quadrature amplitude modulation

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English[edit]

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Noun[edit]

quadrature amplitude modulation ‎(plural quadrature amplitude modulations)

  1. (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.

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