Title :
A Comparison Between Mean Frequency Estimators for Multigated Doppler Systems with Serial Signal Processing
Author :
Kristoffersen, K. ; Angelsen, B.A.J.
Author_Institution :
Division of Engineering Cybernetics, Norwegian Institute of Technology
Abstract :
Eight different discrete time mean frequency estimators for complex Doppler signals are derived and analyzed. The estimators are well suited for use in multigated Doppler ultrasound measurements of blood velocity profiles. Approximate expressions for bias and variance of the estimators are derived. A general scheme for extending the analyzing range of discrete time Doppler frequency estimators above the Nyquist limit is also outlined.
Keywords :
Bandwidth; Frequency estimation; Instruments; Narrowband; Pulse measurements; Signal design; Signal processing; Ultrasonic imaging; Ultrasonic variables measurement; Velocity measurement; Biomedical Engineering; Biometry; Blood Flow Velocity; Doppler Effect; Physics; Rheology; Ultrasonics;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.1985.325582
