How It Works
This is best shown graphically. Below, is a message signal that one may wish to modulate onto a carrier, consisting of a couple of sinusoidal components.
The equation for this message signal is .
The carrier, in this case, is a plain 5 kHz sinusoid—pictured below.
The modulation is performed by multiplication in the time domain, which yields a 5 kHz carrier signal, whose amplitude varies in the same manner as the message signal.
The name "suppressed carrier" comes about because the carrier signal component is suppressed—it does not appear in the output signal. This is apparent when the spectrum of the output signal is viewed:
Read more about this topic: Double-sideband Suppressed-carrier Transmission
Famous quotes containing the word works:
“‘Tis too plain that with the material power the moral progress has not kept pace. It appears that we have not made a judicious investment. Works and days were offered us, and we took works.”
—Ralph Waldo Emerson (1803–1882)