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“信号与系统”课程教学仿真演示平台

2015-10-27任蕾周纪

电脑知识与技术 2015年21期

任蕾 周纪

摘要:“信号与系统”是电气信息类本科专业的基础课之一,该课程理论性强,学习难度大。将信号运算、频谱分析、系统分析等知识点利用仿真演示平台配合传统教学,有助于学生掌握教学内容。开发的信号与系统教学仿真演示系统包括信号处理模块、信号和系统分析模块、信号处理应用模块、帮助模块等。该系统应用Matlab中的图形用户界面编程实现,具有良好的互动性。为配合教学,演示系统中包括了常用信号运算、信号分解、信号频谱分析、卷积运算、系统频率响应分析及各类应用等,同时为结合工程应用,系统中包含在通信、语音信号处理、图像处理领域的应用实例。该演示平台可作为传统教学的补充和辅助。

关键词:信号与系统;Matlab;教学仿真演示平台;图形用户界面

中图分类号:TN911 文献标识码:A 文章编号:1009-3044(2015)21-0180-04

Teaching Simulation Demonstration Platform for Signal and System

REN Lei, ZHOU Ji

(College of Information Engineering, Shanghai Maritime University, Shanghai 201306, China)

Abstract: Signal and system is the fundamental course for disciplines of electrical engineering and information science. The course is difficult to learn for theoretical intensity. Application of teaching demonstration system cooperated with traditional teaching is helpful for students mastering teaching contents, which includes signal computation, signal spectrum analysis and system analysis. The platform is developed using graphical user interface of Matlab with good interaction. The system includes demonstrations about typical signal computation, signal decomposition, signal spectrum analysis, convolution, frequency response analysis and applications. To cooperate with engineering application, examples concerning communication, audio signal processing and image processing are also provided. The proposed demonstration platform is the assistant for classical teaching.

Key words: signal and system; Matlab; teaching simulation demonstration platform; graphical user interface (GUI)

“信号与系统”课程是电气信息类专业的基础课,理论性强,学习难度大,互动性强的演示系统有助于课程的教学开展。近年来国内高校针对课程演示平台的开发进行了大量工作。有代表性的包括:金波等设计的“信号与系统”实验演示系统涵盖了课程中20个实验内容,系统实现了计算过程的可视化与人机互动[1]。李秀梅等开发的“信号与系统”课程图形用户(GUI,Graphical User Interface)演示系统包括信号的基本运算、信号卷积、LTI连续及离散系统、采样定理、傅里叶级数展开、滤波器设计六个模块[2]。俎云霄等开发的同类系统分为连续时间信号与系统、离散时间……

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