NDLI: Doppler angle estimation using the AR spectrum model

Content Provider	IEEE Xplore Digital Library
Author	Chih-Kuang Yeh Pai-Chi Li
Copyright Year	2000
Description	Author affiliation: Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan (Chih-Kuang Yeh)
Abstract	The transit time spectrum broadening effect has long been explored for Doppler angle estimation. Given acoustic beam geometry, the Doppler angle can be derived based on the mean Doppler frequency and the Doppler bandwidth. fast Fourier transform (FFT) based spectral estimators are typically used. One problem with this approach is that a long data acquisition time is required to achieve adequate spectral resolution. In this paper, an autoregressive (AR) model is proposed to obtain the Doppler spectrum using a limited number of flow samples. Since only a small number of samples are used, the data acquisition time is significantly reduced and real-time two-dimensional Doppler angle estimation becomes feasible. Results indicated that the AR method generally provided accurate Doppler bandwidth estimates. It also outperformed the conventional FFT method at small Doppler angles.
Starting Page	1513
Ending Page	1516
File Size	290030
Page Count	4
File Format	PDF
ISBN	0780363655
ISSN	10510117
DOI	10.1109/ULTSYM.2000.921611
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-10-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bandwidth Acoustic beams Acoustic scattering Data acquisition Geometry Interference Frequency estimation Fast Fourier transforms Ultrasonic transducers Ultrasonic imaging
Content Type	Text
Resource Type	Article

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