模拟调制系统的MATLAB仿真  

MATLAB Simulation of Analog Modulation System

作　　者：王丹[1] 赵凯[2] 

机构地区：[1]郑州航空工业管理学院,河南郑州450015 [2]铁道警察学院,河南郑州450000

出　　处：《装备制造技术》2015年第12期30-32,共3页Equipment Manufacturing Technology

摘　　要：调制在通信系统中的作用至关重要,通信的目的是传输信息,因而如何准确的传输信息是通信的一个重要目标。模拟调制是载频信号的幅度、频率或相位随着预传输的模拟输入信号的变化而相应的发生变化的调制方法。对模拟调制系统中的线性调制进行了仿真,从仿真结果来看,AM的调制效率较低,它的包络与m(t)的形状完全一样,DSB信号抑制了AM信号的载波分量,因此调制效率是100%,SSB信号只传输DSB信号中的一个边带,所以频谱最窄,效率最高。It is very important for the modulation in communication system. The purpose of communication is to transmit information, so it is an important target for communication. Analog modulation carrier signal amplitude, frequency, or phase change with the analog input signal to the pre transmission and corresponding occurrence change modulation method. In this paper, the simulation results show that the modulation efficiency of AM is low, the DSB signal is the same as the m （t）. Therefore, the modulation efficiency is 100%, and the SSB signal is only one of the DSB signals, so the spectrum is the most narrow and the efficiency is the highest.

关 键 词：调制 通信 调幅 双边带 单边带 

分 类 号：TN914[电子电信—通信与信息系统]