Last Updated：2025/11/26

Dictionary quizzes to help you remember the meaning

Dictionary quizzes to help you remember the meaning

quadrature amplitude modulation

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Source Word

quadrature amplitude modulation

Noun

countable uncountable

(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.

Japanese Meaning

二つの搬送波に対して同時に振幅変調を施すことでデータを伝送する変調方式。これら二つの搬送波は通常、正弦波を用い、互いに90度の位相差を持つ直交状態にあるため「直交振幅変調」と呼ばれ、一般にQAMと略される。

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Google Translation / DeepL Translation

技術者は、直交振幅変調が位相差90度の2つの搬送波に対して同時に振幅変調を行うことで、振幅と位相の両方にビットを符号化してスペクトル効率を高める仕組みを説明した。

Sense（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.

quadrature amplitude modulations

（ plural ）

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