Thank you Bill and Eric.
With the change of the suggested 2 parameters dbpsk and gmsk reception
appears to be stable.
The dqpsk is still not working properly.
I will try the trunk as well. The 3.2 release seems very close :-).
Regards,
Boris
Bill Stevenson wrote:
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
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--
Boris Danev
System Security Group, ETH Zurich
IFW C 41.1, 8092 Zurich, Switzeland
E-Mail: boris.da...@inf.ethz.ch
Phone: +41 44 632 7669
Fax: +41 44 632 1172
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