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第5章 带通调制与解调
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第5章 带通调制与解调
Website URL:
http://staff.ustc.edu.cn/~wyzhou/chapter5%20bandpass.pdf
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Vegetable Products
3 为什么需要载波调制 • 数字基带信号的功率谱从零频开始而且集中在低频段,因此只适合在 低通型信道中传输。但常见的实际信道是带通型的,因此必须用数字
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