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docs/notes/计算机网络 - 物理层.md
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<!-- GFM-TOC -->
* [通信方式](#通信方式)
* [带通调制](#带通调制)
<!-- GFM-TOC -->
[TOC]
# 通信方式
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模拟信号是连续的信号，数字信号是离散的信号。带通调制把数字信号转换为模拟信号。
<div align="center"> <img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/c34f4503-f62c-4043-9dc6-3e03288657df.jpg" width="500"/> </div><br>
<img src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/c34f4503-f62c-4043-9dc6-3e03288657df.jpg" width="500"/>
<div align="center"><img width="320px" src="https://cs-notes-1256109796.cos.ap-guangzhou.myqcloud.com/githubio/公众号二维码-1.png"></img></div>