From: swc@uc1.ucsu.edu (Stuart W. Card)
Date: Tue, 12 Oct 93 19:26:55 PDT
To: mg5n+@andrew.cmu.edu
Subject: Re: Secret network
Message-ID: <9310130226.AA14844@uc1.ucsu.edu>
MIME-Version: 1.0
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Alas, water pipes are much better for

1) noise and unintentional transmissions (which can be quite garbled
and no one cares), and

2) low frequency transmissions (which can carry only low bandwidth
communications).

Trying to transmit meaningful communications at high data rates
over water pipes would be a TREMENDOUS technical challenge,
requiring a vast amount of signal processing to compensate
for multipath reflections, impedance mismatches, thermal noise,
pickup of an almost variety of interference soures  ces,                                infinite variety of interference sources. ,
nonstationary channel characteristics, intermittent grounds,
etc etc ad infinitum (or at least ad nauseam).  Sorry about
the cold water, I have seriously considered this scheme and
believe that it can be used only for very short haul, very low
bandwidth communications (say intra-building at 300 baud).  ,
although that's a guess not a simulation result).
------------------------------------------------------------------------
Stuart W. Card, Consultant, Card & Associates -- Research & Development
Box 153 RR 1 Newport Rd Utica NY 13502         315-735-1717 / FAX -8469
swc@uc1.ucsu.edu or cards@top.cis.syr.edu           "Who is John Galt?"