Dave Oldridge wrote:
John Smith I wrote in news:fa4i2a$jve$1
@news.albasani.net:

Dave Oldridge wrote:

...
You need a good book on digital error correction algorithms in digital
communications.

Unless you have constructed a real rf jammer (white noise really), BPL
will eat up any legitimate amateur communications you can throw at it
... however, rumors do prevail, like the one about the tin foil hat.

So how is it gonna eat up having its receiver saturated? I'm pretty
familiar with digital comms and, with the exception of some pretty slow
speed stuff designed for weak signal work, most of it is not very good
unless you have a really solid signal-to-noise ratio. I'm just saying
that if it's getting out to my antenna that loud, then my kilowatt is
gonna have a fair chance at saturating the thing's receiver. And the
more noise they make, the more I'm apt to have to use the kilowatt to
shout over them.

Of course in our current enforcement situation here, I'd probably simply
be told to stand down and have to go to great legal lengths to appeal the
ruling.


Digital is not analog, when adverse conditions have made an analog
signal totally unusable, a digital signal, most likely, may still be
achieving 100% error free data transfer--it is just the nature of the beast.

The "intelligence" of the software controlling the data transmission(s)
is the single most important factor--as logic would dictate. Even under
almost total saturation (it would be virtually impossible for 100%
saturation, baring hooking the kw+ rig directly to the power lines) of
the BPL signal some type of heterodyne would be occurring with the KW
signal. Since digital is simply detecting an ON/OFF signal, in
conjunction with spacing/length of these, an on/off signal is still
detectable in this heterodyne--given the software is aware and capable
of reading this signal and switching "modes" to do so, no harm is done
to the data ... and without doubt, new error correction methods will
also develop as BPL grows and hf-rf-terrorist-hams challenge this system
.... LOL!

Digital is magnitudes more robust than analog, again owing to the very
nature of the beast and the simplicity of the on/off, pulse width,
timing nature of the signal.

Regards,
JS