1、 本科毕业设计本科毕业设计(论文论文) (2012 届) 论文题目论文题目单边带调制电路仿真分析 (英文) Single side band modulation circuit simulation analysis 单边带调制电路仿真分析单边带调制电路仿真分析 摘摘 要要 首先了解单边带的发展概况，其次理解单边带的原理的基础上，介绍了传统 的滤波法，传统的滤波法需要滤波器的精确度很高，不利于实现。移相法实现单 边带调制，因带宽移相 90的精确度很难实现，所以不利于实际应用。维弗法 具有移相法正交调制的优点，又避免对调制信号带宽移相 90，只需对单一频 率的载波移相，同时边带滤波是在低频范围
2、内容易达到设计要求，易于用实际电 路来实现。通过比较理论的分析，提出设计方案。比较传统的滤波法，移相法实 现单边带调制，进行分析它们的结果。并以维弗法实现单边带为目标，分析其各 自的设计过程。 利用 NI 公司的 Multisim 软件为仿真工具分别对它们进行了仿真 分析，对比它们的仿真波形。 关键词：关键词：滤波法；移相法；维弗法 Abstract First of all know single side band, the development situation of second understand the principle of single side band was in
3、troduced on the basis of the traditional filtering method, the traditional filter method requires the accuracy of the filter is very high, prevents the realization. Phase shifting with the single modulation method to implement, because 90 phase shifting bandwidth to the accuracy of the difficult to
4、realize, go against so actual application. D eph method, with the method of orthogonal modulation phase shifting the advantages and avoid modulation signal bandwidth phase shifting 90 , just click on the single frequency carrier phase shifting, and at the same time sideband filter is in low frequenc
5、y range easy to meet the design requirements, easy to use practical circuit to achieve. By comparing the analysis of the theory, put forward the design scheme. The more traditional filtering method, phase shifting with the single modulation method to implement, to carry on the analysis of their resu
6、lts. And with d put with the single method to implement as the objective, this paper analyzes the design process of their own. Use of software for NI Multisim simulation tools they were respectively the simulation analysis, compared to their simulation waveform. Keywords: phase shift; Weaver method 目目 录录 1 引言 1 2 单边带调制技术原理 2 2.1 单边带调制技术的发展 2 2.2 SSB 信号的调制原理 2 3.实现单边带调制的若干方法. 5 3.1 滤波法. 5 3.2 移相法实现单边带调制. 6 3.3 维弗法实现单边带调制. 7 4软件仿真 9 4.1 滤波法实现的单边带的仿真. 9 4.2 相移法实现单边带调制. 11 4.3 维
