The python generic_demod.py block uses the constellation_receiver_cb block to do both some fine-tuning of the phase and the mapping to bits. It can be found at: gnuradio/gr-digital/lib/digital_constellation_receiver_cb.cc This in turn will use the decision_maker method of the constellation object to do the mapping which can be found in: gnuradio/gr-digital/lib/digital_constellation.cc What exactly are you trying to do?
On Thu, May 31, 2012 at 8:12 PM, jiajue ou <azalea.a...@yahoo.com.cn> wrote: > Hi Ben, > > What you mean is the qam blocks in gnuradio companion are implemented in > Python only? If I want to get the complex symbols before they are demapped > to bits, I should modify related python scripts? > Thank you. > > Jia > > -----Original Message----- > From: Ben Reynwar [mailto:b...@reynwar.net] > Sent: Friday, June 01, 2012 12:39 AM > To: jiajue ou; discuss-gnuradio Discussion Group > Subject: Re: [Discuss-gnuradio] QAM Mod and QAM Demod block in GRC > > These blocks are implemented in python. > Have a look at the following two files to start off with: > gnuradio/gr-digital/python/qam.py > gnuradio/gr-digital/python/generic_mod_demod.py > > Ben > > On Wed, May 30, 2012 at 11:41 PM, jiajue ou <azalea.a...@yahoo.com.cn> > wrote: >> Hi all, >> >> >> >> I'm working on an experiment which needs to modify qam modulation >> block in gnuradio. But I cannot find the source C++ file the qam >> blocks use. e.g., OFDM demod block uses digital_ofdm_frame_sink in >> gnuradiobuild/gnuradio/gr-digital/lib. What about qam blocks? >> >> Thank you for your help! >> >> >> >> Best, >> >> jia >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
