Re: huawei

[Warren Bailey <wbailey () satelliteintelligencegroup com>]

It is if you're trying to figure out something far away, smoke signals
come to mind (seriously).

Any amount of noise seen (aside from AWGN, obviously) in the world is not
a big deal. We have pretty neat ways to clean up noise in bandwidth
channels. ;)

http://www.comtechefdata.com/technologies/doubletalk is one of the plays
we roll out all the time.

Applied Signal (father of ninja magic mentioned above) had offices in
Crypto City, but were eaten by Raytheon a while back and I'm unsure if
they're still around. Food for thought, but really - don't sweat the noise.

On 6/14/13 5:34 PM, "Scott Helms" <khelms () zcorum com> wrote:

> Is it possible?  Yes, but it's not feasible because the data rate would be
> too low.  That's what I'm trying to get across.  There are lots things
> that
> can be done but many of those are not useful.
>
> I could encode communications in fireworks displays, but that's not
> effective for any sort of communication system.
> On Jun 14, 2013 8:13 PM, "Jimmy Hess" <mysidia () gmail com> wrote:
>
> > On 6/14/13, Scott Helms <khelms () zcorum com> wrote:
> > > Really? In a completely controlled network then yes, but not in a
> > > production system.  There is far too much random noise and actual
> > latency
> > > for that to be feasible.
> >
> > I think you might be applying an oversimplified assumption the
> > situation.   Noise limits the capacity of a channel,  and increases
> > the number of gyrations required to encode a bit, so that it can be
> > received without error.
> >
> > The degree of 'random noise',  'actual latency variation',  and
> > 'natural packet ordering'  can be estimated, to identify the noise.
> >
> > Even with noise, you can figure out,  that the  average value which
> > the errors were centered around increased by  5ms or 10ms,  when a
> > sequence of packets with certain sizes,  certain checksum values,  and
> > certain  ephemeral ports  were   processed in a certain sequence,
> > after a sufficient number of repetitions.
> >
> > --
> > -JH