贵州民族学院毕业论文

跳频扩频技术的实现

王杰昌

【摘要】:现代社会，随着一系列高新科技的飞速发展，军事领域和民用通信领域对信号的

准确性和抗干扰性要求越来越高，由此产生了具有高度优越性的跳频系统，并且其应用也越来越广泛。本文简述了扩频通信系统的原理、分类、技术指标及应用，重点阐述了跳频系统的组成及工作原理、跳频系统的关键技术包括频率合成技术和跳频同步技术；分层次地介绍了跳频序列的研究方向及现状，这其中又以蓝牙跳频序列和基于混沌序列的跳频序列族为重点。简要阐述了跳频系统与直接序列扩频系统、跳时系统和DS/FH混合跳频系统的性能比较，从而更加突出了跳频系统的优越性。最后，又介绍了几种典型的跳频组网方式，如同步正交组网、同步非正交组网、异步非正交组网，针对几种组网方式分别罗列了其优点，同时也介绍了跳频系统在CDPD、短波数据通信和GSM中的应用。跳频系统虽然也存在一些不足之处，但它的抗干扰性、低截获性、良好的抗多路径干扰性和安全性等，使其在军事和民用领域都存在着极其广阔的发展前景。

关键词：扩频通信 跳频系统 跳频同步技术 跳频序列族 跳频组网技术

Frequency-hopping spread spectrum technology

Wang Jiechang

Abstract: Modern society, with a series of the rapid development of high technology, military and civilian communications on the accuracy of the signal and the anti-interference demand is higher and higher, the advantages of high frequency hopping system, and its application is more and more widely. This paper describes the principle of spread spectrum communication systems, classification, application and technical indexes, this paper focuses on the frequency hopping system structure and working principle of the system, key technologies, including frequency synthesis technology and frequency hopping synchronous technology, Stratified introduces the fh sequence, the research direction and current on bluetooth fh sequence and based on chaotic sequences of fh sequence clan. Briefly expounds FH system and the direct sequence spread spectrum system, jumping system and DS/comparison mixed FH systems, thus more prominent superiority of the system. Finally, and introduces several kinds of typical fh networking methods, such as synchronous orthogonal networking, synchronous and asynchronous non-orthogonal

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作者: 王杰昌 ( 计算机与信息工程学院06级电子信息科学与技术专业) 指导老师: 杨国权 audit-online network, non-orthogonal several network mode respectively, listing the merit also introduces fh CDPD system in data communication and GSM, short application. Although fh system exists some shortcomings, but its anti-interference, low intercept, good multipath interference and safety, etc, make its military and civil domains exist extremely broad development prospects.

Keywords: Spread spectrum communication Frequency-hopping system Frequency-hopping synchronous technology Frequency-hopping network technology

Frequency-hopping sequence 2

贵州民族学院毕业论文

目录

第一章 绪论 ............................................................................................................... 5 第二章 扩频技术简介及理论基础 ........................................................................... 6 2.1 扩频技术简介 .................................................................................................... 6 2.2 扩频通信可行性的理论基础 ............................................................................ 6 2.2.1 香农公式 ..................................................................................................... 6 2.2.2 柯捷尔尼可夫关于信息差错传输概率的公式 ......................................... 6 2.3 扩频系统的分类及每类的应用场合 ................................................................ 7 2.3.1 直接序列扩频技术（ＤＳ） ..................................................................... 7 2.3.2 跳频扩频（FH） ......................................................................................... 8 2.3.3 跳时系统（TH） ......................................................................................... 8 2.3.4 直扩（FH）/跳频（DS）系统 ................................................................... 8 2.4 扩频系统的主要技术指标 ................................................................................ 9 2.4.1处理增益 ...................................................................................................... 9 2.4.2 抗干扰容限 ................................................................................................. 9 2.5 扩频系统的优点及应用发展现状 .................................................................. 10 2.5.1 扩频系统的主要优点 ............................................................................... 10 2.5.2 扩频系统在现实生活中的运用 ............................................................... 11 第三章 跳频扩频系统的组成及工作原理 ............................................................... 12 3.1 跳频扩频系统的组成及工作原理 .................................................................. 12 3.1.1 跳频系统的组成 ....................................................................................... 12 3.1.2 跳频系统的工作原理 ............................................................................... 12 3.2 跳频信号的波形 .............................................................................................. 14 3.3 跳频信息的发送 .............................................................................................. 15 3.4 跳频信号的解跳与解调 .................................................................................. 15 3.4.1 跳频信号的解跳 ....................................................................................... 15 3.4.2 非相干跳频解调器 ................................................................................... 16 3.5 跳频系统的主要技术指标 .............................................................................. 16 3.5.1 跳频带宽 ................................................................................................... 16 3.5.2 信道间隔 ................................................................................................... 16 3.5.3 跳频频率数目 ........................................................................................... 17 3.5.4 跳频处理增益 ........................................................................................... 17 3.5.5 跳频速率 ................................................................................................... 17 3.5.6 跳频周期 ................................................................................................... 17 3.5.7 跳频序列周期 ........................................................................................... 18 第四章 跳频系统的关键技术 ................................................................................... 19 4.1跳频图案的构造 ............................................................................................... 19 4.1.1 跳频图案设计要求 ................................................................................... 19 4.1.2跳频图案实现电路 .................................................................................... 19 4.2 频率合成技术 .................................................................................................. 20 4.3 跳频同步技术 .................................................................................................. 21

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作者: 王杰昌 ( 计算机与信息工程学院06级电子信息科学与技术专业) 指导老师: 杨国权

4.3.1设计要求 .................................................................................................... 21 4.3.2 硬件设计 ................................................................................................... 21 第五章 跳频序列设计的研究方向及现状 ............................................................... 23 5.1 蓝牙跳频序列 .................................................................................................. 23 5.2 基于混沌序列构造跳频序列族 ...................................................................... 23 5.3 短波跳频通信新的抗干扰措施 ...................................................................... 24 第六章 跳频系统与其他扩频系统的比较 ............................................................... 26 6.1 跳频系统与直接序列扩频系统的比较 .......................................................... 26 6.1.1 直接序列扩频技术的优点 ....................................................................... 26 6.1.2 直扩与跳频系统的比较 ........................................................................... 27 6.2 跳频系统与跳时系统的比较 .......................................................................... 28 6.3 跳频系统与DS/FH混合扩频的比较 .............................................................. 28 第七章 跳频组网方式及其在现实生活中的应用 ................................................... 30 7.1 跳频组网方式 .................................................................................................. 30 7.1.1 同步正交组网 ........................................................................................... 30 7.1.2 同步非正交组网 ....................................................................................... 31 7.1.3 异步非正交组网 ....................................................................................... 31 7.2 跳频技术在通信领域中的应用 ...................................................................... 32 7.2.1 跳频技术在CDPD中的应用 ..................................................................... 32 7.2.2 跳频技术在短波数据通信中的应用 ....................................................... 32 7.2.3 跳频技术在GSM中的应用 ....................................................................... 33 7.3 跳频技术在现实应用中存在的问题及发展前景 .......................................... 33 第八章 总结 ........................................................................................................... 35 致谢.............................................................................................................................. 36 参考文献： ................................................................................................................. 37

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