基于MATLAB的通信系统的设计与仿真
摘要 通信是通过某种媒体进行的信息传递，目的是传输信息，通信系统是用以完成信息传输过程的技术系统的总称，作用是将信息从信源发送到一个或多个目的地。调制与解调在信息的传输过程中占据着重要的地位，是不可或缺的，因此研究系统的调制和解调过程就极为重要。MATLAB是集数值计算、图形绘制、图像处理及系统仿真等强大功能于一体的科学计算语言，它强大的矩阵运算和图形可视化的功能以及丰富的工具箱，为通信系统的调制和解调过程的分析提供了极大的方便。
本论文首先介绍了通信系统的概念，进而引出调制和解调，然后介绍了我们常用的几种调制和解调的方法。由于MATLAB具有的强大功能所以详细介绍了MATLAB通信系统工具箱，并给出了基于MATLAB的通信系统的调制与解调的实现，运用MATLAB仿真软件进行仿真。
关键词 通信系统；调制与解调； MATLAB
Simulation And Design Of Communication Systems Based On MATLAB
Abstract Communication is through a media for transportation. Communication system which is used to complete the process of information transmission systems ,in general, is to send the information from the source to one or more destinations.
Modulation and demodulation occupied an important position in the transmission of information which is essential, so the research about the modulation and demodulation process in the communication system is extremely important. MATLAB is a numerical computation, graphics rendering, image processing and system simulation and other powerful features in one of the scientific computing language, it is a powerful matrix calculation and graphical visualization features and a rich toolbox provides a great convenience for the communication system of modulation and demodulation process.
This paper introduces the concept of the communication system, and then leads to modulation and demodulation, and then introduced several of our commonly used method of modulation and demodulation. As the power of MATLAB so we introduced the communication system toolbox in the MATLAB. We gives several examples about the communication system based on MATLAB modulation and demodulation and use the software of MATLAB to simulate them.
Keywords Communication Systems; Modulation and demodulation; MATLAB
目录
1 引言 1
2 通信系统的调制与解调 2
2.1通信系统的概念 2
2.2调制和解调的概念 4
2.3 幅度调制和相干解调的原理 5
3 MATLAB通信系统工具箱 7
4 基于MATLAB的模拟调制和解调实例 8
4.1 用MATLAB分析双边带幅度调制（DSM-AM） 8
4.2 用 MATLAB 分析相干解调过程 10
总结 12
参考文献 13
致 谢 14
参考文献
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