毕业设计（论文）基带信号在数字传输系统中的研究与仿真.doc

目 录 摘要 ? II 第一章 绪 论 1 1.1 数字基带信号传输系统研究意义与作用 1 1.2 数字基带信号传输系统在国内外研究现状及发展 1 第二章 数字基带信号传输系统的介绍 3 2.1 研究意义 3 2.2数字基带传输系统 3 2.2.1 基带传输系统简介 3 2.2. 基带传输过程 第三章 基带信号在数字传输系统中的调制与解调 5 3.1数字基带信号的频谱特性 5 3.2数字基带信号的常用码型及码型选择原则 6 3.2.1码型选择原则 6 3.2.2 常用码型 6 3.2.3 常用码型的波形 3.3基带信号的调制与解调 第四章 基带信号在数字传输系统中的仿真 1 4.1 数字基带信号传输原理 1 4.2 仿真程序结构框图 1 4.3 仿真实验结果 1 4.4 实验结果分析 15 总 结 参考文献 致 谢 基带信号在数字传输系统中的研究与仿真 摘要：基带传输频带传输，线性带通系统以，，掌握数字基带传输的基本理论。外，数字通信技术的发展基带传输方式发展，。 关键词：低通线性带通数字基带通信 Baseband Signal in a Digital Transmission System in the Research and Simulation Abstract: the basic theory of digital baseband transmission not only apply to the baseband transmission, but also is suitable for the transmission frequency band, because all of the narrow band signal number, linear band-pass system as well as the number of communication system based on linear band-pass response all can use the low traffic Numbers, the equivalent equivalent low-pass low-pass system and system of equivalent size low communication response, so the band transmission system can be equivalent of its low pass (or the equivalent baseband transmission system of the theoretical analysis and computer simulation to study its performance, thus to master the basic theory of digital baseband transmission is very important, he has universal significance in the digital communication system. In addition, in the process of using a symmetrical cable data communication system widely used in the transmission mode, and, with the development of digital communication technology, the way of baseband transmission also has a rapid development trend, at present, it is not only used for low speed data transmission, but also used for high-speed data transmission. Keywords: Digital baseband communication system；The response，；Lowpass；Bandpass linear  第一章 绪 论 1.1 数字基带信号传输系统研究意义与作用 数字传输技术，数字信号传递信息，通信进入了数字时代［1］。目前，数字化，我国公众通信网。数字通信技术越来越广泛，如数字电视广播、、多媒体通信等［2］。，频带传输用广，但基带传输。：第一，频带传输系统必须考虑的问题数字基带系统；第二，，基带传输这种方式数字通信技术的发展，它不用于低速数据传输，而且还用高速数据传输；第三总等效的