文档详情

基于Multisim的模拟信号数字化系统的毕业设计.doc

发布:2017-12-29约2.76万字共51页下载文档
文本预览下载声明
摘 要 目前,无论是模拟通信还是数字通信,在不同的通信业务中都得到了广泛的应用。但是,数字通信由于其良好的传输性,现已成为当代通信技术的主流。本文主要讨论模拟信号数字传输,对模拟信号进行数字化,以实现高效率传输。 模拟信号数字化方面,设计实现了均匀量化与编码系统、PCM编解码系统、脉幅调制系统。各个调制解调系统以Multisim软件为仿真平台,实现了模拟信号数字传输。 本论文第二章介绍了电子设计自动化与仿真工具EWB的基本知识,重点介绍了Multisim仿真软件。第三章对均匀量化与编码系统进行了设计与实现,首先介绍量化、编码原理,接着进行电路设计、系统仿真。第四章对PCM系统进行了设计与实现,首先介绍PCM原理,接着进行电路设计、系统仿真。第五章对脉幅调制系统进行了设计与实现,首先介绍了PAM原理,接着进行电路设计、系统仿真。仿真实验表明,模拟信号数字化能更好的适应信道的传输,克服了诸如误码率、失真等不足。 关键字:PCM系统;均匀量化与编码系统;PAM系统;Multisim软件 Abstract At present, either analog or digital communication, communication in different communication in business have been widely used. However, due to its good digital communication, the transmission of contemporary communication technology has become the mainstream. This article mainly discuss analog signals to simulate digital transmission and digital signals, in order to realize efficient transmission. Digital simulation signal and the uniform design realize quantitative and coding systems and PCM codec, pulse amplitude modulation system. Each demodulation system by simulation platform for Multisim software, realize the analog signal digital transmission. This paper described the electronic design automation and basic knowledge of EWB simulation tools, introduces emphatically Multisim simulation software. The third chapter of uniform quantification and coding systems design and implementation, first introduced, coding theory, and the circuit design, the system simulation. The fourth chapter of PCM system design and implementation, first introduced, and principle of PCM circuit design, the system simulation. The fifth chapter of pulse amplitude modulation system design and implementation, first introduced the principle, PAM and circuit design, the system simulation. Simulation results show that the digital simulation signal can better adapt to the transmission channel, overcome the disadvantages, such as distortion, such as additive. Keywords: PCM system;Even with the coding system, quantitative;PAM system;Multisim software
显示全部
相似文档