基于MATLAB的扩频通信系统仿真研究

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。

Simulation of the Spread Spectrum Communication System Based on MATLAB

The theory base and realizing methods of the spread spectrum communication technology was presented in this study. Thesimulation model of the spread spectrum communication system was built by using SIMULINK, which is provided by MATLAB. Inaddition, each module of the simulation model was introduced in detail, and pointed out the problems that must be pay attention toin the system simulation. On the basis of the designed simulation conditions, the simulation program was run and the anticipant re-sults were gained. Moreover, the relationship between the spread spectrum gain and the fan- out error rate was also studied by use ofthe simulation system. The results showed that on the base of the same error rate, if the spread spectrum gain was enlarged, the Sig-nal- to- Noise of the system fan- out would be enhanced and the anti- jamming capability of the communication system would also beenhanced.