >> as well as a lot of examples. >> Please read it and let me know if you still have questions about it. >> BTW: your issue has nothing to do with truncation as was suggested in a >> reply. >> >> In short: one way to implement your system is to mapp the encoded >> symbols directly to >> QPSK symbols (essentially this is what you are doing!) and thus >> produce 5 demodulated symbols >> that you will feed in the VA. >> >> Achilleas > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
