define modulation.write its type.
Answers
Modulation is a process of mixing a signal with a sinusoid to produce a new signal. This new signal, conceivably, will have certain benefits over an un-modulated signal. Mixing of low frequency signal with high frequency carrier signal is called modulation.
There are 3 basic types of modulation: Amplitude modulation, Frequency modulation, and Phase modulation.
amplitude modulation
a type of modulation where the amplitude of the carrier signal is modulated (changed) in proportion to the message signal while the frequency and phase are kept constant.
frequency modulation.
a type of modulation where the frequency of the carrier signal is modulated (changed) in proportion to the message signal while the amplitude and phase are kept constant.
phase modulation.
a type of modulation where the phase of the carrier signal is varied accordance to the low frequency of the message signal is known as phase modulation.
Explanation:
There are 3 basic types of modulation: Amplitude modulation, Frequency modulation, and Phase modulation. a type of modulation where the amplitude of the carrier signal is modulated (changed) in proportion to the message signal while the frequency and phase are kept constant.