基于小波脊的轨道电路FSK瞬时特征提取  

Instantaneous Characteristics Extraction of Track Circuit FSK Based on Wavelet Ridge

作　　者：金晓宏[1] 吕浩炯[2] 汤长春[1] 怀猛[1] 

机构地区：[1]武汉科技大学机械自动化学院,湖北武汉430081 [2]株洲南车时代电气股份有限公司安全装备事业部,湖南株洲412001

出　　处：《机车电传动》2007年第4期59-61,共3页Electric Drive for Locomotives

基　　金：湖北省教育厅自然科学基金重点科研项目(2006D11012)

摘　　要：小波脊线技术能对信号特征进行有效的提取。利用连续Morlet小波变换后的相位进行迭代计算,对轨道电路移频信号的脊进行提取;利用该变换算法,对实际FSK信号的瞬时特征进行提取,验证了该算法能有效地提取瞬时频率和低频控制信号。文中同时给出了算法详细的计算步骤,提供了一种有效、简单的分析和判断轨道电路移频信号的方法。With wavelet-ridge-curve technology, the signal characteristics can be extracted effectively. By the iterative calculation, the phases of the continuous Morlet wavelet transformation ,are used to extract the ridges of railroad FSK signals. With the algorithm, the instantaneous characteristics of the actual FSK data are extracted, which proves that the algorithm works effectively for the extraction of the instantaneous frequency and low frequency control signal. The steps for algorithm are also given in detail. An effective and simple method to analyze and judge the track circuit frequency-shift signal is developed.

关 键 词：连续小波变换 小波脊 移频信号 轨道电路 

分 类 号：U284.2[交通运输工程—交通信息工程及控制]