Hi Boris I think you need to specify costas-alpha as 0.05 and gain-mu as 0.001 as your starting point. Hope this would help.
Bill --- On Tue, 5/12/09, Eric Blossom <e...@comsec.com> wrote: From: Eric Blossom <e...@comsec.com> Subject: Re: [Discuss-gnuradio] Benchmark-rx/tx.py with QPSK modulation To: "Boris Danev" <boris.da...@inf.ethz.ch> Cc: discuss-gnuradio@gnu.org Date: Tuesday, May 12, 2009, 5:34 PM On Tue, May 12, 2009 at 03:02:20PM +0200, Boris Danev wrote: > Hi everyone, > > I want to ask if someone has tried the benchmark-rx.py/bencmark-tx.py > (gnuradio-examples/python/digital) in the the 3.1.3 realease with qpsk > modulation (-m dqpsk) for transfering user data? I connected 2 usrps > with an RF cable and two laptops (gnuradio 3.1.3 release). > Using gmsk and dbpsk modulation seem to work more or less, even though > the receiver sometimes misses sent packets. However the dqpsk modulation > did not work at all. I am always getting garbage in the payload and ok = > false for the received packets if any. Also, many sent packets were not > received at all. > > Any comments or suggestions will be appreciated. Thank you in advance. > > Boris We've fixed some bugs in the mpsk demod since 3.1.3. You could either try the trunk, or stay tuned for a few more days when we expect to have the 3.2.0 release out. Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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