A SIMULATION OF TRANSIT-TIME EFFECTS IN DOPPLER ULTRASOUND SIGNALS

被引：26

作者：

JONES, SA

GIDDENS, DP

机构：

[1] Department of Aerospace Engineering, Georgia Institute of Technology, Atlanta

来源：

ULTRASOUND IN MEDICINE AND BIOLOGY | 1990年 / 16卷 / 06期

关键词：

Autoregression; Doppler; Instantaneous frequency; Simulation; Spectral estimation; Transit time; Ultrasound;

D O I：

10.1016/0301-5629(90)90026-9

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A signal model is proposed which can be used to study frequency extraction techniques for Doppler ultrasound. The signal is based on the physics of the Doppler process and depends on a sliding window used to average a set of independent Gaussian random numbers. This window is related to the shape of the sample volume for the Doppler pulse and depends on the Doppler angle. Simulation results compare favorably with results from flow experiments in terms of the variance of the estimated Doppler shift, the shape of the power spectra and the behavior of the signals with respect to Burg autoregressive power spectra. A potential use of the signal in the study of spectral analysis techniques is presented. © 1990.

引用

页码：607 / 619

页数：13

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