I'll leave the solution to those much more knowledgeable than I am, but
my simplistic guess is perhaps ROS does not have the degree of
redundancy that Olivia has, and when enough tones are distorted, the
data is lost. I think the main point is that Olivia outperforms ROS in
less than half the b
Yes but at UHF there seems to not be enough spread to tolerate the
Doppler shift. If the frequencies were further apart, and were received
through a wider window, the Doppler would be tolerated better but at
what penalty in noise? I can think of a few ways to solve your problem
but not with
Based on observations of the tones on the waterfall on the air, compared
to observing them locally, and hearing the raucous tones compared to
bell-like quality locally, my guess is that perhaps the modulation is
disturbed or the tones moved in frequency far enough so there is no
decoding. If we
If there were documentation on ROS then there would the possibility of
investigating the problem further and maybe adding improvements. Part of
the problem is that even if there is a large degree of spreading
compared to the data rate, the channel is still quite narrow and a large
portion of i
> Simon HB9DRV wrote: There's a lot more to Olivia than being
multi-tone MFSK.
I am aware of that, Simon.
However, Olivia is currently the most popular digital mode other than
PSK31 and RTTY, and the question was if ROS 16 baud was worth using
twice the bandwidth of Olivia. We hoped that
There's a lot more to Olivia than being multi-tone MFSK.
A fairer comparison with a new mode such as ROS would be MFSK as the
features of Olivia that make it so very robust could (should) be added at a
later date.
To put it simply Olivia hunts for the best signal it can decode and has
error