Answer Posted / swati birare

Technically, Modulation is a process whr the amplitude/frequency/phase of the high freq carrier signal is varied in accordance with the instantaneous amplitude of the low frequency baseband signal(original information)is. The baseband signal is transmitted using the high freq carrier so tht:

# Anntena hieght get reduces
# Avoids mixing of signal
# Increases commntn range
# Multiplexing possible

*For more details, refer Analog Communication by J.S.Katre

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