数字调制信号解调分析软件的设计  

Design of software for demodulating the digital demodulation signal

作　　者：孟玲丽[1] 黄建国[1] 李力[1] 

机构地区：[1]电子科技大学自动化工程学院,成都610054

出　　处：《电子测量技术》2008年第4期127-130,共4页Electronic Measurement Technology

摘　　要：本文介绍了一种基于LabVIEW7.0平台的数字调制信号解调分析软件的设计过程,并给出该软件的设计界面及核心算法的结构框图与具体实现。结合NIPXI-5124数据采集卡及数字正交解调的基本原理,该软件可实现对离散化的数字调制信号进行解调分析,同时直观地显示处理结果。结果表明,该软件在保证低的误码率基础上能满足高性能解调分析仪的要求。同时,利用LabVIEW7.0这种图形化的编程语言在界面设计及控制实现方面的简洁、直观性,该软件的开发周期得到了明显的缩短。This paper introduces the detailed design of software for demodulating the digital demodulation signal on the platform of NI LabVIEW7. 0 and presents the designed soft panel, the key arithmetic frame for signal processing and its implement. Combined the NI PXI-5124 digitizer with the principle of digital quartered demodulation,the software demodulates the dispersed signal efficiently while showing the results perspicuously. Results show that the software can satisfy a low error code ratio at the same time meeting the requirements of a high-powered demodulating and analyzing device. The development period of this software is reduced evidently making use of labVIEW7. 0 designing the interface and control easily.

关 键 词：数据采集卡 星座图 EVM RMS 比特流 

分 类 号：TN914.3[电子电信—通信与信息系统]