<s>
Double-sideband	B-Device
suppressed-carrier	I-Device
transmission	I-Device
(	O
DSB-SC	B-Device
)	O
is	O
transmission	O
in	O
which	O
frequencies	O
produced	O
by	O
amplitude	B-Device
modulation	I-Device
(	O
AM	O
)	O
are	O
symmetrically	O
spaced	O
above	O
and	O
below	O
the	O
carrier	O
frequency	O
and	O
the	O
carrier	O
level	O
is	O
reduced	O
to	O
the	O
lowest	O
practical	O
level	O
,	O
ideally	O
being	O
completely	O
suppressed	O
.	O
</s>
<s>
In	O
the	O
DSB-SC	B-Device
modulation	O
,	O
unlike	O
in	O
AM	O
,	O
the	O
wave	O
carrier	O
is	O
not	O
transmitted	O
;	O
thus	O
,	O
much	O
of	O
the	O
power	O
is	O
distributed	O
between	O
the	O
side	O
bands	O
,	O
which	O
implies	O
an	O
increase	O
of	O
the	O
cover	O
in	O
DSB-SC	B-Device
,	O
compared	O
to	O
AM	O
,	O
for	O
the	O
same	O
power	O
use	O
.	O
</s>
<s>
DSB-SC	B-Device
transmission	O
is	O
a	O
special	O
case	O
of	O
double-sideband	B-Device
reduced	I-Device
carrier	I-Device
transmission	I-Device
.	O
</s>
<s>
DSB-SC	B-Device
is	O
basically	O
an	O
amplitude	B-Device
modulation	I-Device
wave	O
without	O
the	O
carrier	O
,	O
therefore	O
reducing	O
power	O
waste	O
,	O
giving	O
it	O
a	O
50%	O
efficiency	O
.	O
</s>
<s>
Spectrum	O
plot	O
of	O
a	O
DSB-SC	B-Device
signal	O
:	O
</s>
<s>
DSB-SC	B-Device
is	O
generated	O
by	O
a	O
mixer	O
.	O
</s>
<s>
For	O
DSBSC	B-Device
,	O
Coherent	O
Demodulation	O
is	O
done	O
by	O
multiplying	O
the	O
DSB-SC	B-Device
signal	O
with	O
the	O
carrier	O
signal	O
(	O
with	O
the	O
same	O
phase	O
as	O
in	O
the	O
modulation	O
process	O
)	O
just	O
like	O
the	O
modulation	O
process	O
.	O
</s>
