基于SystemView的扩频通信系统的仿真和分析

摘要

本文阐述了扩频通信的基本原理，使用Systemview软件对扩频通信进行仿真设计。在仿真设计中，我们使用了触发器产生PN周期伪随即序列作为扩频码，使用2PSK调制信号与扩频码相乘实现扩频调制。最后，我们结合香农公式以及信号在扩频通信传输过程中的频谱变化，证明通过扩频通信，能在噪声增加的情况下，仍然保持信号的高速无差错传输。%This paper describes the basic principles of spread-spectrum communication, builds simulation system of spread-spectrum communication based on Systemview. In the simulation design, we use a trigger to generate a pseudo-period PN se-quence as a spreading code, and multiply 2PSK signal and spread code to realize spread spectrum modulation. Finally, we com-bine the Shannon formula and changes of signal spectrum in the spread spectrum transmission to evidence that signal can maintain a error-free transmission at high speed under the high noise by using spread spectrum communication.