模拟通信原理实验系统仿真方法研究  

Study on Simulation Method for Experiment System of Analog Communication Principle

作　　者：吴戈[1] 霍佳雨[2] 王晴[1] 田小建[1] WU Ge;HUO Jiayu;WANG Qing;TIAN Xiaojian(College of Electronic Science and Engineering,Jilin University,Changchun 130012,China;College of Communication Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学电子科学与工程学院 [2]吉林大学通信工程学院,长春130012

出　　处：《吉林大学学报（信息科学版）》2023年第4期575-582,共8页Journal of Jilin University（Information Science Edition）

基　　金：吉林省科技发展计划基金资助项目(20200401125GX);吉林大学2021年实验技术基金资助项目(SYXM2021b010)。

摘　　要：为解决传统通信原理实验箱在对信号处理和检测方面存在的不足,需要利用仿真对实验现象进行更全面的展示,而Simulink和LabVIEW等软件只能对数字通信系统进行仿真。为此,采用Multisim实现了对脉冲幅度调制(PAM:Pulse Amplitude Modulation)编译码、频移键控(FSK:Frequency Shift Keying)调制解调和相移键控(PSK:Phase Shift Keying)调制解调等模拟通信系统的元器件级电路仿真。通过仿真,直观地展示了抽样定理、锁相环和科斯塔斯环的内在工作机理,并深入分析了FSK解调过程中可能出现的两种失真的机理。In order to overcome the shortcomings of the traditional experiment box of the communication principle in signal processing and detection,it is necessary to use simulation to show the experimental phenomena in a more comprehensive way.However,Simulink,LabVIEW,and other software can only simulate the digital communication system.To solve this problem,Multisim is used to perform component-level circuit simulation of analog communication systems,including PAM(Pulse Amplitude Modulation)encoding and decoding,FSK(Frequency Shift Keying)modulation and demodulation,and PSK(Phase Shift Keying)modulation and demodulation.Through simulation,the inherent working mechanisms of sampling theorem,phase-locked loop,and Costas loop are intuitively demonstrated,and the principles of two possible distortions that can occur during FSK demodulation are thoroughly analyzed.

关 键 词：通信原理实验 MULTISIM仿真 脉冲幅度调制 频移键控 相移键控 

分 类 号：TN914[电子电信—通信与信息系统]