Quadrature-amplitude-modulation definition

See QAM.
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(radio) A modulation scheme that conveys data by applying amplitude modulation to two carrier waves at once. These two waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature carriers. Commonly abbreviated QAM.
noun
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Other Word Forms

Noun

Singular:
quadrature-amplitude-modulation
Plural:
quadrature amplitude modulations