I've been working on an independent implementation of the FDMDV modem as
a personal exercise. As I understood the description*, the central BPSK
subcarrier should be at a symbol rate of 50 per second, but looking at
the tone spacing it's too narrow: but a 25 symbols per second seems to
line up. Am
t)*cos(2*pi*t*Rs/2)
> = 0.5*cos(2*pi*t(fcentre+Rs/2) + 0.5*cos(2*pi*t(fcentre-Rs/2)
>
> which should look like two sine waves Rs apart
>
> On 18/08/16 00:00, Phil Frost wrote:
> > I've been working on an independent implementation of the FDMDV modem as
> > a person
I've heard there's a 700C mode being developed. I can't promise to be
useful, but I'd like to help. I can't find much information on it though,
besides a blog post[1] that mentions it indirectly. Is there some code I
should check out?
And more generally, what kind of help would be most useful? Amp
On 09/20/2016 12:39 AM, David Rowe wrote:
> General C-style programming skills required with a willingness to learn
> how to at least read Octave. I'll give you plenty of help.
>
> Just contact me off list if you are interested.
I can probably handle that. Where should I start?
---
Wouldn't the ISI largely (theoretically, completely) be ameliorated by
trellis decoding? And I'm not talking about FEC, but rather incorporating
the ISI into the expected Cartesian coordinates for each symbol.
I did some experimentation with this technique on BPSK31, and I was able to
get a little
