Lester,
The "inventor" has shown over and over that he is not to be trusted, and
so his block diagram would not be believed either. I suggested months
ago to him to just send his code in confidence to the FCC, which they
would keep private, and be done with it. He replied that, arrogantly,
"The FCC would have to purchase the code from him". To me, that suggests
that he is unwilling to disclose the code because it would prove once
and for all that it was spread spectrum, and instead, he tried to bluff
his way to approval, even by changing his original description of the
code as spread spectrum, which obviously did not work.
ROS's best advantage, IMHO, is for EME, and it is legal there for US
hams for 432 and 1296 EME. I only wish it were legal on 2M also and I
could use it for EME on that band.
Yes, it should be open-source, and that would end the discussion, but he
has (for perhaps devious or commercial) personal reasons for refusing to
do so.
That is just not going to happen, so let's end the discussion on that
note and get on the air instead!
73, Skip KH6TY
On 7/12/2010 1:14 PM, Lester Veenstra wrote:
Skip:
Spectral analysis cannot differentiate between a high rate FEC
operating after, as it invariably must, a randomizer, and a true
spread spectrum system. And a spread spectrum system does not need to
employ frequency hopping. And a signal that "frequency hops" is not
necessarily a spread spectrum signal. I refer you to the old
favorite of the UK Diplomatic service, the Piccolo.
As I advocated in an earlier post, the way to end this endless
discussion would be for the "inventor" to disclose the block diagram
of the various steps in his encoding/modulation system. In fact I was
rash enough to suggest that IMHO, all of these systems being played
with by hams, should be open sourced, so that, the end user can have
some confidence in what he is using, and the state of the art can be
mutually advanced. We started with this philosophy with the TTL
MAINLINER-II, and continue it today with many of the DSPR systems out
there, including the primary commercial company. Their disclosure
does not seem to have slowed them down at all.
Thanks 73
Les
