体表胃电信号的时-频域分析

A Time-Frequency Domains Analysis of Electrogastrogram

把短时傅里叶变换用于体表胃电时-频域分析,结果表明,利用短时傅里叶变换等时-频域分析,可以同时得到体表胃电信号的时域幅度变化和能量分布特征。

Electrogastrogram (EGG) detecting and analysis are very important for the studying of gastric dynamics. Here, based on the research of time domain and frequency domain properties of EGG, the author applied the STFT method to analyse the EGG on time-frequency domain. The experimental results indicate that, the amplitude variety and energy distribution of EGG can be measured at the same time with the STFT analysis.