通信原理课件 第5章 基本的数字频带传输

发送设备的基本功能是将信源和信道匹配起来，行将信源生成的信号转换成适合在信道中传输的信号。

(The basic function of the sending device is to match the source and the channel, and to convert the signal generated by the source into a signal suitable for transmission in the channel.)

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