通信系统的Multisim仿真分析

调制和解调是通信技术的核心.鉴于Multisim分析高频电路的优点,在深入分析双边带幅度调制和解调的基础上,本文在Multisim环境下建立了一个通信系统模型.通信系统模型利用磁场感应,采用变压器模块实现天线的收发功能;采用放大器对解调信号进行放大,实现对输入信号的再现;利用Muhisim提供的示波器模块和频谱分析模块,分别对调幅波和解调波进行了波形和频谱分析.实验结果表明,Muhisim在高频电路仿真中具有快速、准确、灵活等优点.

Simulation of communication system model by Multisim

Modulation and demodulation are the core technologies of communications.Since Multisim has some advantages in analysing high frequency circuit,after the expatiating of double-side-band amplitude modulation and demodulation in detail,this paper presents the communication system model in Multisim.This communication system model uses transformer to receive and send signal and fulfills induction by magnetic,adopts demodulate signals enlarged amplifier to reproduce the signal achievement of imported,and uses the oscilloscope and spectrum analysis module to analyse waves and spectrum of modulation signal and demodulation signal.At last,the experiment results show that the simulation in high frequency circuit is more flexible,exact and quick using Multisim.