6 DEFINE AMPLITUDE MODULATION, FREQUENCY MODULATION ,PHASE MODULATION

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MODULATION :     

THE PROCESS OF CHANGING SOME CHARACTERISTICS OF CARRIER SIGNAL (AMPLITUDE  / FREQUENCY / PHASE)  IN ACCORDANCE WITH THE INSTANTANEOUS AMPLITUDE OF THE MESSAGE SIGNAL IS KNOWN AS MODULATION.


AMPLITUDE MODULATION :-

THE PROCESS OF CHANGING AMPLITUDE OF CARRIER SIGNAL IN ACCORDANCE WITH THE INSTANTANEOUS AMPLITUDE OF THE MESSAGE SIGNAL IS KNOWN AS AMPLITUDE MODULATION.


FREQUENCY MODULATION :-

THE PROCESS OF CHANGING FREQUENCY OF CARRIER SIGNAL IN ACCORDANCE WITH THE INSTANTANEOUS AMPLITUDE OF THE MESSAGE SIGNAL IS KNOWN AS FREQUENCY MODULATION.


PHASE MODULATION :-

THE PROCESS OF CHANGING PHASE OF CARRIER SIGNAL IN ACCORDANCE WITH THE INSTANTANEOUS AMPLITUDE OF THE MESSAGE SIGNAL IS KNOWN AS PHASE MODULATION.





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