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radio
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netkiller committed Mar 13, 2025
commit 6e4a766546eb6ca23086451974a47ecdf1c3a5f6
6 changes: 3 additions & 3 deletions radio/ch17s03.html
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<p>Fusion 使用C4FM(连续4级频率调制),DRM使用4FSK(4级频移键控),而D-Star使用GMSK(高斯最小频移键控)。Tetra 使用π/4-差分正交相移键控调制(π/4-DQPSK)</p>
<p>DMR 使用TDMA(时分多址),C4FM和D-Star使用FDMA(频分多址)</p>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="id799"></a>17.3.1. DMR/YSF</h3></div></div></div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="id799"></a>17.3.1. DMR/YSF/P25</h3></div></div></div>

<div><img src="images/mode/DMR-YSF.png" /></div>
</div>
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<div><img src="images/mode/D-Star.png" /></div>
<div><img src="images/mode/NXDN.png" /></div>
</div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="id801"></a>17.3.3. Tatra/P25</h3></div></div></div>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="id801"></a>17.3.3. Tatra</h3></div></div></div>

<div><img src="images/mode/Tetra-P25.png" /></div>
<div><img src="images/mode/Tetra.png" /></div>

</div>
</div><script xmlns="" type="text/javascript" id="clustrmaps" src="//cdn.clustrmaps.com/map_v2.js?u=r5HG&amp;d=9mi5r_kkDC8uxG8HuY3p4-2qgeeVypAK9vMD-2P6BYM"></script><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch17s02.html">上一页</a> </td><td width="20%" align="center"><a accesskey="u" href="为什么国家会大力推广数字电台.html">上一级</a></td><td width="40%" align="right"> <a accesskey="n" href="ch17s04.html">下一页</a></td></tr><tr><td width="40%" align="left" valign="top">17.2. 声码器 </td><td width="20%" align="center"><a accesskey="h" href="index.html">起始页</a></td><td width="40%" align="right" valign="top"> 17.4. 带宽</td></tr></table></div><script xmlns="">
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4 changes: 2 additions & 2 deletions radio/index.html

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2 changes: 1 addition & 1 deletion radio/为什么国家会大力推广数字电台.html
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>第 17 章 数字电台</title><link rel="stylesheet" type="text/css" href="docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><meta name="keywords" content="Amateur Radio, ham, ham radio, icom, yaesu, kenwood,, cw,ssb,usb,lsb,am,fm,rtty,fsk,afsk,psk31, fdma,tdma,cdma, dmr,c4fm" /><link rel="home" href="index.html" title="Netkiller Amateur Radio 手札" /><link rel="up" href="digital.html" title="部分 III. 数字业余无线电" /><link rel="prev" href="digital.html" title="部分 III. 数字业余无线电" /><link rel="next" href="ch17s02.html" title="17.2. 声码器" /></head><body><a xmlns="" href="//www.netkiller.cn/">Home</a> | <a xmlns="" href="//netkiller.github.io/">简体中文</a> | <a xmlns="" href="http://netkiller.sourceforge.net/">繁体中文</a> | <a xmlns="" href="/journal/index.html">杂文</a>
| <a xmlns="" href="https://github.com/netkiller">Github</a> | <a xmlns="" href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a> | <a xmlns="" href="https://www.facebook.com/bg7nyt">Facebook</a> | <a xmlns="" href="http://cn.linkedin.com/in/netkiller/">Linkedin</a> | <a xmlns="" href="https://www.youtube.com/user/bg7nyt/videos">Youtube</a> | <a xmlns="" href="//www.netkiller.cn/home/donations.html">打赏(Donations)</a> | <a xmlns="" href="//www.netkiller.cn/home/about.html">About</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">第 17 章 数字电台</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="digital.html">上一页</a> </td><th width="60%" align="center">部分 III. 数字业余无线电</th><td width="20%" align="right"> <a accesskey="n" href="ch17s02.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&amp;repo=netkiller.github.io&amp;type=watch&amp;count=true&amp;size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&amp;repo=netkiller.github.io&amp;type=fork&amp;count=true&amp;size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&amp;type=follow&amp;count=true&amp;size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td><td></td><td><a href="https://zhuanlan.zhihu.com/netkiller"><img src="/images/logo/zhihu-card-default.svg" height="25" /></a></td><td valign="middle"><a href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a></td><td></td><td></td><td></td><td></td></tr></table><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a id="为什么国家会大力推广数字电台"></a>第 17 章 数字电台</h2></div></div></div><div class="toc"><p><strong>目录</strong></p><dl class="toc"><dt><span class="section"><a href="为什么国家会大力推广数字电台.html#id795">17.1. 为什么国家会大力推广数字电台</a></span></dt><dt><span class="section"><a href="ch17s02.html">17.2. 声码器</a></span></dt><dd><dl><dt><span class="section"><a href="ch17s02.html#id796">17.2.1. Codec2 声码器</a></span></dt><dt><span class="section"><a href="ch17s02.html#id797">17.2.2. Ambe 声码器</a></span></dt><dt><span class="section"><a href="ch17s02.html#id798">17.2.3. ACELP 声码器</a></span></dt></dl></dd><dt><span class="section"><a href="ch17s03.html">17.3. 调制模式</a></span></dt><dd><dl><dt><span class="section"><a href="ch17s03.html#id799">17.3.1. DMR/YSF</a></span></dt><dt><span class="section"><a href="ch17s03.html#id800">17.3.2. D-Star/NXDN</a></span></dt><dt><span class="section"><a href="ch17s03.html#id801">17.3.3. Tatra/P25</a></span></dt></dl></dd><dt><span class="section"><a href="ch17s04.html">17.4. 带宽</a></span></dt><dt><span class="section"><a href="ch17s05.html">17.5. 用户身份验证</a></span></dt><dt><span class="section"><a href="ch17s06.html">17.6. 中继器</a></span></dt></dl></div>
| <a xmlns="" href="https://github.com/netkiller">Github</a> | <a xmlns="" href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a> | <a xmlns="" href="https://www.facebook.com/bg7nyt">Facebook</a> | <a xmlns="" href="http://cn.linkedin.com/in/netkiller/">Linkedin</a> | <a xmlns="" href="https://www.youtube.com/user/bg7nyt/videos">Youtube</a> | <a xmlns="" href="//www.netkiller.cn/home/donations.html">打赏(Donations)</a> | <a xmlns="" href="//www.netkiller.cn/home/about.html">About</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">第 17 章 数字电台</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="digital.html">上一页</a> </td><th width="60%" align="center">部分 III. 数字业余无线电</th><td width="20%" align="right"> <a accesskey="n" href="ch17s02.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&amp;repo=netkiller.github.io&amp;type=watch&amp;count=true&amp;size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&amp;repo=netkiller.github.io&amp;type=fork&amp;count=true&amp;size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&amp;type=follow&amp;count=true&amp;size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td><td></td><td><a href="https://zhuanlan.zhihu.com/netkiller"><img src="/images/logo/zhihu-card-default.svg" height="25" /></a></td><td valign="middle"><a href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a></td><td></td><td></td><td></td><td></td></tr></table><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a id="为什么国家会大力推广数字电台"></a>第 17 章 数字电台</h2></div></div></div><div class="toc"><p><strong>目录</strong></p><dl class="toc"><dt><span class="section"><a href="为什么国家会大力推广数字电台.html#id795">17.1. 为什么国家会大力推广数字电台</a></span></dt><dt><span class="section"><a href="ch17s02.html">17.2. 声码器</a></span></dt><dd><dl><dt><span class="section"><a href="ch17s02.html#id796">17.2.1. Codec2 声码器</a></span></dt><dt><span class="section"><a href="ch17s02.html#id797">17.2.2. Ambe 声码器</a></span></dt><dt><span class="section"><a href="ch17s02.html#id798">17.2.3. ACELP 声码器</a></span></dt></dl></dd><dt><span class="section"><a href="ch17s03.html">17.3. 调制模式</a></span></dt><dd><dl><dt><span class="section"><a href="ch17s03.html#id799">17.3.1. DMR/YSF/P25</a></span></dt><dt><span class="section"><a href="ch17s03.html#id800">17.3.2. D-Star/NXDN</a></span></dt><dt><span class="section"><a href="ch17s03.html#id801">17.3.3. Tatra</a></span></dt></dl></dd><dt><span class="section"><a href="ch17s04.html">17.4. 带宽</a></span></dt><dt><span class="section"><a href="ch17s05.html">17.5. 用户身份验证</a></span></dt><dt><span class="section"><a href="ch17s06.html">17.6. 中继器</a></span></dt></dl></div>

<div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="id795"></a>17.1. 为什么国家会大力推广数字电台</h2></div></div></div>

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