幅频畸变 amplitude vs frequency distortion 振幅改变信号 amplitude-change signaling 振幅频率特性,幅频特性 amplitude-frequency characteristic ..
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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.
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