
28-1
28.1 Introduction
e use of wireless communications in industrial environments poses a dierent set of challenges than
deployment
in
home
and
enterprise
environments.
Signicant
amounts
of
electrical
noise
such
as
vari-
able
frequency
drives,
competing
radio
systems,
radar
and
microwave
sources,
and
welders
are
pro-
duced
in ind
ustrial
env
ironments.
Sig
nal
att
enuation
and re
ects
are alw
ays
pre
sent
[1]
.
e
placement
of
wireless
access
points
(APs),
or
radio
nodes,
and
adjustment
of
transmitter
power
to
match
receiver
sensitivities
is
more
crucial
in
industrial
settings
where
the
reliability
of
the
overall
system
can
aect
plant
safety
and