模拟调制信号的自动调制识别  

Automatic Analog Modulation Recognition

作　　者：游伟[1] 周先敏[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《信号处理》2009年第1期77-80,共4页Journal of Signal Processing

摘　　要：调制方式是通信信号的一个重要的特征参数。无论军事或者民用目的,都通常需要对这些信号进行监测。因此对自动调制识别算法的研究具有十分重要的意义。本文基于某无线电监测系统,研究了六种模拟调制信号的自动调制识别算法。针对DSB信号,设计了一个新的特征参数来描述其相位特征,有效的解决了噪声对其相位跳变的影响。文中给出了其表达式和计算流程。通过正交变换得到信号的特征参数。在SNR=5dB时,正确识别率达到97%以上。理论分析与仿真结果证明算法的有效性。Communication signals can have different modulation types. Modulation type is an important feature parameter of one signal. Usually, it is required to monitor these signals, either for military or for civilian purposes. Thus, study of automatic modulation rec- ognition （AMR） algorithms has important significance. This paper is based on one radio monitoring system ,and studies AMR algorithm of six types of analog modulation signals. For DSB signal, design a new feature parameter to describe its phase property, and settle the im- pact of noise effectively. We show its expression and computing flow chart. Derive signal feature parameters through orthogonal transform. When SNR = 5dB, the success rate is larger than 97%. Theoriotieal analysis and simulation results demonstrate the validity of the algorithm.

关 键 词：自动调制识别 特征参数 正交变换 

分 类 号：TN911.72[电子电信—通信与信息系统]