Define the term modulation. Name three different types of modulation used for a message signal using a sinusoidal continuous carrier wave. Explain the meaning of any one of these.
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any characters can be changed in message signal with respect to carrier signal
1.frequency modulation
2.phase modulation
3.angle modulation
in frequency modulation,frequency of message signal can be changed.
1.frequency modulation
2.phase modulation
3.angle modulation
in frequency modulation,frequency of message signal can be changed.
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Modulation:
The modulation is the process of varying the carrier wave (transmitting wave) with the modulating wave (information wave). The modulation is done to transmit the signal for longer distance. The device used to vary the information is called modulator.
Types of modulation:
- Amplitude modulation
- Frequency modulation
- Phase modulation
- Polarization modulation
- Pulse-code modulation
- Quadrature amplitude modulation
The meaning of Amplitude modulation:
In this modulation, the amplitude or intensity or height of the wave is varied to transfer the data.
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