Modulation is the process of superimposing the information contents of a modulating signal on a carrier signal (which is of high frequency) by varying the characteristics of carrier signal according to the modulating signal.
Modulation is a process in which the base band signal modifies another high-frequency signal called the carrier.
Types of Modulation
We can modulate the information-bearing signal into two types namely.These
are called Modulation Techniques.
1. Analog Modulation
2. Digital Modulation
Analog modulation is the process of converting an analog input signal into a
signal that is suitable for RF transmission.
Digital modulation is the process of converting a digital bistream into an analog signal suitable for RF transmission.