Time-domain estimation of the center frequency and spread of Doppler spectra in diagnostic ultrasound
- 1 November 1988
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
- Vol. 35 (6) , 685-700
- https://doi.org/10.1109/58.9324
Abstract
Two sets of estimators of the centre frequency and mean-square bandwidth of a Doppler spectrum are analyzed. The first set is based on a linear combination of the complex autocorrelation of the Doppler signal for different lags. It is then shown that the argument (phase angle) of the complex autocorrelation function at unit sample lag is a close approximation to the mean Doppler shift, whereas its modulus (magnitude) gives information about the mean-square bandwidth of the spectrum. Approximate expressions for the bias and variance of the estimators are derived, valid for long averaging times. The performances of the estimators are compared for signals with rectangular spectra and different signal-to-noise ratios.<>Keywords
This publication has 17 references indexed in Scilit:
- A Comparison Between Mean Frequency Estimators for Multigated Doppler Systems with Serial Signal ProcessingIEEE Transactions on Biomedical Engineering, 1985
- A New Time Domain Technique for Velocity Measurements Using Doppler UltrasoundIEEE Transactions on Biomedical Engineering, 1985
- Discrete Time Estimation of the Mean Doppler Frequency in Ultrasonic Blood Velocity MeasurementsIEEE Transactions on Biomedical Engineering, 1983
- Instantaneous Frequency, Mean Frequency, and Variance of Mean Frequency Estimators for Ultrasonic Blood Velocity Doppler SignalsIEEE Transactions on Biomedical Engineering, 1981
- Power-spectrum centroid detection for doppler systems applicationsUltrasonic Imaging, 1980
- A Theoretical Study of the Scattering of Ultrasound from BloodIEEE Transactions on Biomedical Engineering, 1980
- On Ultrasonic MTI Measurement of Velocity Profiles in Blood FlowIEEE Transactions on Biomedical Engineering, 1979
- Topoflow - A digital full range Doppler velocity meterIEEE Transactions on Sonics and Ultrasonics, 1978
- On the instantaneous measurement of bloodflow by ultrasonic meansMedical & Biological Engineering & Computing, 1972
- Analysis of an estimator of the center frequency of a power spectrumIEEE Transactions on Information Theory, 1968