Transmission: impossible

Nov 14, 2005 5 Replies

I'm not that impressed.

An 850 ft tower puts the antenna more than high enough for it to be a line-of-sight connection at 18 miles. 50 mW at 18 miles gives about -104 dBm of signal with 0 dB antenna gains in free space. It is probably more like -101 dBm since the signal is not radiated spherically. Adding in a little antenna gain could make the signal about 95 dBm. I have a $5 ISM band regenerative receiver with a specified sensitivity of -103 dBm. It won't do 3.7 Mbits/sec, however.

It sounds like it might be good technology, but not a miracle.

Cheers, John

Sounds like true "broadband", from my reading of the not-too-technical article there isn't even a low-Q tuned tank circuit around anywhere. The transmitter just throws out an apparently arbitrary waveform into the ether. The other interpretation is discontinuous phase FSK but that wouldn't give you any advantages (just lots of clicking) would it?

If they can receive this with a "50-cent receiver" as they claim then they're doing something at least moderately clever! A GHz A/D does not come that cheap (or does it?) I don't even know from the article what band they're using, if this can be done at LF/VLF (maybe it can) then it would meet that price point.

Tim.


> Fred Bloggs wrote:


> >> W> >>>>
> >>>> Remember the following definition:
> >>>> A conservative puts his money where his mouth is.
> >>>> A liberal puts YOUR money where his mouth is.
> >>>
> >>> Bush is putting OUR money in Iraq, not his money.
> >>
> >> Nah- he's putting your grandchildrens' money into Iraq- not ours.
> >
> > Without putting *someone's* money in there your grandchildren
> > (the thought staggers...) mey not be.
>
> That's where we disagree.

That's just about the kindest thing you've said in weeks.


> It's Congress that decides to raid the cookie jar rather than
> > cut bridges to nowhere.
>
> Indeed. The Republican Congress has been both raiding the cookie
> jar, so our national debt rises dramatically each year (

What makes you think I'm happy about Congress? There are a bunch of liberal Republicans I'd like to see drawn and quartered along with your heroes Teddy and John.


whereas it
> fell year after year under Clinton, but we'll ignore that), *and*
> they've been funding bridges to nowhere, as in the famous case of
> the Alaskan bridge, but you'll ignore that...

It fell year after year because the dot-bombs were pumping trmendous money into the government, though Newt's crew tried to hold back spending it didn't happen. Clinton had nothing to do with it (and everything to do with the mess we're in in the ME).

Keith

bollocks more like.

Bet the analysts like it though...

I don't believe it. Sounds like a crock of sh*t.

"What is now proved was once only imagin\'d" - William Blake

Yep, not a very good stage show, I tried to read through the patent, but I fell asleep, they do that to me, the journo's didnt ask the right questions, shame.

I'll put the link into the "pending dept", see what happens in a year.

It'll be nice if it works

martin

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