"J. Mc Laughlin" wrote in message
.. .
2. The paper by Costas in December 1959 Proc of IRE is also valuable to
this discussion. Be sure to read the follow-up comments.

Is that available publicly anywhere?

3. I heard with my own ears Shannon observe that, from an engineering point
of view, if one did not have an occasional transmission error one was using
a wasteful amount of power. Shannon was a Michigan boy. 60 dB SNR??? Not
in fly-over land.

I think the counterpoint is that, particularly in mobile environments, you
often needed huge fade margins, e.g., 20-40dB wasn't uncommon for pager
systems. Hence in systems designed to have, say, an "average" of 30dB SNR
(same audio quality as the telephone system, assuming 3kHz bandwidth as well),
it wouldn't be surprising to occasionally find you're actually getting 60dB
SNR in the most ideal scenario.

Although perhaps designing for an average of 30dB SNR is a little high for a
paging system... anyone know? (I'm thinking 20dB might be a bit more
realistic.)

---Joel