Belrose, John S. Department of Communications, Communication Research Centre, Ottawa, Ontario, Canada.
Layer, David H. National Association of Broadcasters, Washington, DC.
Denny, Robert W., Jr. Denny & Associates, Oxon Hill, Maryland.
Last reviewed:January 2020
- FM broadcasting
- FM mobile transmission
- Radio relaying
- Video recording
- Related Primary Literature
- Additional Reading
Radio transmission accomplished by variation of the frequency aspect of a radio-frequency (RF) carrier signal by an input signal (called the modulating signal). The frequency-modulation (FM) technique was invented by Major Edwin A. Armstrong in the 1930s. FM radio broadcasting offers a number of advantages over amplitude-modulation (AM) radio broadcasting, most significantly higher audio fidelity and greater immunity to atmospheric and human-made sources of interference.
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