几种AM信号数字化解调算法比较  

Comparison of Digitized Demodulation Algorithms for AM Signal

作　　者：张艺萌[1] 

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《现代电子技术》2011年第17期125-128,共4页Modern Electronics Technique

摘　　要：数字信号与模拟信号相比有很多优点,因此信号的数字化处理应用越来越普遍。作为常用信号,幅度(AM)调制信号的数字化处理也会得到更广泛的运用。通过研究3种AM信号数字化解调的算法,给出相应的解调原理、公式推导以及系统模块;采用Matlab对一段信号采用3种方法分别进行仿真解调,并对结果进行比较。在原理分析与仿真结果的基础上,通过比较获得3种方法各自的优缺点及应用场合,具有清晰明了的特点。Compared with analog signals, digital signals have many advantages, so the digital signal processing is popularly applied, and the digitized processing of the common amplitude modulated （AM） signal will be widely used in digital algorithms. The demodulation principle, formula derivation and system module are offered after study on three algorithms of AM signal digitized demodulation. The simulated demodulation of digital AM signal is carried out by three methods with Matlab. The advantages, disadvantages and application occasions of these algorithms were obtained on the basis of principle analysis and simulation results.

关 键 词：幅度调制 数字解调 解调算法 MATLAB 

分 类 号：TN911.334[电子电信—通信与信息系统]