Title :
Differences in the power structures of Fourier transform and autoregressive spectral estimates of narrow-band Doppler signals
Author :
Fan, Lingke ; Evans, David H.
Author_Institution :
Dept. of Med. Phys., Leicester Univ., UK
fDate :
4/1/1994 12:00:00 AM
Abstract :
There is considerable interest in the application of autoregressive (AR) spectral analysis to ultrasonic Doppler signals. Sonograms produced using this technique are, however, very different from those produced using classic Fourier transform methods. Simulations have shown that the heights of the peaks in the AR spectra of narrow-band signals are not necessarily proportional to signal power, and should be used with caution in the context of Doppler signal processing.
Keywords :
Doppler effect; Fourier transform spectra; biomedical ultrasonics; medical signal processing; spectral analysis; Doppler signal processing; Fourier transform estimate; autoregressive spectral estimate; medical Doppler ultrasound; narrow-band Doppler signals; signal power structure; sonograms; Context modeling; Fourier transforms; Frequency; Narrowband; Signal analysis; Signal processing; Signal resolution; Sonogram; Spectral analysis; White noise; Algorithms; Bias (Epidemiology); Blood Flow Velocity; Blood Vessels; Fourier Analysis; Models, Cardiovascular; Regression Analysis; Signal Processing, Computer-Assisted;
Journal_Title :
Biomedical Engineering, IEEE Transactions on