基于LabVIEW的PN码调制解调模块实现

Design of PN code modulation and demodulation module based on LabVIEW

针对伪随机码在通信传输中不可缺的功能以及其在LabVIEW中没有现成的软件工具包等问题,本文介绍了一种基于虚拟仪器的PN码调制解调实现方法。在LabVIEW8.6软件开发平台下,根据PN码调制解调原理及伪随机码生成的基本思想,设计了一种PN码调制解调实验模块。实验结果表明,该实验模块可以实现对PN码进行幅移键控、频移键控、相移键控3种调制解调功能。该实验模块满足实验技术指标且具有设计简便、成本低、扩展性好等优点。

A method of PN code modulation and demodulation based on the virtual instrument is introduced,because of the indispensable function of PN code in the communication transmission;there are no ready-made software toolkits in the LabVIEW also.This paper designs a experimental module of PN modulation and demodulation according to the principle of PN modulation and demodulation and the thought of random PN code’s generate based on the software platform LabVIEW8.6.Experimental results show that the function of ASK、FSK、PSK modulation and demodulation about pseudo random code can be realized.The module can satisfy the experimental request and take the advantage of easy design,low cost and high versatility.