Re: [Discuss-gnuradio] M&M impl, its parameters, and why does itwork for GMSK?

[Bob McGwier]

Long, Jeffrey P. wrote:
> While we are on the topic of clock recovery and someone more
> knowledgeable than me is reading :) I would like to pose a question to
> Bob. How might one do clock recovery on a M-ary CPM signal? It sounds
> like a ML sequence technique might be an option but is there a simpler
> ad-hoc technique that works as well? My "superiors" tell me to just do
> clock recovery on a 2-ary modulated preamble and then hold it for the
> rest of the packet when it switches to your M-ary mode. I suppose this
> would work but I think it might be a little too much work in GNU right
> now until the meta data extra channel thing is ready, right? For
> simplicity I would prefer a technique that could run on streaming data
> like the M&M.
>
> thanks
> Jeff
>
>   

Also, let me be judgmental for a moment.  I consider it extremely poor 
design practice to assume stationary channels, even for short duration 
signals if you can afford  to do the tracking  algorithms.

Bob

--
AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL,
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