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CDMA通信系统中扩频序列的产生及matlab仿真程序

时间:2019-08-17 11:24来源:毕业论文
针对传统扩频序列(m序列,gold序列)的产生方法及相关特性作了简要的分析,分析了两者之间的区别并分别给出了其作为扩频码的优缺点;然后提出了混沌序列的相关知识,并在传统混

摘要随着扩频通信技术的不断发展,不管是对于民用通信还是对于军事通信,其对于通信性能的要求都越来越高,这也就意味着对于扩频码性能的要求越来越高。这使得传统应用较为广泛的m序列、gold序列等伪随机序列不再适用与新的扩频通信系统中。随着混沌理念的提出,混沌序列渐渐取代了传统伪随机序列在扩频通信中的地位。因此,对于性能更好的扩频码的研究具有重大的意思。38498
本文首先针对传统扩频序列(m序列,gold序列)的产生方法及相关特性作了简要的分析,分析了两者之间的区别并分别给出了其作为扩频码的优缺点;然后提出了混沌序列的相关知识,并在传统混沌序列的基础上给出了一种新的混沌序列,并介绍了其产生过程及特性分析。最后,针对m序列、gold序列以及混沌序列进行了matlab仿真,验证了其产生方法及相关特性,并通过对比得出了混沌序列用于扩频通信的优势所在。
毕业论文关键词 : 扩频通信  m序列  gold序列  混沌序列
Abstract  With the continuous development of spread spectrum communication technology, whether for civilian communications or for military communications, it is more and more high to the requirement of communication performance, this means that more and more high to the requirement of spread spectrum code performance. This makes the traditional application more widely m sequence, such as gold sequence pseudo random sequence is no longer apply and new spread spectrum communication system. Along with the concept of chaos, chaotic sequence gradually replaced the traditional pseudo-random sequence in spread spectrum communication. Therefore, for better performance of spread spectrum code research has significant meaning.

源¥自%六:维;论-文'网=www.lwfree.cn


 This paper aimed at the traditional spread spectrum sequence (m sequence, gold sequence) as well as on the methods and related characteristics of brief analysis, analyzes the difference between the two and it as the advantages and disadvantages of the spread spectrum code are given respectively; Then put forward the relevant knowledge of chaotic sequence, and on the basis of the traditional chaotic sequence is given a new chaotic sequence, and introduces the process and feature analysis. Finally, in view of m sequence, gold sequence and chaotic sequence has carried on the matlab simulation, verified the generation methods and related characteristics, and the chaotic sequence is obtained by comparison to the advantages of spread spectrum communication.
Keywords : Spread spectrum communication   M sequence
           Gold sequence    Chaotic sequence
目录
摘要    I
Abstract    II
1  绪论    1
1.1  研究背景及意义    1
1.2  国内外现状    1
1.3  扩频通信与码分多址    2
1.3.1  扩频通信概述    2
1.3.2  CDMA通信系统概述    3
1.4  本文内容安排    3
2  传统扩频序列    4
2.1  m序列    4
2.1.1  m序列的产生    4
2.1.2  m序列性能分析    6
2.2  Gold序列    7
2.2.1  Gold码的产生    8
2.2.2  Gold序列特性分析    10
3  关于混沌序列的基本研究    12
3.1  混沌的基本理论知识    12 源¥自%六:维;论-文'网=www.lwfree.cn
3.1.1  混沌的定义    12
3.1.2  混沌的性质    12
3.1.3  混沌的分类    13
3.1.4  典型混沌映射    14 CDMA通信系统中扩频序列的产生及matlab仿真程序:http://www.lwfree.cn/tongxin/20190817/37493.html
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