心脏多普勒血流信号的自回归谱分析

Autoregressive Spectral Analysis of Heart Doppler Blood Flow Signals

1 原理与方法自回归信号模型是一种仅含有反馈回路的递归结构的全极点模型,简称 AR 模型(Au(?)ore-gressiye Model).在本研究中,采用 Burg 法和 Marple 法确定模型的自回归系数α_k 以及予测误差功率.采用 FPF(最终订测误差)

Autoregressive dynamic power spectra of Doppler blood flow signals form both normal people and mitral stenosis patients are analysed by using a three order AR model.The results indicates that the autoregressive spectrum can provide three dimensional dynamic blood flow information with high resolution,compared with FFT method which has important diagnositic significance for mitral stenosis diseases.