Other Definitions
quadrature (dict)
Quadrature
Quadrature
, derived from
Latin
quadrare
, is a term with various meanings:
in
astronomy
, the
line
tangent
to an object's
orbit
defines the object's
quadrature
. For a circular orbit, this line is 90°, or a quarter of a circle, away from the center of the orbit.
in
geometry
,
quadrature of the circle
or
squaring the circle
is the problem of
constructing
a
square
and
circle
of equal area, impossible using only an unmarked
straightedge
and
compass
in
mathematics
,
quadrature
is a
synonym
for
numerical integration
in
telecommunications
,
quadrature
refers to
signals
which are separated in
phase
by 90° (π/2
radians
)
Quadrature amplitude modulation
(QAM) is the encoding of
information
into a
carrier wave
by variation of the
amplitude
of both the carrier wave and a 'quadrature' carrier that is 90
out of phase
with the main carrier in accordance with two input signals.
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