MQAM调制系统的计算机仿真试验(论文).doc

毕业设计（论文） MQAM调制系统的计算机仿真试验 摘 要 多电平正交振幅调制(Multilevel Quadrature Amplitude Modulation)是一种具有高频谱利用率的调制技术。Simulink提供了用方框图进行建模仿真的图形接口，它的存在使MATLAB的功能得到进一步的扩展，实现了可视化的建模仿真及多工作环境间文件互用和数据交换，让理论研究和工程实现有机地结合在一起。MATLAB的动态仿真工具Simulink对所建立的通信系统仿真模型进行仿真分析。该次设计主要采用的模型库是通信系统工具Communication Blockset，使用命令进行仿真，仿真结果在运行的同时通过图形窗口显示出不同信噪比对应的误率，从而衡量MQAM通信系统的性能。多进制正交调制；MATLAB语言；Simulink动态仿真 Abstract Multi-level quadrature amplitude modulation is a high utilization of the spectrum modulation technique. Simulink provides a block diagram for modeling and simulation with the graphics interface, its existence enabled MATLAB the function to obtain the further expansion, has realized between the visualization modelling simulation and the multi-working conditions the document uses mutually with the data exchange, let the fundamental research and the project realizes organically unifies in together. This article uses MATLAB to realize the MQAM modulation function from the definition M function, more direct-viewing demonstration MQAM modulation baseband constellation. Uses MATLAB dynamic simulation tool Simulink for the communications system simulation model which establishes to carry on the simulation analysis. This design mainly uses the model base is the communications system tool----Communication Blockset, the use order carries on the simulation, the simulation result demonstrates the different signal-to-noise ratio correspondence during movement through the graph window the error rate, thus weighs the MQAM communications systems performance. Keywords　 Multiple system quadrature amplitude modulation； MATLAB language； Smulink dynamic simulation 目录 摘 要 I Abstract II 第1章 绪论 1 1.1 课题背景 1 1.1.1 个人通信的发展 1 1.1.2 MQAM的发展背景 3 1.2 本论文的内容及论文安排 4 第2章 个人通信系统的调制解调技术 5 2.1 引言 5 2.1.1 个人通信的本质 5 2.1.2 个人通信的四要素 5 2.2 个人通信的技术基础 6 2.3 个人通信的无线接入部分的系统组成 7 2.4 个人通信网的演进 7 2.5 调制/解调技术 8 2.5.1 调制技术的主要分类 8 2.5.2 解调技术的主要分类 8 2.5.3 MQAM技术的应用 9 2.6 本章小结 12 第3章 Matlab及其Simulink通信仿真 13 3.1 MATLAB概述 13 3.1.1