Hamish Moffatt wrote:
>
> On Sun, Nov 21, 1999 at 12:04:55PM -0500, Greg Maxwell wrote:
> > Another way to look at this is that you have a maximum symbol rate of
> > 44100/s.
>
> 22050/s, I believe.
This is something I'm not quite clear on. I thought that a 'symbol' in
this context would be a single mesurable object. I.e. the voltage of the
signal at a single point in time. If thats the case then the nyquest
frequency isn't involved at all. Am I wrong here? It's been a while
since I've studied signal, and information theory...
> > With normal QAM64 (I think the linmodem code implimentes this) you pack
> > 6bits/symbol, giving a raw datadate of 33075bits/s.
> >
> > So I don't think the rate is the limiting factor. :)
>
> Well, it does mean you can't scale infinitely.
True. But it should be possible to do MUCH more then 9600.. :)
I imagine that we could manage to use a higher order QAM if we shoved in
enough forward error correction. :)
Does anyone here know of a site showing S/N ratios for various radio
bands?
