基于MATLAB的扩频通信系统仿真研究72187.docVIP

通信系统综合设计与实践 题目 基于MATLAB的扩频通信系统仿真研究 院（系）名称 信息工程学院通信系 专业名称 通信工程 学生姓名 李楠 杨楠 李长蔚 学生学号 1203100044 1203100005? 1203100031 指导教师 陈万里 2013年 6 月 5 日 目录 摘要………………………………………………………………......1 1、设计目的………………………………………………………….2 2、扩展频谱通信技术.....................................2 2.1、理论基础.............................................2 2.2 、实现方法...........................................2 3、系统仿真模型的建立......................................3 3.1、 Simulik简介.........................................3 3.2、模型建立及主要模块设计..............................3 3.3、几点说明............................................4 4、仿真结果分析............................................4 4.1、仿真系统运行情况分析................................4 4.2、扩频增益与输出端信噪比的关系........................5 5、结论....................................................5 心得体会..................................................5 致谢......................................................6 参考文献..................................................7 基于MATLAB的扩频通信系统仿真研究 摘要 本文阐述了扩展频谱通信技术的理论基础和实现方法，利用MATLAB提供的可视化工具Simulink建立了扩频通信系统仿真模型，详细讲述了各模块的设计，并指出了仿真建模中要注意的问题。在给定仿真条件下，运行了仿真程序，得到了预期的仿真结果。同时，利用建立的仿真系统，研究了扩频增益与输出端信噪比的关系，结果表明，在相同误码率下，增大扩频增益，可以提高系统输出端的信噪比，从而提高通信系统的抗干扰能力。 关键词:　扩频通信、信噪比、误码率、扩频增益 Simulation of the Spread Spectrum Communication System Based on MATLAB Abstract: The theory base and realizing methods of the spread spectrum communication technology was presented in this study. The simulation model of the spread spectrum communication system was built by using SIMULINK, which is provided by MATLAB. In addition, each module of the simulation model was introduced in detail，and pointed out the problems that must be pay attention to in the system simulation. On the basis of the designed simulation conditions, the simulation program was run and the anticipant results were gained. Moreover, the relationship between the spread spectrum gain and the fan-out error rate was also studied by use of the simulation system. The results showed that on