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 spreadspectrum communication based on Systemview. In the simulation design, we use a trigger to generate a pseudo-period PN sequence as a spreading code, and multiply 2PSK signal and spread code to realize spread spectrum modulation. Finally, we combine 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.
出处
《电子设计工程》
2016年第11期99-101,共3页
Electronic Design Engineering
关键词
伪随机序列
扩频通信
触发器
香农公式
扩频码
pseudo random sequences
spread spectrum communication
trigger
shannon formula
spreading code
