摘 要通信系统的设计、实验过程中，通信信号仿真具有灵活性好、经济等诸多优点，为通信系统讨论工作带来了极大的方便。本通信仿真平台的任务是对调幅、双边带、单边带、调频、调相五种模拟通信信号的调制和解调进行建模和计算 ，以及对2ASK，2FSK，2PSK，2DPSK 四种数字通信信号的调制和解调进行建模和计算。该仿真平台实现了不同设计参数下各个信号的时域和频域图形的绘制，从而很好的为教学提供了帮助。通信仿真充分考虑了调制样式和噪声大小以及在调制过程中的各种参数对通信信号性能的影响，完成了对模拟以及数字信号建模计算，得到了时域波形和频谱，能够直观的显示各种参数对各种调制样式的通信的影响。本文做了以下工作：以 MATLAB 为工具，主要应用 MATLAB 中的 GUI（图形用户接口）程序设计，设计实现了一个通信平台，能模拟九种调制信号的产生，传输以及解调接收，实现了在平台上进行参数输入和图形输出的交互功能。关键词：调制；解调；仿真；MATLAB；GUIAbstractIn the design and test of the communication system, communicating signal simulation possesses many advantages, such as good flexibilities, economy e.g. And it takes great convenience to the research of communication system. The target of the communication system flat is modeling and calculating to modulation and demodulation of five kinds of signals: AM,DSB,SSB,FM,PM.The task of the communication simulation platform for modeling and calculation of 2ASK, 2FSK, 2PSK, 2DPSK four digital communications signal modulation and demodulation. The simulation platform realized the drawing of time domain graphics and frequency domain graphics to the different design parameters of each signal .Communicating simulation considers the effects of modulation mode, noise level and modulating parameters to communication, modeling calculation, creation of the four time periods waveform and spectrum deeply and widely. It’s convenient to display intuitionisticly the effects of parameters to modulation modes. This paper made the following j...
