| amplitude modulation n. Abbr. AM 1. The encoding of a carrier wave by variation of its amplitude in accordance with an input signal. 2. A broadcast system that uses amplitude modulation. |
amplitude modulation
n
1. (Electronics & Computer Science / Telecommunications) one of the principal methods of transmitting audio, visual, or other types of information using radio waves, the relevant signal being superimposed onto a radio-frequency carrier wave. The frequency of the carrier wave remains unchanged but its amplitude is varied in accordance with the amplitude of the input signal Abbreviations AM am Compare frequency modulation
2. (Electronics & Computer Science / Telecommunications) a wave that has undergone this process
| amplitude modulation A method of transmitting signals, such as sound or digital information, in which the value of the signal is given by the amplitude of a high frequency carrier wave. In AM radio transmission, for example, the signal to be carried is a sound wave, and its increasing and decreasing value is reflected in the increasing and decreasing amplitude of the radio frequency carrier wave. In fiber optics, the carrier wave is a beam of light. Compare frequency modulation. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  amplitude modulation - modulation of the amplitude of the (radio) carrier wavemodulation - (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase |
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