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词汇
Quadrature Amplitude Modulation
释义
Quadrature Amplitude Modulation
正交振幅调变(=QAM)
一种调制数字信号的编码方式,它兼用振幅编码和相位编码。该方法既可以用於下行,也可以用於上行。该方法能充分利用带宽,并且抗噪声能力强。
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