Sunday, 31 March 2019

AM and Suppressed carrier SSB


So if I have AM, then to transmit information, I modulate the amplitude of energy peaks in a wave that has a frequency of say 10 kHz.


So normally, the individual peaks in the wave occurring at regular interals would be say 1 Volt high. But by changing the height of the peaks to half volt quarter volt and every thing in between, and having someone tune in to the right frequency, they can hear my voice, because I am now changing their speaker energy output by changing the peaks in my carrier wave.


So SSB says, you can just change the troughs depths instead, or just the peaks height or whichever, it's all the same.


But then suppressed carrier SSB. how can you suppress the carrier?. What are you modulating or changing the peaks of then? And how does the receiver separate your signal from other random noise, without a carrier to check for modulations on?




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