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摘要: 现代社会随着通信系统的需求不断增大，对于通信系统功能的要求也随之增加。使得通信系统的性能越来也高，构造越来越复杂，但是要求通信系统的研究和产品开发周期缩短，成本降低，质量提高。这样尖利的两方面的要求，只能通过使用强大的计算机辅助分析设计技术和工具才能实现。现代计算机科学技术的飞速发展，已经研发了新一代的可视化的仿真软件。这些功能强大的仿真软件，这些强大的方正软件使得通信系统的设计和分析过程变得直管以及更加的便捷，由此也使得通信系统的发展变得更加的迅速。
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通信系统的仿真对于通信系统的发展有着举足轻重的作用，通信系统的仿真具有广泛的适应性和灵活性，对我们研究通信系统起着很好的帮助作用。
本论文介绍了通信系统的仿真的基本内容，包括通信系统的仿真的一般步骤，包括MATLAB中的可视化工具Simulink以及S-函数。5707
本文主要对BFSK在三种信道中传输性能以及信源编码设计进行模块的建立，以及性能仿真。
关键词： 通信系统;仿真;MATLAB;S-函数;系统设计
Communication system simulation based on MATLAB
Abstract：In modern society, with the increasing demand of communication system, the communication system functional requirements are also increasing. The performance and communication system is also high, structure more and more complicated, but the requirements of communication systems research and product development cycle is shortened, cost reduction, quality improvement. Such a sharp two requirements, only through the analysis and design techniques and tools to achieve the use of powerful computer-aided. The rapid development of modern computer science and technology, has developed a new generation visual simulation software. The simulation software is powerful, these powerful founder software makes the process of design and analysis of communication systems become straight and more convenient, this also makes the development of the communication system becomes more quickly.
Simulation of communication system has play a decisive role role for the development of communication system, the simulation of communication system has extensive adaptability and flexibility, we research on communication system plays a very good help.
This paper introduces the basic content of communications system simulation, the general steps of communication system simulation, including MATLAB in the visualization tool Simulink and S- function.
This paper focuses on the BFSK in the establishment of three kinds of transmission performance and source coding design of channel of module, and performance simulation.
Key word：Communication system, Simulation, MATLAB, S- Function, System design
目录
1. 绪论 1
1.1 通信系统仿真以及重要作用 1
1.1.1 通信系统仿真的概念 1
1.1.2 通信系统的作用 2
1.2 通信系统仿真问题的提出和研究 3
1.2.1通信系统仿真问题的提出 3
1.2.2通信系统仿真的研究价值 3
1.2.3本论文的主要研究内容 3
2. 通信系统仿真相关概述 4
2.1 通信系统仿真的一般步骤 4
2.1.1 仿真建模 4
2.1.2 仿真实验 4
2.1.3仿真分析 5
2.2 MATLAB介绍 5
2.3 simulink模块简介 6
2.4 S-函数介绍 9
2.4.1 S函数工作原理 10
3. 通信系统信道和噪声及其仿真 12
3.1 通信系统信道模型 12
3.2 通信系统噪声与信道 12