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2 数据通信基础 - Tsinghua · 第2章 数据通信基础 根据包信信号的传传包包,可以分为模拟传传调数字传传。 1. 模拟传传模模模、缺缺 在模拟传传包包中,数据进入信信之前要经过调调,变换为模拟的调调信号。
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