Key result
New Doppler ultrasound mean frequency estimator achieves linearity within ~2% from 200 Hz to 10 kHz.
Why the study?
A practical and inexpensive analogue method for instantaneous mean frequency estimation from Doppler signals is needed for quantitative blood flow measurement.
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May support real-time Doppler processing in practice; leaves open in vivo validation before clinical adoption.
Beard et al. (1987) studied this question. Analogue instantaneous mean frequency estimator vs. Digital signal processing techniques was evaluated on Linearity and frequency range. An analogue instantaneous mean frequency estimator for Doppler ultrasound was developed, demonstrating linearity to within 2% over a frequency range of 200 Hz to 10 kHz.
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