一种基于循环谱的数字信号调制识别方法  

Algorithm for Modulation Recognition of Digital Signals Based on Cyclic Spectrum

作　　者：郭伟涛[1] 王华力[2] 

机构地区：[1]解放军理工大学通信工程学院研究生4队,江苏南京210007 [2]解放军理工大学通信工程学院电子信息工程系

出　　处：《军事通信技术》2011年第2期22-26,共5页Journal of Military Communications Technology

摘　　要：文章基于循环平稳信号处理理论,利用数字通信信号的循环谱特征的不同提出四个特征参数,用于信号调制识别。提取的参数较少,计算量较高阶循环累积量小。给出了三类信号调制方式自动识别算法的实现流程,该识别算法以统计理论为基础,不要求实现载波同步。仿真结果表明,在信噪比RSN≥5 dB时,算法的平均识别成功率>96%。In this paper,four key features based on cyclostationary are proposed to automatically recognize digital communication signals as their cyclic spectrums are different.The calculation of the proposed four key features has been less complicated than cyclic higher-order cumulant.A modulation identification algorithm based on statistical theory is also developed which removes the need for carrier wave synchronization.Computer simulations show that the average rate of recognization is higher than 96% at RSN≥ 5 dB.

关 键 词：循环谱 调制分类 统计参数 

分 类 号：TN911.6[电子电信—通信与信息系统]