摘要
针对铁路移频信号的信息特点,提出了利用小波脊线技术分析移频信号信息特征的具体方法。该方法可以快速、准确地计算出移频信号的瞬时频率和信号包络,并根据所得出的瞬时频率推算出相应的调制低频信息,为铁路移频和UM71信号的分析和译码提供了一个新的方案。
According to the features of frequency shift signals, a feature extraction method based on the wavelet ridge line technique is proposed. This method provides a quick and accurate way to calculate the instantaneous frequency and envelope of frequency shift signal. Based on the calculated instantaneous frequency, the modulating low frequency can be imputted accordingly, thus providing a new scheme for analyzing and decoding the railway dedicated frequency shift signal and UM71 signal.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2006年第1期117-120,共4页
Journal of the China Railway Society
关键词
小波分析
小波脊线
移频信号
wavelet analysis
wavelet ridge
frequency shift signal
