[IP] CURTAINS FOR "JITTERS"?
Begin forwarded message:
From: Dewayne Hendricks <dewayne@xxxxxxxxxxxxx>
Date: November 10, 2005 12:26:10 AM EST
To: Dewayne-Net Technology List <dewayne-net@xxxxxxxxxxxxx>
Subject: [Dewayne-Net] CURTAINS FOR "JITTERS"?
Reply-To: dewayne@xxxxxxxxxxxxx
CURTAINS FOR "JITTERS"?
<http://www.defensetech.org/archives/001929.html>
The idea was simple: take the military's tangled mess of radios, any
replace 'em all with a single, software-based model.
But executing the idea has been anything but easy. And now, generals
are talking about dropping the notion of a universal radio
altogether, Defense News' Greg Grant reports -- right when Pentagon
chiefs are trying to decide what to do with about the troubled, $6.8
billion Joint Tactical Radio System.
Essentially, the JTRS program [known as "Jitters"] is aiming for
something that’s almost physically impossible, or at least extremely
expensive, experts say... The desire to use a single antenna for many
different wavelengths bumps up against laws of physics, which make it
difficult to pull in strong signals across the spectrum. An amplifier
that works across the whole spectrum will use much more electrical
power than one tuned for a specific frequency band. Waveforms and
transmissions that are speedily handled by analog systems, such as
the widely used Link-16, are much tougher to achieve with digital
computation...
[snip]
Weblog at: <http://weblog.warpspeed.com>
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