在通信技术的发展中，通信系统的仿真技术是一个技术重点。本文将着重讨论模拟通信系统中的调制解调系统的基本原理，并在MATLAB软件平台上仿真实现几种常见的模拟调制方式。-In the development of communication technology and communication systems simulation technology is a technology focus. This article will focus on the basic principles of analog communication systems, modulation and demodulation system, several common analog modulation and simulation in the MATLAB software platform.