![]() Prior to discussing further the different types of modulation techniques, let us understand the importance of modulation. These modulation techniques are classified into two major types: analog and digital or pulse modulation. Usually, a high-frequency sine wave is used as a carrier wave signal. ![]() ![]() This carrier wave can be DC or AC or pulse chain depending on the application used. In this process video, voice and other data signals modify high-frequency signals – also known as the carrier wave. Modulation is a process of changing the characteristics of the wave to be transmitted by superimposing the message signal on the high-frequency signal.
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