大学毕业论文-—通信系统中数字调制技术的研究与仿真设计

通信系统中数字调制技术的讨论与仿真摘 要在日常的生活中，通信是人们用来传递信息的方式。随着数字系统的飞速进展，对数字系统的性能和调制解调技术要求也越来越高。同时，由于计算技术的进展，通信系统的仿真已日益普遍，已逐渐成为今日设计和分析通信系统的主要工具。本次设计将使用 MATLAB 软件设计函数和 Simulink 建模对数字调相技术进行仿真和讨论。本文在第一章中介绍了通信系统的组成、MATLAB 的使用以及 Simulink模块的组建。第二章深化分析了 2ASK、2PSK、2FSK 的调制解调原理理论知识，熟悉了原理后，在第三章中用 MATLAB 编程和 Simulink 对它们进行仿真和讨论。本设计主要实现 2ASK、2PSK、2FSK 调制解调过程的仿真，并分析它们的性能差异。最后一章对数字调制与解调作了一个总结。关键词： MATLAB 调制解调 2ASK 2PSK 2FSKResearch and Simulation of Digital Modulation Technology in Communication SystemMajor: communication engineering Student: Qin Kai Supervisor: Tang QuanAbstractIn day-to-day life ， communication is used to convey information. With the rapid development of digital systems，digital system for modem performance and the technical requirements of increasingly high.At the same time ，the development of computing technology ，simulation of communication systems have become increasingly common，have gradually become the design and analysis of today's main tool for communication systems. In chapter 1, this paper introduces the composition of the communication system, the use of MATLAB and Simulink module is established. The second chapter in-depth analysis of the 2 ASK, 2 PSK, 2 FSK of demodulation principle theory knowledge, be familiar with the theory, in the third chapter using MATLAB programming and Simulink simulation and research on them. This design mainly realizes 2 ASK, 2 PSK, 2 FSK demodulation process Simulink, and analyzes the performance of their differences. The last chapter of digital modulation and demodulat...