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<!doctype html>
<html lang="zh" class="no-js">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="description" content="介绍物联网基础概念">
<meta name="author" content="WiSys Lab">
<link rel="icon" href="/assets/images/favicon.png">
<meta name="generator" content="mkdocs-1.3.1, mkdocs-material-8.4.0">
<title>物联网前沿实践 - 清华大学 - 王继良</title>
<link rel="stylesheet" href="/assets/stylesheets/main.69437709.min.css">
<link rel="stylesheet" href="/assets/stylesheets/palette.cbb835fc.min.css">
<meta name="theme-color" content="#546d78">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback">
<style>:root{--md-text-font:"Roboto";--md-code-font:"Roboto Mono"}</style>
<script>__md_scope=new URL("/",location),__md_hash=e=>[...e].reduce((e,_)=>(e<<5)-e+_.charCodeAt(0),0),__md_get=(e,_=localStorage,t=__md_scope)=>JSON.parse(_.getItem(t.pathname+"."+e)),__md_set=(e,_,t=localStorage,a=__md_scope)=>{try{t.setItem(a.pathname+"."+e,JSON.stringify(_))}catch(e){}}</script>
</head>
<body dir="ltr" data-md-color-scheme="" data-md-color-primary="blue-grey" data-md-color-accent="deep-orange">
<input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off">
<input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
<label class="md-overlay" for="__drawer"></label>
<div data-md-component="skip">
</div>
<div data-md-component="announce">
</div>
<header class="md-header" data-md-component="header">
<nav class="md-header__inner md-grid" aria-label="页眉">
<a href="/." title="物联网前沿实践" class="md-header__button md-logo" aria-label="物联网前沿实践" data-md-component="logo">
<img src="/images/nicon.png" alt="logo">
</a>
<label class="md-header__button md-icon" for="__drawer">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M3 6h18v2H3V6m0 5h18v2H3v-2m0 5h18v2H3v-2Z"/></svg>
</label>
<div class="md-header__title" data-md-component="header-title">
<div class="md-header__ellipsis">
<div class="md-header__topic">
<span class="md-ellipsis">
物联网前沿实践
</span>
</div>
<div class="md-header__topic" data-md-component="header-topic">
<span class="md-ellipsis">
</span>
</div>
</div>
</div>
<label class="md-header__button md-icon" for="__search">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>
</label>
<div class="md-search" data-md-component="search" role="dialog">
<label class="md-search__overlay" for="__search"></label>
<div class="md-search__inner" role="search">
<form class="md-search__form" name="search">
<input type="text" class="md-search__input" name="query" aria-label="搜索" placeholder="搜索" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="search-query" required>
<label class="md-search__icon md-icon" for="__search">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5Z"/></svg>
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12Z"/></svg>
</label>
<nav class="md-search__options" aria-label="查找">
<button type="reset" class="md-search__icon md-icon" aria-label="清空当前内容" tabindex="-1">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41Z"/></svg>
</button>
</nav>
</form>
<div class="md-search__output">
<div class="md-search__scrollwrap" data-md-scrollfix>
<div class="md-search-result" data-md-component="search-result">
<div class="md-search-result__meta">
正在初始化搜索引擎
</div>
<ol class="md-search-result__list"></ol>
</div>
</div>
</div>
</div>
</div>
</nav>
</header>
<div class="md-container" data-md-component="container">
<main class="md-main" data-md-component="main">
<div class="md-main__inner md-grid">
<div class="md-sidebar md-sidebar--primary" data-md-component="sidebar" data-md-type="navigation" >
<div class="md-sidebar__scrollwrap">
<div class="md-sidebar__inner">
<nav class="md-nav md-nav--primary" aria-label="导航栏" data-md-level="0">
<label class="md-nav__title" for="__drawer">
<a href="/." title="物联网前沿实践" class="md-nav__button md-logo" aria-label="物联网前沿实践" data-md-component="logo">
<img src="/images/nicon.png" alt="logo">
</a>
物联网前沿实践
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="/0_%E5%89%8D%E8%A8%802/" class="md-nav__link">
第2版前言
</a>
</li>
<li class="md-nav__item">
<a href="/0_%E5%89%8D%E8%A8%801/%E7%89%A9%E8%81%94%E7%BD%91%E5%AF%BC%E8%AE%BA/" class="md-nav__link">
第1版前言
</a>
</li>
<li class="md-nav__item">
<a href="/1_%E7%89%A9%E8%81%94%E7%BD%91%E6%A6%82%E8%BF%B0/" class="md-nav__link">
第1章 物联网概述
</a>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_4" type="checkbox" id="__nav_4" >
<label class="md-nav__link" for="__nav_4">
第2章 信号处理基础
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" aria-label="第2章 信号处理基础" data-md-level="1">
<label class="md-nav__title" for="__nav_4">
<span class="md-nav__icon md-icon"></span>
第2章 信号处理基础
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="/2_%E4%BF%A1%E5%8F%B7%E5%A4%84%E7%90%86%E5%9F%BA%E7%A1%80/S1_%E4%BF%A1%E5%8F%B7%E7%9A%84%E5%8F%91%E9%80%81%E5%92%8C%E6%8E%A5%E6%94%B6/" class="md-nav__link">
2.1 信号生成、发送和接收
</a>
</li>
<li class="md-nav__item">
<a href="/2_%E4%BF%A1%E5%8F%B7%E5%A4%84%E7%90%86%E5%9F%BA%E7%A1%80/S2_%E6%A8%A1%E6%8B%9F%E4%BF%A1%E5%8F%B7%E5%92%8C%E6%95%B0%E5%AD%97%E4%BF%A1%E5%8F%B7%E4%BB%8B%E7%BB%8D/" class="md-nav__link">
2.2 从模拟到数字
</a>
</li>
<li class="md-nav__item">
<a href="/2_%E4%BF%A1%E5%8F%B7%E5%A4%84%E7%90%86%E5%9F%BA%E7%A1%80/S3_%E4%BF%A1%E5%8F%B7%E9%87%87%E6%A0%B7%E4%B8%8E%E9%87%87%E6%A0%B7%E5%AE%9A%E7%90%86/" class="md-nav__link">
2.3 信号采样与采样定理
</a>
</li>
<li class="md-nav__item">
<a href="/2_%E4%BF%A1%E5%8F%B7%E5%A4%84%E7%90%86%E5%9F%BA%E7%A1%80/S4_%E4%BF%A1%E5%8F%B7%E9%87%8F%E5%8C%96/" class="md-nav__link">
2.4 信号量化
</a>
</li>
<li class="md-nav__item">
<a href="/2_%E4%BF%A1%E5%8F%B7%E5%A4%84%E7%90%86%E5%9F%BA%E7%A1%80/S5_%E6%A1%88%E4%BE%8B%EF%BC%9A%E5%AE%9E%E7%8E%B0%E4%B8%80%E4%B8%AA%E5%BD%95%E9%9F%B3%E3%80%81%E6%94%BE%E9%9F%B3%E7%A8%8B%E5%BA%8F/" class="md-nav__link">
2.5 案例：声音采集与播放
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_5" type="checkbox" id="__nav_5" >
<label class="md-nav__link" for="__nav_5">
第3章 傅里叶分析
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" aria-label="第3章 傅里叶分析" data-md-level="1">
<label class="md-nav__title" for="__nav_5">
<span class="md-nav__icon md-icon"></span>
第3章 傅里叶分析
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="/3_%E5%82%85%E9%87%8C%E5%8F%B6%E5%88%86%E6%9E%90/S1_%E5%82%85%E9%87%8C%E5%8F%B6%E5%88%86%E6%9E%90%E4%B8%80%E6%AE%B5%E5%8E%86%E5%8F%B2/" class="md-nav__link">
3.1 历史与发展
</a>
</li>
<li class="md-nav__item">
<a href="/3_%E5%82%85%E9%87%8C%E5%8F%B6%E5%88%86%E6%9E%90/S2_%E5%82%85%E9%87%8C%E5%8F%B6%E7%BA%A7%E6%95%B0/" class="md-nav__link">
3.2 傅里叶级数
</a>
</li>
<li class="md-nav__item">
<a href="/3_%E5%82%85%E9%87%8C%E5%8F%B6%E5%88%86%E6%9E%90/S3_%E5%82%85%E9%87%8C%E5%8F%B6%E5%8F%98%E6%8D%A2/" class="md-nav__link">
3.3 傅里叶变换
</a>
</li>
<li class="md-nav__item">
<a href="/3_%E5%82%85%E9%87%8C%E5%8F%B6%E5%88%86%E6%9E%90/S4_%E7%A6%BB%E6%95%A3%E5%82%85%E9%87%8C%E5%8F%B6%E5%88%86%E6%9E%90/" class="md-nav__link">
3.4 离散傅里叶分析
</a>
</li>
<li class="md-nav__item">
<a href="/3_%E5%82%85%E9%87%8C%E5%8F%B6%E5%88%86%E6%9E%90/S5_%E7%9F%AD%E6%97%B6%E5%82%85%E9%87%8C%E5%8F%B6%E5%8F%98%E6%8D%A2/" class="md-nav__link">
3.5 案例：短时傅里叶与频谱
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6" type="checkbox" id="__nav_6" >
<label class="md-nav__link" for="__nav_6">
第4章 无线信道
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" aria-label="第4章 无线信道" data-md-level="1">
<label class="md-nav__title" for="__nav_6">
<span class="md-nav__icon md-icon"></span>
第4章 无线信道
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="/4_%E6%97%A0%E7%BA%BF%E4%BF%A1%E9%81%93/S1_%E4%BF%A1%E9%81%93%E5%AE%9A%E4%B9%89/" class="md-nav__link">
4.1 定义与概念
</a>
</li>
<li class="md-nav__item">
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4.2 路径损耗与阴影衰落
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4.3 多径信道模型
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4.4 案例：信道仿真与测量
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</ul>
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第5章 信号滤波
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第5章 信号滤波
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5.1 数字滤波器简介
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5.2 滑动平均滤波器
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5.3 FIR数字滤波器
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5.4 IIR数字滤波器
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5.5 高级IIR滤波器
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5.6 案例：滤波器比较与选择
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第6章 数据调制和解调
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第6章 数据调制和解调
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6.1 引言
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6.2 幅度调制
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6.3 频率调制
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6.4 相位调制
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6.5 载波上变频
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6.6 调制方法综合应用
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6.7 案例：简单无线通信系统
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第7章 短距离无线通信技术
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第7章 短距离无线通信技术
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7.1 Wi-Fi
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7.2 蓝牙
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7.3 ZigBee
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7.4 案例：蓝牙连接实验
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第8章 Backscatter通信
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第8章 Backscatter通信
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8.1 Backscatter基本原理
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8.2 RFID
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8.3 泛在信号Backscatter
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第9章 LoRa
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第9章 LoRa
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9.1 LoRa 发展简史
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9.2 LoRa 通信技术
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9.3 LoRa 冲突解码算法
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