摘要
介绍了用正交小波作为小波变换的基函数,对脉搏信号做多尺度不同频带分解,通过功率谱密度分析发现无论正常与否第4层细节信号能量主要集中在3-5Hz,而第5层细节信号能量集中在1-3 Hz。分别计算两者的能量作比较,结果表明,与正常信号相比,高血压信号3-5Hz频带内的能量显著增大。
This paper carries out the multi-scale decomposition of pulse signals on different frequency bands by wavelet transform,and the analysis of power spectral density shows that the detailed signal energy of the fourth layer mainly concentrates on the 3-5Hz,while the energy of the fifth layer concentrating on the 1-3Hz.Through calculating the energy,the experimental results show that： the hypertension signal energy of 3-5Hz band increases significantly,compared with the normal signals.
出处
《中国医疗器械杂志》
CAS
2010年第6期408-410,共3页
Chinese Journal of Medical Instrumentation
基金
国家自然科学基金资助项目60871020
关键词
高血压信号
小波变换
功率谱密度
能量
Hypertension
Wavelet transform
Power spectral density
Energy
