Last Updated:2025/11/26

The engineer explained how quadrature amplitude modulation increases spectral efficiency by encoding bits in both the amplitude and phase of two carriers.

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The engineer explained how quadrature amplitude modulation increases spectral efficiency by encoding bits in both the amplitude and phase of two carriers.

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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。

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