摘要跳频通信技术是扩频通信技术的一种，它的工作原理是收发双方传输信号的载波频率按照预定规律进行离散变化。也就是说，通信中使用的载波频率受伪随机变化码的控制而随机跳变。跳频通信也具有良好的抗干扰能力，因此被广泛地应用于军事领域。与一般的数字通信系统一样，跳频通信系统也要求实现载波同步、位同步和帧同步等。本文在上述理论基础上利用MATLAB软件搭建一个基本的跳频通信系统，并对其进行仿真，观察它的系统组成及同步等问题。MATLAB软件是美国MathWorks公司出品的商业数学软件，用于算法开发、数据可视化、数据分析以及数值计算的高级技术计算语言和交互式环境，主要包括MATLAB和Simulink两大部分。我们所使用的工具正是simulink。Simulink提供一个动态系统建模、仿真和综合分析的集成环境。在该环境中，无需大量书写程序，而只需要通过简单直观的鼠标操作，就可构造出复杂的系统。通过在simulink中仿真，我们观察了各部分的输出波形，明白了系统各部分的功能，并且观测到了跳频系统的同步建立时间。64914

毕业论文关键词：跳频通信 MATLAB 仿真 同步

毕业设计说明书（论文）外文摘要

Title   The Simulation Of Frequency-hopping Communication Systems                    

Abstract

Frequency hopping communication technology is a kind of spread spectrum communication technology, its working principle is refers to that the transmission signal carrier frequency of the sending and receiving should be changed in the discrete way According to the scheduled rule. That is to say, the carrier frequency is used in communication is controlled by the pseudo random code and random jump. Frequency hopping communication also has a good anti-interference ability, thus it is widely used in military field. Like the general digital communication system, frequency hopping communication system also requires to achieve carrier synchronization, bit synchronization and frame synchronization, etc. Based on the above theory ,we use the MATLAB software to set up a basic frequency hopping communication system, and carries on the simulation and observe its system composition and the problems of synchronization . MATLAB is produced by the American MathWorks company as a business mathematics software for algorithm development, data visualization, data analysis and numerical calculation , a senior technical computing language and interactive environment,.Mainly including two parts. MATLAB and Simulink . Simulink provides a dynamic system modeling, simulation and comprehensive analysis of the integration of the environment. In the environment, without a lot of writing program, and just through simple and intuitive the mouse operation, can construct a complex system. Through the simulation in simulink, we observed the output waveform of each part, understand the functions of the parts of the system, and observed the setup time of frequency hopping system .

Keywords: Frequency hopping communication  synchronization MATLAB simulation

目  录

1 绪论 1

1.1通信历史 1

1.2扩频通信的基本概念和理论基础 2

1、扩频通信的定义 2

2、扩频通信理发展 3

3、扩频通信的原理 3

4、扩频通信的主要特点 5

1.3跳频技术 7

1、跳频通信技术定义 7

2、跳频通信技术发展趋势