脉冲幅度调制解调系统
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专业课程设计报告题目：脉冲幅度调制解调系统
姓名：
专业：通信工程
班级学号：
同组人：
指导教师：
南昌航空大学信息工程学院
年月日
摘要
在通信系统中，调制与解调是实现信号传递必不可少的重要手段。所谓调制就是用一个信号去控制另一个信号的某个参量，产生已调制信号。解调则是调制的相反过程，而从已调制信号中恢复出原信号。信号从发送端到接收端，为了实现有效可靠和远距离传输信号，都要用到调制与解调技术。
该系统用于实现脉冲幅度调制解调，采用模块化结构设计，包括输入电路模块、脉冲发生电路模块、调制电路模块、解调滤波电路模块、功放输出电路模块。整个电路的设计借助于multisim 10仿真软件和数字逻辑电路相关理论知识，采用模块化的设计思想，使设计变得简单、方便、灵活性强。
该系统由采样定理实现了对输入正弦信号的调制，然后经由有源二阶滤波器实现了解调并输出正弦信号，最后通过lm386组成的功放电路驱动喇叭发出声音，更加直观地判断解调前后的声音变化，从而判断该系统是否实现了信号的调制解调。
关键词: 调制解调模块化设计通信系统采样定理
目录
第一章设计内容及要求 ··························································································错误！未定义书签。
1.1 脉冲幅度调制解调系统的设计要求及任务·················错误！未定义书签。
1.1.1 设计基本要求··························································错误！未定义书签。
1.1.2 设计任务及目标······················································错误！未定义书签。
1.2 设计的主要参考器件·····················································错误！未定义书签。第二章电路设计原理 ······························································································错误！未定义书签。
2.1 系统工作原理·································································错误！未定义书签。
2.2 设计方案比较和选择·····················································错误！未定义书签。
2.3 主要元器件介绍·····························································错误！未定义书签。
2.4 单元模块·········································································错误！未定义书签。
2.4.1 输入电路模块··························································错误！未定义书签。
2.4.2调制电路模块···························································错误！未定义书签。
2.4.3解调滤波电路模块···················································错误！未定义书签。
2.4.4脉冲发生电路模块···················································错误！未定义书签。
2.4.5 功放输出电路模块··················································错误！未定义书签。第三章系统的具体设计思路··················································································错误！未定义书签。
3.1 各模块参数设计···························································错误！未定义书签。
3.1.1 取样脉冲发生器设计··············································错误！未定义书签。
3.1.2 二阶RC有源滤波器设计 ······································错误！未定义书签。
3.1.1 取样脉冲发生器设计………………………………………………错误！未定义书签。第四章实验、调试及测试结果与分析 ···························································错误！未定义书签。
4.1系统安装与焊接······························································错误！未定义书签。
4.2 电路的调试·····································································错误！未定义书签。
4.3 实验结果记录及分析·····················································错误！未定义书签。
4.3.1取样脉冲发生结果分析………………………………………………错误！未定义书签。
4.3.2抽样脉冲波形分析 (14)
4.3.3解调波形分析 (15)
4.3.4 功放输出电路模块分析 (16)