AM electromagnetic waves: 20 KHz modulationfrequencyonanastronomically-low carrier frequency
isw wrote:
What is the difference between AM and DSB?
AM is a process. DSB (double sideband), with carrier, is it's most
simple
result. DSB without carrier (suppressed carrier dsb) requires using, at
least, a balanced mixer as the AM multiplier.
And requires, for proper reception, that a carrier be recreated at the
receiver which has not only the amplitude of the original, but also its
exact phase. Absent some sort of "pilot" to get things synchronized,
this makes reception very difficult.
Isaac
Try a Costas loop.
|