目录第1章前言.......................................................................................................................-2-第2章AM，FM,PM调制原理......................................................................................-3-2.1AM调制原理.......................................................................................................-3-2.2FM调制原理........................................................................................................-3-2.3PM调制原理........................................................................................................-5-第3章几种调制方式的比较.........................................................................................-7-3.1PM与FM的比较................................................................................................-7-3.2几种不同的模拟调制方式..................................................................................-7-3.3几种模拟调制的性能比较..................................................................................-8-3.4几种模拟调制的特点及应用..............................................................................-9-第4章AM,FM,PM的调制仿真....................................................................................-10-4.1AM的调制仿真.................................................................................................-10-4.1.1理想状态下的AM调制仿真..................................................................-10-4.1.2含噪声情况下的AM调制仿真...............................................................-11-4.2FM的调制仿真..................................................................................................-13-4.21理想状态下的FM调制仿真....................................................................-13-4.22含噪声情况下的FM调制仿真................................................................-14-4.3PM的调制仿真..................................................................................................-15-心得体会.........................................................................................................................-16-参考文献.........................................................................................................................-17-附录.................................................................................................................................-18-AM、FM、PM、实现及性能比较第1章前言通信系统是为了有效可靠的传输信息，信息由信源发出，以语言、图像、数据为媒体,通过电(光)信号将信息传输，由信宿接收。通信系统又可分为数字通信与模拟通信基于课程设计的要求，下面简要介绍模拟通信系统。信源是模拟信号，信道中传输的也是模拟信号的系统为模拟通信。模拟通信系统的模型如图1所示。图1模拟通信系统模型调制器:使信号与信道相匹配,便于频分复用等。发滤波器:滤除调制器输出的无用信号。收滤波器:滤除信号频带以外的噪声，一般设N(t)为高斯白噪声,则Ni(t)为窄带白噪声。第2章AM，FM,PM调制原理2.1AM调制原理幅度调制是用调制信号去控制高频正弦载波的幅度，使其按调制信号的规律变化的过程。幅度调制器的一般模型如图2.1.1所示。图2.1幅度调制模型在图2.1中，若假设滤波器为全通网络（H（）＝1），调制信号叠加直流后再与载波相乘，则输出的信号就是常规双边带（AM）调幅.AM调制器模型如图2.2所示：图2.2AM调制模型AM信号波形的包络与输入基带信号成正比，故用包络检波的方法很容易恢复原始调制信号。但为了保证包络检波时不发生失...
