波特率与比特率简介

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                    <section><section powered-by="gulangu"><section><section><p><img src="image/20201019/f56b8f6ed000f7630a471d4e18527d7a_1.gif" /></p></section></section></section><section powered-by="gulangu"><section><section><p>波特率</p></section><p><img src="image/20201019/c4638eecb40a84deabcab73e412faa6e_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; 波特率是指数据信号对载波的调制速率，它用单位时间内载波调制状态改变的次数来表示，单位是波特（band）。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;在信息传输通道中，携带数据信息的信号单元叫码元。每秒钟通过信道传输的码元数称为码元传输速率，简称波特率。波特率是传输通道频宽的指标。</p></section></section></section><section powered-by="gulangu"><section><section><p>比特率</p></section><p><img src="image/20201019/c4638eecb40a84deabcab73e412faa6e_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;在数字信道中，比特率是数字信号的传输速率。它用单位时间内传输的二进制代码的有效位（bit）数来表示，其单位为每秒比特数bit/s（bps）。</p></section></section></section><section powered-by="gulangu"><section><section><p>波特率与比特率的关系</p></section><p><img src="image/20201019/c4638eecb40a84deabcab73e412faa6e_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; 波特率与比特率的关系为：<span>比特率</span><span>=</span><span>波特率</span><span>X</span><span>单个调制状态对应的二进制位数。即</span></p><p>比特率<span>=&nbsp;</span><span>波特率</span><span>*&nbsp;log2n 。</span></p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;显然，两相调制<span>(</span><span>单个调制状态对应</span><span>1</span><span>个二进制位</span><span>)</span><span>的比特率等于波特率；四相调制</span><span>(</span><span>单个调</span><span>制状态对应</span><span>2</span><span>个二进制位</span><span>)</span><span>的比特率为波特率的两倍；</span><span>八相调制</span><span>(</span><span>单个调制状态对应</span><span>3</span><span>个二进制位</span><span>)</span><span>的比特率为波特率的三倍；依次类推。</span></p><p><span></span></p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>欢</p></section></section></section></section><section><section powered-by="gulangu"><section><section><p>迎</p></section></section></section></section><section><section powered-by="gulangu"><section><section><p>关</p></section></section></section></section><section><section powered-by="gulangu"><section><section><p>注</p></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><img src="image/20201019/495d1fd9dbc3c74cca003525c26c90b8_5.jpg" /></p></section></section></section></section><section><section powered-by="gulangu"><section><section></section></section></section></section><section><section powered-by="gulangu"><section><section><p>关注我们</p><p>一起涨姿势！</p></section></section></section></section></section></section></section>