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Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

From: Bill Stevenson
Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio
Date: Wed, 26 Nov 2008 15:39:42 -0800 (PST)

From: Johnathan Corgan <address@hidden>
To: Bill Stevenson <address@hidden>
Cc: address@hidden
Sent: Wednesday, November 26, 2008 9:28:05 AM
Subject: Re: [Discuss-gnuradio] a report on dqpsk modulation in gnuradio

On Tue, Nov 25, 2008 at 8:46 PM, Bill Stevenson
<address@hidden> wrote:

> Thank you, Johnathan. Anyway, I would like to use svn and download the fixed
> code from the trunk software! Do I just need to type in the command:
> $ svn co http://gnuradio.org/svn/gnuradio/trunk gnuradio
> in the terminal?


> But, is there anything else I should do after downloading the code?

Please read: http://gnuradio.org/trac/wiki/BuildGuide

> One more question I forgot is what kind of risk that might happen to me
> after I updated the trunk code? Thank you!

The trunk release of software changes frequently, and doesn't always
maintain backwards compatibility with existing code.  At this point,
releases 3.1.x are getting old, and the trunk has many more features.
Since we are nearing release 3.2, however, there won't be much more


Hello, Johnathan. I have implemented the entire codes in the trunk step by step, but unfortunately this time I cannot receive any correct packets under the dqpsk modulation scheme even after I set the packet size to 40. Actually, before I installed the SVN codes, I was able to get 90% correct packets when I set the packet size to 40 and samples per symbol to 4, but this time it failed sadly. Is there anything going wrong in your new carrier offset tracking tactics? Thank you!


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