基于窗口平均频率算法的调制信号识别  

Identification of Digital Modulation Signals Based on the Algorithm of Shift Window’s Average Frequency

作　　者：张遥[1] 顾旭 曹毅[3] 

机构地区：[1]山东大学威海分校信息工程学院,山东威海264209 [2]新疆机电职业技术学院,新疆乌鲁木齐830011 [3]重庆社会工作职业学院,重庆400055

出　　处：《无线电通信技术》2007年第2期26-28,54,共4页Radio Communications Technology

摘　　要：给出了一种对非平稳信号的时频特性进行快速分析的算法——移动窗口平均频率算法,通过移动窗口来截取信号,并计算窗口内信号平均频率来获得信号的时频分布,具有算法简单、运算速度快的特点;通过MATLAB仿真验证了该方法的有效性和可靠性;并给出了该算法的一个应用实例——从噪声中识别数字调制信号,能够对ASK、FSK、PSK等信号的调制类型进行识别,改善了信号识别的性能。In this paper, a fast algorithm to analyze time-frequency distribution of non-stationary signals is given. It is called algorithm of shift window＇s average frequency. This algorithm features both simple complicating and high efficiency. Effectiveness and reliability of the algorithm are proved by MATLAB simulation. An application to identify digital modulation signals from noise is presented, the identification performance can be improved by this algorithm.

关 键 词：时频分布 频谱 信号识别 仿真 

分 类 号：TN911.6[电子电信—通信与信息系统]