Re: [Discuss-gnuradio] AGC loop and digital mods

['Eric Blossom']

On Mon, Sep 25, 2006 at 11:35:33PM -0400, Tom Rondeau wrote:
> Eric,
> 
> Here's a brief write-up on the tests I ran for the AGC loops. It looks like
> the feedforward has a slight advantage over most of the test cases. 
> 
> I thought I'd email this to the listserv in case anyone is interested in the
> digital modulations. Basically, we're working on getting stable DBPSK and
> DQPSK modulators into the code base. The AGC loops seems to be producing
> problems, much of which is caused by driving the Costas loop crazy at the
> next stage of the receiver. Future work will include creating a non-coherent
> receiver for the differential modulations to take out the Costas loop.
> 
> Tom

Hi Tom,  thanks for making the measurements and writing them up.

I'll be merging the results of all this work into the trunk tomorrow.
Thanks to Tom for all the effort he's put into sorting out the DBPSK
and DQPSK.  And thanks to Matt for suggesting the feed forward AGC.

Eric