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Significance of modulation in communication.

Modulation is the process in which amplitude frequency phase of carrier signal is varied with respect to instantaneous amplitude of the modulating signal.

Need of modulation:

1] Reduction in the height of antenna.

2] Avid mixing of signals.

3] Increases the range of communication.

4] Allows multiplexing of the signals.

5] Improves quality of reception.

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