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Complexity of the receiver.

SSBSC says it all: Single Side-Band, Suppressed Carrier

The spectrum of an AM signal includes two (mirror) sidebands, on either side of the carrier (the nominal AM frequency on the dial). By suppressing a sideband and the carrier, the transmitter can spare the energy that would otherwise go into those signal components, which can represent two-thirds of the total energy in a standard AM signal.

This comes at a cost of higher complexity in the receiver, since it needs to recreate the missing parts of the signal before it can demodulate it. And since there is no carrier frequency, a superetherodyne receiver (that can lock on to the carrier, like all modern AM receivers) will not work; other strategies must be used to compensate carrier drift.

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16y ago

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