摘要
将信号级的系统仿真软件System View应用于“现代通信原理”这门核心课程的教学中。主要对数字信号的载波传输进行仿真，根据调制原理对数字信号的载波传输中的基本信号形式振幅键控（ASK）、移频键控（FSK）、移相键控（PSK）进行分析，并把数字调制分为线性调制和非线性调制进行研究。建立通信系统的基本数学模型，根据通信系统的基本原理，确定总的系统功能，并将各部分功能模块化，且找出各部分之间的关系，画出系统框图。从各种功能库中选取、拖动可视化图符，建通信系统，在信号源图符库、算子图符库、函数图符库、信号接受器图符库中选取满足需要的功能模块，将其图符拖到设计窗口，按设计的系统图组建系统。设置、调整参数，实现系统模拟。设置观察窗口，分析模拟数据和波形。在系统的关键点处设置观察窗口，用于检查、监测模拟系统的运行情况，以便及时调整参数，分析结果。并简要介绍多进制数字调制以及由三种基本数字调制形式派生出的几种调制的原理。
关键词 System View 数字信号 载波传输 数字调制
Abstract
Applies signal level system simulation software System View to "the modern correspondence principle" in this core curriculum teaching. Mainly carries on the simulation to the digital signal carrier transmission, according to modulates the principle to in the digital signal carrier transmission elementary signal form amplitude shift keying (ASK), the frequency shift keying (FSK), the phase-shift keying (PSK) carries on the analysis, And divides into the digital modulation the linear modulation and the non-linear modulation carries on the research. The establishment communications system basic mathematical model, according to the communications system basic principle, determined the always system function, and each part of functions modulation, also discovers each part of between the relations, draws the system diagram. Selects, drives the visible chart symbol from each kind of function storehouse, constructs the communications system, in supply oscillator chart Fu Ku, operator chart Fu Ku, functional arrangement Fu Ku, signal acceptor chart Fu Kuzhong selects meets the needs the function module, designs its chart Fu Tuodao the window, sets up the system according to the design diagram. Establishment, adjustment parameter, realization system simulation. Establishment observation window, analysis analog data and profile. In the system key point place establishment observation window, uses in to inspect, the monitor analogous system movement situation, in order to promptly adjusts the parameter, analysis result. And the brief introduction multiple system numeral modulation as well as several kind of modulations principles which derives by three kind of basic digital modulations form.
Keyword System View; Digital signal; Carrier transmission; Digital modulation
目录
引言 1
1.System View系统简介 1
1.1 System View概述 1
1.2 System View的特点 1
2.数字通信系统的基本概念 2
3.数字通信系统模型 2
4.数字通信的主要特点 2
5.数字载波通信系统的几种调制方式 3
5.1二进制数字调制 4
5.1.1二进制振幅键控调制（2ASK与OOK） 4
5.1.2二进制移频键控（2FSK） 6
5.1.3二进制移相键控及二进制差分键控（2PSK及2DPSK） 10
5.2多进制数字调制 14
5.2.1 M进制数字振幅调制(MASK) 15
5.2.2 M进制数字频率调制(MFSK) 17
5.2.3多进制数字相位解调(MPSK) 19
5.3现代数字调制技术 19
5.3.1正交幅度调制(QAM) 20
5.3.2最小频移键控调制(MSK) 21
结束语 23
参考文献 23
相关网址 24
致谢 25
引言
现代通信系统是一个十分复杂的工程系统，通信系统设计研究也是一项十分复杂的技术。由于技术的复杂性，在现代通信技术中，越来越重视采用计算机仿真技术来进行系统分析和设计。随着电子信息技术的发展，已经从仿真研究和设计辅助工具，发展成为今天的软件无线电技术，这就使通信系统的仿真研究具有更重要和更实用的意义。 |
您当前的位置：
