基于DSP的短波通信系统设计（同步）

文档编号:TX435  文档字数:18589,页数:27

 摘要
 本文档介绍了基于DSP的短波通信以及短波通信系统应用的一种重要技术——同步技术。概述了非相干解调的数字短波通信系统同步器部分所采用的位同步和群同步技术。最后展望了基于DSP的短波通信的发展前景。
 极低信噪比条件下的短波通信是一种应急通信，本文档较详尽地介绍了极低信噪比条件下的话带低速率的短波同步器的设计原理以及其采用的关键技术：同步技术、短波通信技术、DSP技术、分集接收技术以及数字解调技术，并且给出了用DSP设计该短波同步器的硬件结构和软件实现。大量的实验数据表明,本文档设计的同步器在极低信噪比的条件下能够良好地工作。
 
 关键词：短波通信，数字信号处理，同步,分集接收
 
    
 ABSTRACT
 This paper introduced according to the DSP short-wave correspondence and an important technique of the short-wave correspondences--synchronous technique.Said all not concern with the numerical short-wave that solution adjust correspondence system synchronous that the machine part adopt synchronous and cluster synchronous technique.Prospected finally according to the development foreground of the DSP short-wave correspondence.
 Very low rate of the power of signal and noise under condition of short-wave correspondence is a kind of to meet an emergency the correspondence, this paper compared to introduce the very low rate of the power of signal and noise in details than under condition of words take the short-wave of the low speed rate  design principle of the synchronous machine and the key technique that it adopt:the synchronous technique, short-wave corresponds by letter the technique, technique of DSP and divides to gather to receive the technique and numerals solution to adjust the technique, and give design that short-wave with the DSP synchronous the hardware structure and softwares of the machine realization.A great deal of experiment data express, the synchronous machine of this paper design under the condition of very low rate of the power of signal and noise can work goodly.

Keywords:short-wave communication,DSP, synchronous，the cent gathers to receive

目录
1绪论………………………………………………………………………………1
 1.1 文档背景……………………………………………………………………1
 1.2 文档目的……………………………………………………………………1
2基于DSP的短波通信……………………………………………………………2
 2.1 短波通信的发展……………………………………………………………2
 2.2短波通信的工作原理及特点………………………………………………4
 2.3 DSP简介……………………………………………………………………6
 2.4 DSP技术在通信中的应用…………………………………………………8
 2.5 基于DSP的短波通信的发展………………………………………………8
3同步技术………………………………………………………………………10
 3.1同步的概念及方式………………………………………………………10
 3.2同步的方法………………………………………………………………10
4基于DSP的短波同步器的设计………………………………………………15
 4.1设计任务…………………………………………………………………15
 4.2数字信号处理的优势……………………………………………………15
 4.3同步器的设计实现………………………………………………………16
 4.3.1同步方式的选择……………………………………………………16
 4.3.2 总体设计……………………………………………………………17
 4.3.3 具体设计……………………………………………………………18
 4.4 同步器的DSP实现………………………………………………………20
 4.4.1芯片的选择…………………………………………………………20
 4.4.2数据收发与同步提取………………………………………………20
 4.5 分集接收 ………………………………………………………………24
5总结……………………………………………………………………………25
 参考文献………………………………………………………………………26
 致谢……………………………………………………………………………27

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