Any response?
alanluo wrote: > > Hi, everyone: > > recently I have a project which need to use higher modulation scheme, such > as 16QAM or 64 QAM. I noticed that in python/gnuradio/blksimpl, there is > no demodualtion part for higher modulation schemes. Does that mean we need > to finish it by ourself? > And i also noticed that from the maillist attached as below, Tom seems > working on the modualtion models. Did he finish this work, and post at > some place i just did not find ? > > I really appreciate any help from you guys. Since I am very new to the > python language and dont have confidence to programme the model in such > short time. > > ==== > RE: constellation mapping > > by trondeau Mar 06, 2007; 05:44am :: Rate this Message: - Use ratings > to moderate (?) > > Reply | Reply to Author | Print | View Threaded | Show Only this Message >> -----Original Message----- >> From: discuss-gnuradio-bounces+trondeau=vt....@... [mailto:discuss- >> >> On Sun, Mar 04, 2007 at 06:20:07PM -0500, nj...@... wrote: >> >> > I want to do constellation mapping in pyhton. I have code that does >> > a gr.packed_to_unpacked_bb and then gr.chunks_to_symbols_bc using a >> > constellation of: >> > >> > constellation=array((1+1j,1-1j,-1-1j,-1+1j),Complex) >> >> Use this: >> >> constellation=(1+1j,1-1j,-1-1j,-1+1j) >> >> > My understanding is that this is the constellation mapping for QPSK. >> > I want to do constellation mapping for BPSK and 64-QAM. I don't >> > have a lot of GNU radio experience so I'm not really sure how to do >> > this. Is all I do is change the array (all the possibilities from >> > 4+4j to -4-4j for 64-QAM and 1+0j to -1+0j for BPSK) and the code >> > will do the rest to map the data for the other modulation schemes? >> >> Have you looked at the mpsk code that's in the tree? Most of this >> stuff is already in place. I believe that Tom Rondeau is working on >> QAM too. > ... [show rest of quote] > > Yep, you can already look in python/gnuradio/blksimpl for DBPSK and DQPSK. > I'm finishing up the tests on the new stuff now and hopefully will get > those > checked in to the trunk by the end of today. > > This will include D8PSK and a number of square QAM modulations up to > M=256. > These are currently disabled until the receivers are finished, but the > code > will be there to see how I'm doing it. The modulators have been verified > using our signal analyzer. > > Tom > ==== > > > Best wishes, > > Alan > -- View this message in context: http://old.nabble.com/How-to-implement-64QAM--tp27396489p27400007.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio