Modulation is the process of adding information to a carrier signal to convert data into radio waves or electrical/digital signals for transmission over a medium. The carrier signal is a steady waveform with a constant height or amplitude and frequency. Modulation can be applied to electromagnetic signals such as radio waves, lasers/optics, and computer networks. There are three basic properties of a signal: amplitude, phase, and frequency. Modulation works by changing one of these properties of the carrier signal according to the baseband signal. The three types of modulation are amplitude modulation, frequency modulation, and phase modulation.
Modulation is used in communication to transmit multiple channels of information through a single communication medium using frequency-division multiplexing (FDM) . It also plays a major role in the fast transmission of signals. By using a carrier wave of high frequencies and allotting a band of frequencies to each message, there is no mixing up of signals, and the received signals are clear. The modulation process also helps to increase the strength of the signal for maximum reach.
In summary, modulation is the process of adding information to a carrier signal to convert data into radio waves or electrical/digital signals for transmission over a medium. It is used in communication to transmit multiple channels of information through a single communication medium and to increase the strength of the signal for maximum reach.
