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Distinguish between amplitude modulation and frequency modulation​

Answer»

Amplitude and frequency modulation are the two techniques used to modulate a signal in order to have LONG distance as well as PROPER transmission. The MAJOR DIFFERENCE between amplitude modulation and frequency modulation lies in the method of modulating the signal. In amplitude modulation, variation in amplitude of CARRIER signal according to the message signal is noticed. However, in frequency modulation, the frequency of the carrier signal is changed according to the message signal.

In amplitude modulation, simply the amplitude of the carrier is modulated thus its frequency and phase shows no change. Whereas, in frequency modulation, only the frequency of the carrier is modulated hence here amplitude and phase act as constant factors.



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