摘要
首先对几种典型信号的计算结果进行了分析，并比较研究了短时傅里叶变换和连续小波变换在心音信号时频分析方面的性能差异．指出了应用这２种方法应该注意的问题。
The properties of the Fourier transform and the continuous wavelet transform in the time frequency analysis are compared in this paper by studying several special signals. Several problems encountered in the applications of these methods like resolution and cross terms are pointed out. The time varying spectrum of the heart sound signal calculated with these two methods is studied according to the results obtained in the analysis.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1997年第8期25-28,共4页
Journal of Xi'an Jiaotong University
关键词
小波变换
时频分析
心音信号
心音图
信号处理
short time Fourier transform wavelet transform time frequency analysis heart sound
