基于LabVIEW的正交振幅调制解调通信实验系统设计  

Design of Experimental System for Quadrature Amplitude Modulation and Demodulation Communication Based on LabVIEW

作　　者：贾勇[1] 倪铭徽 吴慕云 秦富鸿 刘明哲 JIA Yong;NI Minghui;WU Muyun;QIN Fuhong;LIU Mingzhe(College of Information Science and Technology(College of Cyber Security,Oxford Brookes College),Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学信息科学与技术学院(网络安全学院,牛津布鲁克斯学院),成都610059

出　　处：《实验室研究与探索》2021年第5期112-118,共7页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(61501062,41574136);四川省科技计划项目(2019YFG0097);四川省2018-2020年高等教育人才培养质量和教学改革项目(JG2018-462)。

摘　　要：正交振幅调制技术作为一项最为重要的现代通信调制技术,已广泛应用于移动通信、有线电视传输、数字视频广播卫星通信、软件无线电等领域。为深入研究正交振幅调制通信技术的特点,了解该技术流程的各个过程,设计了一种基于LabVIEW的正交振幅调制与解调通信实验系统。该系统包括基带信号生成、正交振幅调制、解调和基带信号恢复的全过程,同时附以各阶段中间过程的信号波形图和星座图以供调试参考。该实验设计了16QAM和64QAM两种正交振幅调制方式,并可进行调制方式的切换,以及进行用户自定义基带信号的实验验证,使正交振幅调制通信技术原理及有关过程得以更加直观地体现。Being one of the most significant techniques of signal modulation of modern telecommunication,quadrature amplitude modulation has already been applied in many fields including mobile communication,cable TV signal transmission,digital satellite TV system,and software defined radio.In order for the better and deeper study of this communication technique,including its technical features and detailed procedure,being well carried out,a design for an emulated experimental system based on LabVIEW is proposed,it covers all the procedures required during a QAM-based communication system,including baseband signal generation,quadrate amplitude modulation and demodulation,baseband signal restoration,along with signal waveforms of different communication stages and a constellation diagram for reference and test.In this experimental system,two similar types of QAM,16 QAM and 64 QAM,are innovatively designed and can be switched immediately with user-customized input for further study,hyalinizing the whole process of QAM communication.

关 键 词：正交振幅调制 模型设计 通信系统 实验教学 

分 类 号：TN914.3[电子电信—通信与信息系统]