On Sun, Mar 2, 2014 at 4:50 PM, David Rowe <[email protected]> wrote:
>
> Key question here is - how would you test any changes?
It would not be too difficult, but I was thinking of attacking the band
edges. You could do this with another user moving into your edge, and
another user noting at which Hz the current version fails, or the modified
version fails, and which one fails first.
My gut feeling tells me that spreading the voice bits out and moving them
and the FEC bits closer to the pilot, would protect them more from
interference. Prevent the 4-bit error by not pairing like bits. For
example, don't pair V!-V2, but instead pair V1-P1, etc.
Suppose in 2025 everyone uses DV, and the bands are crowded with activity.
How close can each DV Ham get to the next DV ham?
I like the simplicity of this modem, and was wondering if just a simple few
tweaks could improve things. In my experience with the AOR modem, the guys
who wanted the data signals off their voice bands just slid-up to the edge
and you were history. Can't even get a pink-slip for that :-)
Steve
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