用于无线电传输时，信号用载波传送，通过改变(调制)载波的振幅、频率或间隔来实现。

FOR radio transmission, inFORmation is imparted to a carrier wave by varying (modulating) its amplitude, frequency, or duration.

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用于无线电传输时，信号用载波传送，通过改变(调制)载波的振幅、频率或间隔来实现。

FOR radio transmission, inFORmation is imparted to a carrier wave by varying (modulating) its amplitude, frequency, or duration.

youdao