AMPLITUDE MODULATION Meaning and
Definition
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Amplitude modulation (AM) refers to a method of transmitting signals over a carrier wave, where the amplitude of the carrier wave varies in accordance with the instantaneous amplitude of the modulating signal. It is a process of modulation used primarily in analog communication systems.
In AM, the modulating signal is usually an audio signal, such as voice or music, and it is mixed or superimposed onto a higher-frequency carrier wave for transmission. The amplitude variations of the carrier wave correspond to the variations in the modulating signal, reproducing the original signal at the receiving end.
The key component in an AM system is the modulator, which combines the carrier wave and the modulating signal. Here, the modulating signal acts as a control parameter, influencing the amplitude of the carrier wave. At the receiver, the demodulator separates the modulating signal from the received AM waveform.
One advantage of AM is its simplicity and compatibility with existing receiver technology. However, it is also susceptible to various forms of interference and noise, impacting signal quality and range.
AM finds applications in radio broadcasting, particularly for long-distance transmission of audio signals. It is also used in certain telecommunication systems, like two-way radios or walkie-talkies. Additionally, AM is still used in specific situations, such as in air traffic control communications or amateur radio.
Common Misspellings for AMPLITUDE MODULATION
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Etymology of AMPLITUDE MODULATION
The word "amplitude" derives from the Latin word "amplitudo", which means "bigness, extent, greatness". It comes from the verb "ampliare", meaning "to enlarge". "Modulation" originates from the Latin word "modulatio", which comes from the verb "modulare", meaning "to measure, regulate, or sing". Both words have been used in various contexts throughout history. In the specific case of "amplitude modulation", the term refers to the modulation technique that changes the amplitude of a carrier signal in order to transmit information.
Similar spelling word for AMPLITUDE MODULATION
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