In
telecommunication,
linearity is the property of a
system in which, if
input signals
X and
Y result in system
output S (
X ) and
S (
Y ) respectively, the input
signal aX +
bY will result in the output
aS (
X ) +
bS (
Y ), where
S is the system
transfer function and
a and
b are scalars.
Source: from Federal Standard 1037C
See also: linear