TIME-FREQUENCY ANALYSIS OF SINGLE-SWEEP EVOKED POTENTIALS BASED ON WAVELET TRANSFORM
基于小波变换的单次诱发电位信号时频分析

To estimate and analyze evoked potentials (EP) obtained from Imitation of Natural Reading stimulus paradigm, single-sweep EP based on wavelet transform was compared with averaged EP in time and frequency domain. And the localization of brain functional source was applied. The results showed that averaged EP might lose some essential components and the analysis of brain functional source localization could only reflect the static process of equivalent brain functional source. But single-sweep EP based on wavelet transform with the localization of brain functional source could obtain ample information of EP, and reflect real-time dynamic process of brain functional source. It suggested that time-frequency analysis of single-sweep EP based on wavelet transform is a new effective method processing electroencephalograph signal.