摘要扩频通信和光纤通信、卫星通信共同享有信息时代的三大高技术通信传输方式之称。作为一项高技术信息传输方式，扩频通信技术在现代移动通信系统中占据着举足轻重的地位。

本文简要说明了扩频通信技术的研究意义和现状背景，扩频通信的相关理论和实际应用，扩频通信的基本概念，工作原理和它的实现方法。本文选取了直接序列扩频通信系统和跳频通信系统进行仿真研究。研究采用了MATLAB中的Simulink工具，建立系统模型，分别总结了m序列的关联性，通过仿真结果对比观察跳频通信和直接扩频的频谱图形，且得出在信噪比-20dB的环境下，进行直接扩频通信，不考虑差错控制，误码率可以达到0。75%。72715

该论文有图20幅，参考文献23篇。

毕业论文关键词：扩频通信  直扩序列  Simulink  跳频扩频   

Simulation of spread spectrum communication system based on Simulink

Abstract Spread spectrum communications and fiber-optic communications, satellite communications, to enjoy the three major high-tech communications transmission mode known as the information age。 As a high-tech information transmission, spread spectrum communication technology occupies a pivotal position in the modern mobile communication systems。

This article briefly describes the significance and background of today’ s spread spectrum communication technology, theory and practical application of spread spectrum communication, basic concepts of spread spectrum communication, working principle and its implementation。 This paper selects direct sequence spread spectrum communication system and frequency hopping communication system simulation。 The study used the MATLAB Simulink tools to build the system model, summarize the relevance of the m-sequence by simulation results observed spectrum frequency hopping communication graphics and direct spread and draw in the signal to noise ratio of -20dB environment，direct spread spectrum communication, without considering error control, error rate of up to 0。75%。

In this paper,a total of 20 pictures, 23 references。

Key words: Spread Spectrum  Direct Sequence Spread Spectrum  Simulink

Frequency-Hopping Spread Spectrum 

目录

摘 要 Ⅰ

Abstract Ⅱ

目 录 Ⅲ

图清单 Ⅳ                                                               

1 引言 1

1。1课题背景 1

1。2研究意义及扩频通信技术的发展现状 1

1。3本文研究的主要内容 2

2 扩频通信技术 4

2。1扩频通信基本概念 4

2。2扩频通信技术应用 6

2。3直接序列扩频 8

2。4跳频扩频系统 11

3 Simulink介绍 13

3。1Simulink的特点 13

3。2Simulink的主要功能 13

4 扩频通信系统仿真 15

4。1扩频通信原理的仿真 15

4。2产生m序列的仿真