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性能分析的传播技术使用不同扩频编码"

于 2022-03-04 发布 文件大小:2.20 kB
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在现代通信系统中,扩频正在发挥越来越重要作用每天由于其固有的优势,像抗扰度和也由于其实际应用程序 (如移动通信 CDMA 中。多代码司多址 (CDMA) 直接序列 (DS) 扩频与执行是无线通信中最重要的新兴技术之一。扩频调制系统,在该频道的所有用户在整个通道都传输在相同的时间信息。因为信息传送这这样简单地 类似于噪音,很难拦截,因此它提供高安全性。这种技术有许多超过其他多个访问方法的优势。它包括更好的频率效率、 功率利用率和噪音的灵活性。 该项目旨在生成 pn 序列,黄金代码和调制消息信号产生相应的风言风语基带调制的信号,实际上在用于更高比例的像 CDMA 技术在语音和数据信号传输。该项目还采用了发射机和接收机单位直接序列扩频,哪里接收机解调整个接收的信号探测与相同的 pn 序列和黄金代码是用于在发射机的援助。

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